Permit To Work System Manual
DOCUMENT ID - PR 1172
REVISION- 6.1
DATE
- 15/12/2008
UNRESTRICTED
Nov-08
Document ID: PR-1172
Filing Key: Business Control
Petroleum Development Oman L.L.C.
Engineering and Operations
Permit to Work System
User Note:
The requirements of this document are mandatory. Non-compliance shall only be authorised by
the Document Owner or his Delegate through STEP-OUT approval.
A controlled copy of the current version of this document is on PDO's EDMS. Before making
reference to this document, it is the user's responsibility to ensure that any hard copy, or
electronic copy, is current. For assistance, contact the Document Custodian or the Document
Controller.
Users are encouraged to participate in the ongoing improvement of this document by providing
constructive feedback.
Please familiarise yourself with the
Document Security Classification Definitions
They also apply to this Document!
This document is the property of Petroleum Development Oman, LLC. Neither the whole nor any part of
this document may be disclosed to others or reproduced, stored in a retrieval system, or transmitted in any
form by any means (electronic, mechanical, reprographic recording or otherwise) without prior written
consent of the owner.
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i
Revision 6.1
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Document Authorisation
Authorised For Issue – November 2008
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ii Revision History
The following is a brief summary of the 5 most recent revisions to this document. Details of all
revisions prior to these are held on file by the issuing department.
Revision
No.
6.1
Date
Author
Scope / Remarks
Dec-08
Del Ellbec UOP/7
Rectification of minor printing errors
6.0
Nov-08
Del Ellbec UOP/7
Incorporating changes from PTW
annual review / audit, and user
feedback Reformatted and Change of
Ownership
5.0
Jul-05
Obaid.R.Al-Maani
Incorporation of changes due to NOM
and October 2004 Level 2 PTW Audit
recommendations,
including
the
revision of the formation of Assessment
team members in PTW licensing panel
across the company.
4.0
Jul-02
Hamed S. Al-Khalfeen
Incorporation of changes from Permit
to Work Workshop conducted on 12
Mar 2002.
Ref. Ind: CSM/11
3.0
Mar-99
Incorporation of changes from Yibal
pilot operation
2.0
Nov-98
Re-write of Version 1 Manual, including
revision of requirement for work
needing a Permit, and emphasis on the
role of the Job HSE Plan. Incorporation
of Addendum of system detail
operation and licensing requirements,
together with other detail changes.
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iii Related Business Processes
Code
EP 72
Business Process (EPBM 4.0)
Maintain and Assure Facilities Integrity
iv Related Corporate Management Frame Work (CMF)
Documents
The related CMF Documents can be retrieved from the CMF Business Control Portal.
CP-122
Health, Safety and Environment Management Manual
CP-114
Maintenance CoP
CP-118
Well Life Cycle Integrity
SP-1108(22)
Electrical Safety Operating Procedures (ESOP-22 Live Line Working and
Live Line Washing Practices
SP-1157
HSE Training
SP-1170
HSE Specification - Naturally Occurring Radioactive Materials (NORM)
PR-1001a
Facility Change Proposal Procedure
PR-1001c
Temporary Override of Safeguarding System Procedure
PR-1001e
Operations Procedure Temporary Variance
PR-1076
Isolation of Process Equipment
PR-1078
Hydrogen Sulphide Management
PR-1148
Entry into a Confined Space
PR-1154
Gas Testing
PR-1242
Activities in the Vicinity of Overhead Power Lines
GU-501
Guidelines for Excavating and Working Around Live Pipelines
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TABLE OF CONTENTS
Executive Summary .................................................................................................................... 10
1
2
3
4
5
6
PDO Permit to Work System ............................................................................................... 11
1.1
Scope ............................................................................................................................. 11
1.2
Objectives....................................................................................................................... 11
1.3
Changes to the Document ............................................................................................. 12
1.4
Step-out Approval .......................................................................................................... 12
Management of the Permit to Work System ........................................................................ 13
2.1
System Custodian and Focal Points .............................................................................. 13
2.2
Responsibilities of the System Custodian, OXO/2 and Focal Points ............................. 13
Work That Needs a Permit to Work ..................................................................................... 15
3.1
What is a Permit to Work system? ................................................................................. 15
3.2
Types of Permit .............................................................................................................. 17
3.3
Location of Work ............................................................................................................ 17
3.4
Activities Requiring a Permit .......................................................................................... 18
3.5
Gas Test Frequency ....................................................................................................... 19
3.6
Type of Permit Required ................................................................................................ 20
3.7
Work in Other Areas under the Control of PDO ............................................................. 23
3.8
Other Work ..................................................................................................................... 24
3.9
Work in Areas Not Under the Control of PDO ................................................................ 24
Worksite Examination and Restrictions on Permit Work ..................................................... 26
4.1
Worksite Examination Requirements ............................................................................. 26
4.2
Restrictions on Hot Work in Hazardous Zones .............................................................. 26
4.3
Limits on the Amount of Work under an Area Authority ................................................. 27
Responsibilities of Persons Signing Permits ....................................................................... 28
5.1
People who Sign the Permit Documents ....................................................................... 28
5.2
Permit Applicant ............................................................................................................. 28
5.3
Responsible Supervisor ................................................................................................. 29
5.4
Area Authority................................................................................................................. 30
5.5
The Permit Holder .......................................................................................................... 30
5.6
Other Affected Custodian ............................................................................................... 31
5.7
Gas Tester...................................................................................................................... 31
5.8
PTW Multi-Roles (Licensed Personnel) ......................................................................... 32
How the Permit to Work System Operates .......................................................................... 33
6.1
The Permit Forms .......................................................................................................... 33
6.2
Applying for a Permit - Boxes 1 to 5 .............................................................................. 34
6.3
Authorisation and Coordination ...................................................................................... 38
6.4
Briefing of the Permit Holder .......................................................................................... 40
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6.5
Isolations ........................................................................................................................ 40
6.6
Vehicle Access - Box 8 .................................................................................................. 40
6.7
Co-ordination and Validation at the Issue Point - Boxes 9 & 10a .................................. 41
6.8
Acceptance by the Permit Holder - Box 10b .................................................................. 42
6.9
Actions after Validation .................................................................................................. 43
6.10 Briefing the Work Party – the Toolbox Talk ................................................................... 43
6.11 Supervision of the Work ................................................................................................. 44
6.12 Gas Test Record - Box 9 ................................................................................................ 44
6.13 Suspension of Work - Box 10c ....................................................................................... 45
6.14 Changeover of Personnel .............................................................................................. 46
6.15 Permit Re-validation - Boxes 10a & 10b ........................................................................ 47
6.16 Permit Cancellation - Boxes 11 a) and 11 b) ................................................................. 48
6.17 Permit Archiving ............................................................................................................. 49
6.18 Permit Processing Procedure ........................................................................................ 49
6.19 Permit Validation Exceptions ......................................................................................... 54
7
Control of Isolations ............................................................................................................. 55
7.1
Isolation Requirements .................................................................................................. 55
7.2
Electrical Systems .......................................................................................................... 55
7.3
Mechanical Systems ...................................................................................................... 55
7.4
Approval for Isolation ..................................................................................................... 55
7.5
Permits for Spading ........................................................................................................ 55
7.6
Unrecorded Isolations .................................................................................................... 56
7.7
Isolation Process ............................................................................................................ 56
7.8
More than One Permit in an Isolation Boundary ............................................................ 57
7.9
De-Isolation on Completion of Work .............................................................................. 57
7.10 De-Isolation for Testing .................................................................................................. 58
7.11 Transfer of Isolations between Permits .......................................................................... 58
7.12 Extended Period Isolations (EPIs) ................................................................................. 58
8
Permit Issue Points .............................................................................................................. 60
8.1
Location and Use of Permit Issue Points ....................................................................... 60
8.2
Purpose of Permit Issue Point Displays ......................................................................... 60
8.3
Permit and Isolation Display........................................................................................... 60
9
Use of the Work Tracking System ....................................................................................... 62
9.1
Objectives of the Work Tracking System ....................................................................... 62
9.2
Operation of the Work Tracking System ........................................................................ 62
10
Permit to Work System Certificates ............................................................................... 63
10.1 Certificates Provided ...................................................................................................... 63
10.2 Use of Certificates .......................................................................................................... 63
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11
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Hazard Management ...................................................................................................... 66
11.1 Objectives ....................................................................................................................... 66
11.2 Job HSE Plan ................................................................................................................. 66
12
Training and Licensing Of Permit to Work Signatories .................................................. 69
12.1 Training and Licensing of Personnel with PTW Roles ................................................... 69
12.2 Gas Testers .................................................................................................................... 69
12.3 Training Course Assessment Tests ............................................................................... 69
12.4 Training Records ............................................................................................................ 69
12.5 Licensing Policy ............................................................................................................. 69
12.6 Licensing of Permit to Work Signatories ........................................................................ 70
12.7 Persons Assessed under an Approved Competence Scheme ...................................... 73
12.8 License Cards ................................................................................................................ 73
12.9 Re-Licensing .................................................................................................................. 74
12.10 Refresher Training ......................................................................................................... 74
13
Permit To Work Monitoring, Auditing And System Review ............................................ 76
13.1 Definitions ....................................................................................................................... 76
13.2 Objectives ....................................................................................................................... 76
13.3 Monitoring of the Permit to Work System ...................................................................... 76
13.4 Auditing of the Permit to Work System .......................................................................... 77
13.5 Review of the Permit to Work System ........................................................................... 81
13.6 Permit to Work System Audit Forms .............................................................................. 82
14
Change Management ..................................................................................................... 90
14.1 Proposals for Change to the Permit to Work System .................................................... 90
15
Details of PTW System Operation ................................................................................. 91
15.1 Fault Finding................................................................................................................... 91
15.2 Construction Work .......................................................................................................... 91
15.3 Seismic Work ................................................................................................................. 92
15.4 Geomatics Survey Work ................................................................................................ 93
15.5 Pipeline Work ................................................................................................................. 94
15.6 Work In Operational Areas ............................................................................................. 94
15.7 Terminal Operations ..................................................................................................... 100
15.8 Government Gas Operations ....................................................................................... 101
15.9 Electrical Safety Rules and PTW Interfaces ................................................................ 102
15.10 Permits to Work for ESP Activities ............................................................................... 103
15.11 Permits To Work On Drilling Rigs ................................................................................ 104
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Appendix 1 – Class A Permit to Work ....................................................................................... 109
Appendix 2 – Class B Permit to Work ....................................................................................... 110
Appendix 3 - Mechanical Isolation Certificate & De-Isolation for Test Record Sheet ............... 111
Appendix 4 – Confined Space Entry, Additional Gas Test Record, Record of
Personnel Entry and Exit ........................................................................................................... 113
Appendix 5 – Access Authorisation Form ................................................................................. 115
Appendix 6 - Excavation Certificate .......................................................................................... 116
Appendix 7 – Radiography Certificate....................................................................................... 117
Appendix 8 – Clearance Certificate for Work in the Vicinity or Passage Under O/H Lines ...... 118
Appendix 9 - Definitions and Abbreviations .............................................................................. 119
TABLES AND FIGURES
Figure 3.1 – No Permit Job ......................................................................................................... 25
Table 4.1 – Work Examination Requirements ............................................................................ 26
Table 5.1: PTW System Roles .................................................................................................... 28
Table 5.2 - Roles that May be Carried out by Licensed Personnel ............................................ 32
Table 5.3 - Roles that can be Filled by Any One Person on a Single Permit ............................. 32
Figure 6.1 – Permit Life Cycle ..................................................................................................... 34
Figure 11.1 – Job HSE Plan Process ......................................................................................... 67
Figure 11.2 – Job HSE Plan (Example) ...................................................................................... 68
Table 12.1: PTW Training and Licensing Requirements ............................................................ 69
Figure 12.1 - Knowledge and Competence for Permit Activities ................................................ 70
Table 12.2 - Licensing Assessment Teams ................................................................................ 72
Figure 12.2 - Licence Application / Notification ........................................................................... 75
Table 13.1: Audit Structure ......................................................................................................... 78
Table 14.1 Proposals for Change to the Permit to Work System ............................................... 90
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Executive Summary
The petroleum industry handles large quantities of flammable and toxic materials, so the
potential for serious accidents is clear. To prevent these accidents, it is vital that there are safe
systems of work operating.
When incidents do occur, human factors, such as failure to implement procedures properly, are
often a root cause. These failures may, in turn, be attributable to a lack of training, instruction or
understanding of either the purpose or practical application of the Permit to Work (PTW)
system.
A Permit to Work (PTW) system does not exists simply to provide permission to carry out a
hazardous job. It is an essential part of a system, which determines how that job can be carried
out safely. The Permit is regarded as a statement that all hazards and risks have been
eliminated from or controlled in the work area. The issue of a Permit does not, by itself, make a
job safe. That can only be achieved by those preparing for the work and those carrying it out.
The PTW system ensures that authorised and properly trained people have thought about
foreseeable risks and that these are avoided by using suitable precautions. Those carrying out
the job think about and understand what they are doing and how their work may interface with
that of others. They must also take the necessary precautions which they have been trained to
take and for which they have been made responsible.
The PDO PTW System exists to protect people, assets and the environment from damage. The
PDO PTW Manual describes the PTW system (how Permit work is identified, approved and
controlled) and outlines the details necessary for all personnel involved in the PTW system to
carry out their work safely and with proper regard for the environment. More specifically, parts of
the Manual address the following:
Section 1
Outlines the scope and objectives of the PTW system
Section 2
Outlines responsibilities of the PTW Custodians, Focal Points and others
Section 3
Defines types of Permits available & activities for which a Permit is required
Section 4
Outlines worksite examination requirements, restrictions on Permit work
Section 5
Outlines responsibilities of persons involved in operating the PTW System such
as the Permit Applicant, Responsible Supervisor, Area Authority, Permit Holder
and Authorised Gas Tester
Section 6
Describes the operation of the PTW system
Section 7
Outlines the requirements for the control of isolations
Section 8
Describes requirements for Permit issue points
Section 9
Outlines the use of the work tracking system
Section 10
Describes the Permit to Work certificates required and how these are to be
used
Section 11
Describes the hazard management process (primarily Job HSE Plans)
Section 12
Outlines the training and licensing requirements of the PTW system
Section 13
Outlines the PTW system monitoring, auditing and system review
Section 14
Describes how to forward suggestions for improving the PTW system
Section 15
Further details of the PTW system operation
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1
PDO Permit to Work System
1.1
Scope
Revision 6.1
Effective: Dec-08
This Permit to Work (PTW) System Manual shall be used in all areas under the control
of PDO.
The Manual explains the “Principles of Permitry” and defines activities for which a
Permit to Work is required. It also states how Permits are approved and controlled.
Section 15 of the Manual gives detail guidance on how the PTW System shall be used
in specific work situations.
Permits are issued by PDO for work in areas where there may be a hazard to
Personnel, Asset, or Environment. These hazards may not necessarily be related to
hydrocarbons. Safety requirements for work in non-hydrocarbon areas are described in
other relevant HSE procedures within PDO.
1.2
Objectives
The PDO Health, Safety and Environmental Management System Manual states that
the Company will endeavour to protect the health and safety of personnel protect the
environment and provide a safe and healthy workplace. The PTW System is an
important part of the way that PDO meets the requirements of this Policy.
The Objective of the PTW system is “To provide a system to ensure that non-routine,
hazardous activities can be worked on in a safe manner”.
To achieve safety at the workplace, the PTW system must ensure that everyone is
aware of the hazards involved in their work, and of the precautions they must take to
work safely.
To help ensure this, the Permit to Work System requires:
Training:
To ensure everyone understands the PTW System and how
to use it.
Licensing:
People signing Permits must be tested to ensure they
understand the System and have sufficient knowledge of
hazards and controls to manage safe working.
Planning:
To ensure that work is well planned, with the workforce and
equipment prepared for the job.
Work Definition:
To ensure that everyone understands the work content, and
how and where it shall be done.
Hazard Management:
To ensure that the hazards involved in the work are identified,
and the precautions and personal protection required for a
task are correctly defined.
Co-ordination:
To prevent conflicting activities from being authorised.
Communication:
To ensure that all personnel understand the work content and
the Job HSE Plan.
Authorisation:
Formal approval to do the work.
Supervision:
Providing a person in charge of each work site, who is
responsible for ensuring that work party complies with the
requirements of the Permit to Work.
Briefing:
Toolbox Talks at the worksite to discuss the job, how it will be
done, and the precautions required.
Discipline:
To ensure that everyone knows that they must comply with
Permit requirements.
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Housekeeping:
To ensure that the work site is kept clean and safe at all
times.
Verification:
An audit programme to help ensure that the requirements of
the Permit to Work System are being met in all areas of PDO.
Improvement:
A Proposal for Change programme, together with audits, to
ensure that the system is improved whenever necessary.
For all work covered by a Permit, it is important that everyone
associated with the job:
Understands:
The work content and how it will be done.
The hazards involved, and precautions that are required.
The work area, hazards that may be present there and the
precautions required.
Any emergency actions that may be necessary.
Their own responsibilities, and
Complies:
With all the requirements of the Permit to ensure the
continued safety of personnel, plant and equipment.
REMEMBER, JUST HAVING A PERMIT IS NOT ENOUGH TO MAKE A JOB
SAFE - YOU MUST COMPLY WITH THE REQUIREMENTS OF THE PERMIT
AND ITS ASSOCIATED JOB SAFETY PLAN.
1.3
Changes to the Document
Responsibility for the upkeep of the Document shall be with the Functional Production
Team Leader UOP, the Owner. Changes to this document shall only be authorised and
approved by the Owner.
Users of the Document who identify inaccuracy or ambiguity can notify the Custodian or
his/her delegate and request changes be initiated. The Requests shall be forwarded to
the Custodian.
The Document Owner and the Document Custodian should ensure review and reverification of this procedure every 1 year.
1.4
Step-out Approval
This procedure is mandatory and shall be complied with at all times. Should compliance
with this procedure be considered inappropriate or the intended activity cannot be
effectively completed or safely performed, then step out authorisation and approval
must be obtained in accordance with PR-1001e – Operations Temporary Variance, prior
to any changes or activities associated with the procedure being carried out.
Additionally in the case of Permit to Work the request shall be formally agreed and
endorsed by the PTW Manager (UOP7)
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2
Management of the Permit to Work System
2.1
System Custodian and Focal Points
Revision 6.1
Effective: Dec-08
The PTW System Corporate Custodian is the Production Function Permit to Work
Manager (UOP/7). UOP/7 is responsible for providing steering/direction to ensure that
the PTW System meets the needs of PDO. This role is also responsible for
implementation support and coordinating system maintenance
The PTW Training Custodian is UOP/7 who is responsible for the content and suitability
of PTW training.
Asset Directors are responsible for the implementation of the PTW System, and for
appointing Focal Points for the PTW System in each Area.
2.2
Responsibilities of the System Custodian, OXO/2 and Focal Points
2.2.1
PTW System Custodian
The Responsibilities of the PTW System Custodian are:
2.2.2

To be the Corporate focus within PDO for the content of the PTW System.

To maintain a high standard of quality and content for all PTW System
documentation.

To ensure that the system in place delivers the necessary documentation to
users.

To define the requirements for PTW System Hardware, including Permit Racks,
Location Boards, Isolation Hardware, etc.

To be the corporate focus for Area Focal Points to submit proposals for change
to the System, reviewing and incorporating these annually.

To control revisions to the PTW System, consulting with user Departments
about any changes that will be made.

To ensure that briefings are delivered on any changes to the System.

To ensure that auditing is being done in accordance with the defined audit
scheme.

To approve functional specs for computer systems used as part of the PTW
System.

To provide training to PTW Focal Points.

“Helpdesk” support.

Implementation support and system maintenance.
OXO/2
The responsibility of the OXO/2 position is:
 Provide Audit support
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2.2.2
Revision 6.1
Effective: Dec-08
OXO1X
The responsibility of the Delivery Team Leader (DTL) position is:
2.2.3

To initiate Area Audit programs

Provide Implementation support

Ensure compliance with the PTW system in their area of operation
HSE Mandated Training Focal Point
The responsibilities of the HSE Training Focal Point are:
2.2.4

To manage QA/QC for PTW training.

To manage the Contractual issues around PTW Training
PTW Training Custodian
The responsibilities of the PTW Training Custodian are:
2.2.5

To define the requirements for PTW Training Courses and their content.

To maintain the required standard of course delivery.
Focal Points
The responsibilities of the PTW Focal Points within each area are:
Page 14

To provide local implementation support.

To ensure PTW Audits are being done in an effective manner.

To be the local focal point for proposals for change to the system.
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3
Work That Needs a Permit to Work
3.1
What is a Permit to Work system?
Revision 6.1
Effective: Dec-08
A Permit to Work system is a formal documented system used to control work which
has been identified as potentially dangerous. It is also a means of communication
between site management, supervisors, operators and those who carry out the work.
A PTW system aims to ensure that proper planning and precautions are taken with
hazards to control the risk of a particular job. The permit is a written document which
authorises certain people to carry out specific work at a certain time and place. The
permit sets out the precautions needed complete the work safely.
There are two types of Permits. These are described in Section 3.2 of this document.
3.1.1
Principle of Permitry
The "Principle of Permitry" is the process used to determine whether a job needs a
Permit to Work or not.
Prior to any work commencing, the Responsible Supervisor and the Permit Applicant
are to discuss the job/s to be executed and, using the process flowchart below,
determine whether a PTW is required or not. Their determination shall be verified by
the Permit Signatories.
This is a MANDATORY requirement to determine "WHEN A PERMIT IS
REQUIRED":
ANALYSE THE WORK
TO BE CARRIED OUT
o
o
o
o
IS WORK WITHIN PROCESS FACILITIES?
IS WORK WITHIN HYDROCARBON AREA?
IS WORK ON ELECTRICAL INSTALLATION?
IS WORK IN A CONFINED SPACE?
NO TO ALL
o
o
o
o
IS WORK FAMILIAR TO WORK FORCE?
IS WORK TO BE CARRIED OUT BY COMPETENT STAFF?
IS WRITTEN PROCEDURE AVAILABLE FOR WORK?
IS SUPPLEMENTARY CERTIFICATE NOT REQUIRED FOR
WORK?
YES TO ANY
PERMIT REQUIRED
FOR WORK
NO TO ANY
YES TO ALL
PERMIT NOT
REQUIRED FOR WORK
NOTES:
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1.
Revision 6.1
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Work without a permit shall not start without the following:a. A Job HSE Plan for the work
b. Diligent supervision on site
c.
3.1.2
A completed “No Permit Job” form signed by the work site Supervisor and
authorised by the relevant responsible supervisor
2.
Written procedures can vary in length, but need to be specific for the job, cover
the hazards identified and the control measures required. These need to be
endorsed and approved by the Team Leader or Manager.
3.
If the job is able to be completed without a Permit, the Work Site Supervisor
must submit a signed “No Permit Job” form to the Responsible Supervisor. The
Responsible Supervisor shall authorise the form before any work can begin.
Please refer to Figure 3.1 at the end of this Section for a copy of the “No Permit
Job” form.
Hazard and Risk Assessment
A critical element of the Principle of Permitry and PTW preparation stage is an
assessment of the hazards, threats and risk which are associated with the work to be
undertaken. The techniques of the Hazard and Effect Management Process (HEMP)
shall be applied which helps the assessor to:
IDENTIFY
Understand the hazards and threats associated with the work (What are the impacts to
people, assets, environment or reputation? Obtain precise details of the work to be
undertaken. Are there 'process' hazards or hazards associated with the material being
handled involved in the work?)
ASSESS
Recognise the risks (What are the likelihood to cause harm? Is the risk involved as low
as reasonably practicable -ALARP? Consider the practical difficulties of carrying out the
work, if necessary consulting the discipline specialists undertaking the work)
CONTROL
Decide upon the barriers and control necessary to manage the risk thus providing a
safe working environment (What is required to prevent the likelihood of causing harm
from carrying out the work being realised? Are there any safer alternatives either in
terms of timing, or the intended method of performance of the work) and
RECOVER
Agree on the recovery measures in the event that controls break down. The Permit
Applicant should carry out such assessment in conjunction with his workforce and any
other persons whose specialist knowledge may be needed. Where available the Permit
Applicant will take advantage of all hazard information in Part 5 of the Safety Case. This
will assist him in recognising hazards, threats, risks, barriers and precautions needed
and response mechanism should controls breakdown. Likewise the Responsible
supervisor and the Area Authority should also undertake such assessment when the
permit is presented to further enhance safety control, if needed.
NOTE: Section 11 of this procedure explains in details how to prepare Job HSE plan
based on Risk assessment.
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3.2
Types of Permit
3.2.1
Class A - Red Edged Permits
Class A Permits (refer to Appendix A) are required for high risk work. This is work that
could lead to major consequences such as fire, explosion, or loss of life.
Class A Permits requires:
3.2.2

72 hours notice, except for essential unplanned work.

A Job HSE Plan to be completed, and attached to the Permit, and prominently
displayed at the worksite. A copy should be placed with the permit in the permit
rack.

Worksite examination by the Responsible Supervisor and Permit Applicant
before the Responsible Supervisor Authorises the Permit. (see 4.1)
Some areas have more than one person licensed as a Responsible Supervisor.
It is quite acceptable for the duty Responsible Supervisor to delegate site visits
to another person who holds a Responsible Supervisor licence.

Daily Validation of the Permit by the Area Authority. The Area Authority must
examine the worksite each day before Validating a Permit for work inside a
Process Facility. The Area Authority must examine the worksite on the first day
for work in Hydrocarbon Areas; however, this may be delegated to an
Authorised Gas Tester (AGT) at the discretion of the Responsible Supervisor.
(see 5.7)

Tracking in the Work Tracking System.
Class B - Blue Edged Permits
Class B Permits (refer to Appendix B) are required for medium risk work.
Class B Permits require:
3.3

24 hours notice, except for essential unplanned work.

A Job HSE Plan to be completed. Copies of the Job HSE Plan shall be
attached to the Permit taken to site and also to the Permit placed in the permit
rack.

Authorisation by the Responsible Supervisor.

For work inside a Process Facility, a worksite examination by the Area Authority
before Validation on the first day (see 4.1)

Daily Validation of the Permit by the Area Authority.

Tracking in the Work Tracking System.
Location of Work
The type of Permit required for a job depends on the hazards resulting from:

The type of work that shall be done.

The area in which the work will be done.
Within PDO’s operations, three types of area have been defined in order to allow PTW
controls to be appropriate for the level of risk.
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Process Facilities
The area within the boundary fence of any hydrocarbon processing facility, including:

Gathering and Pumping stations.

Terminals.

Other fenced hydrocarbon storage or processing areas.
In addition the level area around a wellhead (well location) is classed as a Process area
for permit classification purposes, when the well is live.
NOTE: If the well is mechanically plugged and the flowline disconnected and blanked,
the classification can be relaxed to a Hydrocarbon Area.
3.3.2
Hydrocarbon Areas
Areas outside the boundaries of Process Facilities where hydrocarbons are, or have
been present. These include:
3.3.3

Areas outside Process Facilities, but within 50m of the boundary fence.

Areas within 50m of an exposed section of flowline/pipeline which has flanged
joints.

Work within 10m of a gas pipeline whether or not it touches the line.

Areas within 100m of a drilling rig for work by non drilling personnel.

Area around a well site (well location) when the well is not classed as a Process
Area as in 3.3.1
Non Hydrocarbon Areas
These are areas where hydrocarbons never have been present. They include:

Areas of land outside Process Facilities and Hydrocarbon Areas, including
construction sites for new facilities until hydrocarbons are first introduced and
the areas surrounding fully welded pipelines and flowlines.

Work by electrical personnel in electrical switching stations and on power
distribution systems, done in accordance with ESRs.

Administration, recreation or accommodation buildings, including work on
domestic gas and electric systems.

Work in laboratories and medical facilities.
NOTE: It is important to understand the differences between the areas mentioned
above, Hazardous Areas and Restricted Areas, all of which are mentioned in the PTW
Manual.
The Hazardous Areas (Zones 0, 1 and 2), defined in Hazardous Area drawings, relate
to the likelihood of presence of hydrocarbons. Hazardous Areas will lie within either a
Process Facility or a Hydrocarbon Area. However, not all parts of a Process Facility or
Hydrocarbon Area will be a Hazardous Area (e.g. control rooms are sited in nonhazardous areas).
Process Facilities will all be Restricted Areas. However, some Restricted Areas are not
Process Facilities (e.g. Telecom facilities).
3.4
Activities Requiring a Permit
The Table in 3.6.1 shows the Activities that require Class A and Class B Permits in
Process Facilities and Hydrocarbon Areas.
For Example:
Grinding in a Process Facility
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Class B Permit
The Table in 3.6.2 shows the Activities that require Class A and Class B Permits for
work in areas controlled by Electrical Departments.
Work in other areas may require a Permit. See 3.7 for more details of how work in
these areas is controlled.
When the work on a Permit involves two or more different Activities:

If any Activity requires a Class A Permit, a Class A Permit is required for the
overall job.

All Activities are to be listed on the Permit.

The Job HSE Plan must show the controls required for all the Activities.

A Permit should not include so many Activities that it is difficult to understand
the controls needed for each stage of the work. If the work is complex, it may
be better to use separate Permits for each part of the job.
Where personnel not on the normal access list require entry to a Process Facility for a
visual inspection only, an Access Authorisation Form (refer to Appendix 4) may be
used. Guidance on how to use this form can be found in the Access Control Procedure,
SRD/P/08.
A Responsible Supervisor may sometimes require a Permit to Work for activities that
would not normally require it, in order to ensure safe working.
3.5
Gas Test Frequency
3.5.1
Confined Spaces
For entry to confined spaces, gas testing is required before entry and at the start of
each shift; reference should be made to PR-1148 – Entry in to a Confined Space for
more details.
3.5.2
H2S Areas
In H2S Areas testing and monitoring for H2S is required in accordance with PR-1078 –
Hydrogen Sulphide Management and PR-1154 Gas Testing Procedure.
3.5.3
Testing for Hot Work
The Table in 3.6 shows the recommended frequency for Gas Testing for Hot Work.
Responsible Supervisors and Area Authorities may wish to test at intervals differing
from the guidance, where conditions require this. In addition there are some categories
of work which require continuous gas monitoring for the duration of the job.
The basic principle of the guidance is that a gas test should be done before starting
work each day, and after each period away from the worksite of more than 1 hour (e.g.
lunch.) In addition, a test should be done every 2 hours for work that may cause flames
or sparks done in Process Facilities where significant quantities of gas are present.
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3.6
Type of Permit Required
Class A Permit Required
Class B Permit Required
HSE Plan Required (No Permit Documentation)
Gas Test to be done before starting work each day, and after each period away from the
worksite of more than 1 hour
Gas Test every two hours in areas where significant quantities of gas may be present
3.6.1


Work in Areas where Hydrocarbons may be Present.
Activity.
Location of Work
Process Facility
Hydrocarbon Area
1.
1.1
Burning, Welding and Grinding
Welding (Gas) / Oxy-Acetylene cutting (Hot
Work)
1.2
Welding (Arc) (Hot Work) (See 15.6.1)
1.3
Grinding (Hot Work)
2.
Confined Space Work
2.1
Confined Space Entry, except for Well Cellars
Continuous +
and Casasco pits. Note-Gas testing in +
monitoring
accordance with PDO policy is required. (See
3.5.1)
Entry into Well Cellars (See 15.6.3) and


Casasco Pits (See 15.5.2)
Electrical Work and Work in Electrical Areas
(See Section 15.8)
Work requiring an electrical safety document as
specified in Electrical Safety Rules (ESRs)
The opening of live electrical junction boxes by

Electrical Authorised Persons (Hot Work)
Handling Hazardous Substances
2.2
3.
3.1
3.2
4.
4.1
4.2
4.3
4.4
5.
+

+

+

Continuous
monitoring

Continuous
monitoring

Continuous
monitoring

Continuous
monitoring
Handling substances hazardous to health, e.g.
toxic chemicals or asbestos
Use of Radioactive sources (See 15.6.8)
Contamination
with
Naturally
Occurring
Radiation Material (NORM)
Working with Pyrophoric Scale (except for scale
encountered during pigging operations)
Work on Safety Systems (See 15.6.1)



5.1
Work that affects the availability of ESD & F&G
Systems
5.2 Work that affects the availability of Process and
Machinery control systems
6.
Mechanical Maintenance Activities (See Section
15.6)
6.1 Work that involves cutting pipe on systems + Continuous
monitoring
containing hydrocarbons or hazardous fluids
6.2
6.3
6.4
Page 20
Work that involves unbolting flanges on systems
containing hydrocarbons or hazardous fluids
Grit Blasting (Hot Work)
Power/hand tools (except grinders) that may
create a spark between surface and tool (Hot




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Activity.
Work)
6.5 High Pressure (HP) water jetting
6.6
Painting (hand and spray) (See 15.65.17)
6.7
Engineering and routine/corrective maintenance
work which does not involve unbolting flanges or
cutting into systems which have contained
hydrocarbons or hazardous fluids.
Work in authorised workshops located in nonhazardous areas.
Leak clamping of oil/gas flowlines
6.8
6.9
Location of Work
6.10 Beam pump/PCP maintenance activities (See
15.6.2)
6.11 Polyethylene lining of pipelines and flowlines


6.12 Vacuum tanker discharge inside a process area. + Continuous
(See 15.6.6)
monitoring
6.13 Suction tanker operations inside a process area.

(See 15.6.6
6.14 Engineering and routine/corrective maintenance

work which involves the use of lifting equipment
7.
Work at Height
7.1
8.
Working where a person may fall more than 2
metres, except on approved walkways and
scaffolds
Scaffolding Activities
8.1
Erection or dismantling of scaffolding


N/A
9.
Operations using Cranes and other Heavy
Machinery
9.1 Operations where heavy machinery e.g.
cranes/crane loads, mechanical excavators,
trucks etc. could pass over, or come into contact
with, live hydrocarbon systems or overhead
power lines. (See 15.5.1 for work close to
pipelines). Gas testing requirements as per 11.1
10. Systems
and
Equipment
Testing
and
Commissioning / Decommissioning
10.1 Pressure testing of plant and equipment
10.2 Commissioning Systems and Equipment
10.3 Decommissioning
11. Use of non-certified equipment in Hazardous
Areas
11.1 Use of Temporary Diesel Engines in hazardous
areas (excluding vehicle access, but including
use of a mobile crane) (Including refuel
operations)
11.2 Use of non-Intrinsically Safe equipment (Hot
Work)
11.3 Use of Intrinsically Safe
test / portable
equipment
11.4 Use of cameras (Hot Work). Providing a gas
detector is carried by an AGT, and flash
requirements included on the access permit
12. Civil Works
+


+

Continuous 
monitoring
 
Continuous
monitoring
12.1 Excavation. (Hand excavation to 300 mm depth
is required in areas where pipes or cables may
be present) (See 15.6.7)
12.2 Rebar cutting, bending and shuttering (form work)
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Activity.
and concrete pouring
12.3 Engineering construction activities, not involving
welding, burning or grinding (See Section15.2.)
13. Operational Activities
Location of Work
13.1 Production operations including routine checks
and visual inspections by the Area Authority
which require blowing down or sampling of
hydrocarbons (providing an approved Operating
Procedure is being followed)
13.2 Routine, documented drilling activities. (See
Section15.11)
N/A
Hydrocarbon Area
requirements may apply
See 3.3.2
13.3 Well Services operations at locations where
other groups are also working, or where well site
custodianship has not been transferred to the
Well Services department. (See 15.6.16)
13.4 Drilling Water Services activities listed in
Procedure DWSOP No P033
Use Pigging
Use Pigging
13.5 Pipeline pigging operations covered by
Authorisation Form
Authorisation Form
authorised procedures & listed in approved
programme, including vehicle access to pig trap
area.
13.6 Operation of permanently installed approved
equipment which produced an ignition source or
open flame when it operates.
13.7 Seismic exploration activities. (See Section 15.3) 

See Section 15.6
13.8 Terminal Operations.
See Section 15.7
13.9 Government Gas Operations.
13.10 Geomatic Survey (See Section 15.4)

14. Inspection Work
14.1 Entry to Restricted Areas, for viewing purposes
only, by personnel not on the access list for that
Area.
15. Roadway Work
15.1 Levelling and grading using machinery
No Permit Required.
Use Access Control
Form
N/A
Hydrocarbon Area
requirements may apply
See 3.3.2
16. Faultfinding
16.1 Minor Fault finding work. This may include the
controlled isolation and de-isolation of valves,
the removal of instruments for calibration,
blowing through of pneumatic relays or other
routine minor activities. (See 15.1)
17 ESP Activities
Hazardous Area
(Zon2 1 or 2)
17.1 Meggar Testing HV – See E1.1
Replacing Pig Tail at Wellhead (Isolated)
Fluid Shot
Electrical Isolation - HV
Commissioning ESP, ESPCP & PCP (Will require
gas test if breaking hydrocarbon envelope)
17.6 Trouble shooting ESP, ESPCP, & PCP
(Controlled under ESRs. See E1.1 No Permit
Job to be signed by Electrical Supervisor)
17.7 ESP Powered by Generator (Controlled by ESRs
See E1.1)
Intrinsically safe
Equipment to be used
No Permit Required.
Controlled by ESR’s
N/A
N/A
Activity Controlled by ESRs
17.2
17.3
17.4
17.5
Page 22
Non Hazardous Area
No Permit Required.
Controlled by ESR’s
PR-1172 – Permit to Work System
No Permit Required.
Controlled by ESR’s
No Permit Required.
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3.6.2
Type of Permit Required in Electrical Installations owned by Power Systems Operations
The type of Permit required depends on whether the work is in a Zone 1 or 2 of a
Hazardous Area, e.g. near fuel gas systems or in a non-hazardous area.
Activity.
Location of Work
Hazardous Area
(Zone 1 or 2)
E1.
E1.1
E1.2.
E1.3.
E1.4.
E1.5.
Work in Electrical
Installations (See
Section15.8)
Work requiring an electrical safety document as 
specified in Electrical Safety Rules (ESRs)
(Activity 3.1)
No Permit Required.
Periodic Electrical lnspections at unmanned
Controlled by ESR’s
substations and power stations as per ESRs and
Electrical Safety Operating Procedures (ESOPs),
carried out by Power Systems Operations own
contractor staff.
All construction activity such as excavation work,
civil and electrical work, lifting operations using 
crane, shot blasting and painting etc. by third
party or PDO supervision. (Use equivalent
Activities from 3.6.1)
Third party periodic visits to electrical substations
and power stations e.g. Telecoms/SCADA, Area
Services for routine electrical work.
Live Line Washing on overhead lines to process

field facilities with or without auto-reclosers.
E1.6
The Opening of Live Electrical Junction Boxes 
by Electrical Authorised Persons (Hot Work)
(Activity 3.2)
E1.7. Low Voltage (LV) work requiring an electrical 
safety document as specified in ESRs
E1.8 Non electrical work in electrical switchrooms,

power stations or near overhead lines
E1.9 Electrical Switching controlled by ESOPs and
ESRs.
E1.10 Electrical Maintenance Activities at unmanned
substations and power stations as per ESRs and 
ESOPs, carried out by Power Systems
Operations own and contractor staff.
E1.11 Non-routine electrical work in power stations and
substations, carried out by Power Systems 
Operations own contractor staff.
E1.12 Non electrical work in power stations and
substations, carried out by Power Systems 
Operations own contractor staff.
3.7
Non Hazardous Area
No Permit Required.
Controlled by ESR’s
No Permit Required.
Controlled by ESR’s
No Permit Required.
Use Access Control Form
No Permit Required.
Use Limitation of Access
(LOA)
No Permit Required.
Controlled by ESR’s
No Permit Required.
Controlled by ESR’s
No Permit Required.
Use Limitation of Access
(LOA)
No Permit Required.
Controlled by ESR’s
Work in Other Areas under the Control of PDO
Work in areas under the control of PDO other than Process Facilities, Hydrocarbon
Areas and Electrical Installations may not require a Permit to Work. For a Permit not to
be required, certain additional job criteria also need to be met (e.g., familiar work,
written procedure available, competent staff, etc). In addition, certain job requirements
must be complied with before the work can start without a PTW (e.g., Job HSE Plan in
place, TRIC card completed, diligent supervision, etc). Refer to 3.1.1 “Principle of
Permitry” for further details.
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It is worth emphasising, that within PDO operating areas, Job Hazard Analysis shall be
applied and Job HSE Plans put in place for any task which could adversely affect the
health and safety of personnel, environment or plant and where the hazards and control
measures need to be assessed.
Contract Holders should ensure that Contractors HSE management measures include
suitable safe systems of work, which may include the operation of their own Permit to
Work Systems.
3.8
Other Work
For any work not shown in the tables above, the hazards involved in the work are to be
assessed by the Permit Applicant and Responsible Supervisor, and a Permit of the
most appropriate Class shall be raised. The PTW System Custodian shall be advised if
there is a need to include an additional Activity into the PTW system.
Contract Holders should ensure that Contractors HSE management measures include
suitable safe systems of work, which may include the operation of their own Permit to
Work Systems.
3.9
Work in Areas Not Under the Control of PDO
On occasions where PDO personnel (or contractors to PDO) are to perform work in
areas not under the control of PDO, the following guidelines will apply:
The Permit to Work system of the asset owner shall be complied with.

PDO’s Responsible Supervisor or Area Authority shall countersign the Permit to
Work issued and include additional conditions (if required).
If the Permit to Work issued by the asset owner is considered to be inadequate and is
not able to be modified to the satisfaction of PDO personnel, then work is not to be
allowed to commence.
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NO PERMIT JOB
Number:_______________________
Work Description:
Location:_____________________________________________________
A. Questions Regarding Hazardous Areas
1. Is the work within the facilities?
YES
NO
2. Is the work within a hydrocarbon area?
YES
NO
3. Is the work in/ on electrical installations?
YES
NO
4. Is the work in a confined space?
YES
NO
If any of the questions above has a YES answer then a Permit to Work is required
B. Questions Regarding Type of Work to be Done
1. Is the work familiar to the work force?
YES
NO
2. Is the work going to be undertaken by competent staff?
YES
NO
3. Is there a written procedure for the work?
YES
NO
4. Is a supplementary certificate NOT required for the work?
YES
NO
If any of the questions above has a NO answer then a Permit to Work is required
C. No Permit Job Requirements
1. Job HSE Plan been written for the work
YES
NO
2. Work Site Supervisor appointed for the work
YES
NO
Name of appointed Supervisor
If a Job HSE Plan has not been written or a Supervisor is not named, then a Permit to
Work is required.
Work Site Supervisor
Responsible Supervisor
Name:
Name:
Date:
Date:
Approved:
Approved:
NO PERMIT JOB can only start when the above have been completed and signed by all parties
Figure 3.1 – No Permit Job
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4
Worksite Examination and Restrictions on Permit Work
4.1
Worksite Examination Requirements
The requirements for inspecting worksites before work starts are as set out in Table 4.1
below.
Table 4.1 – Work Examination Requirements
Permit Type
Examination by
Permit Applicant &
Responsible
Supervisor
Examination by Area Authority
Process Facility
Hydrocarbon Area
Before Authorisation
First Day
Every Day
First Day
Every Day
CLASS A
YES**
YES
YES
YES
NO*
CLASS B
NO
YES
NO
NO
NO
* - Except where a Gas Test is required, as the Area Authority may wish to do the first Gas Test
each day for Class A permits, otherwise he may delegate to an AGT (see 4.7.1 pre-validation)
** - The requirement for a worksite visit by Responsible Supervisor and Permit Applicant can be
relaxed for certain tasks at the discretion of the Production Co-ordinator, and following a Risk
Assessment being completed. In addition the Responsible Supervisor may delegate the worksite
inspection to another person licensed as a Responsible Superviosr for that area.
4.2
Restrictions on Hot Work in Hazardous Zones
Hot Work is not allowed in areas classified as Hazardous Zone 0 or Hazardous Zone 1,
unless absolutely essential. Hot Work includes all open flame work and other work that
may cause sparks, such as grinding, electrical work or vehicle entry.) Responsible
Supervisors must ensure that all other ways of doing the job are impractical before
allowing Hot Work in these zones.
If all alternatives to Hot Work as a means if carrying out an activity in an area classified
as Zone 0 or Zone 1 have been considered and ruled out as impractical, the following
action must be taken:

The process system(s) which resulted in the area being classified as Zone 0 or
1 must be shut down, isolated and de-pressurised, so that the hazard which
caused the area to be classified as Zone 0 or Zone 1 is removed for the period
of work.

If specifically approved by the Responsible Supervisor, a pressurised habitat
may be built to create a sub-environment within an otherwise Zone 1 area
where Hot Work may be done without creating a fire hazard. The habitat must
be examined before use and approved by the Area Authority, Responsible
Supervisor, and Production Co-ordinator continous gas monitoring shall be
required.

A Job HSE Plan shall be produced identifying all hazards, and the controls
required to prevent an incident. A Class A Permit is then to be raised and the
work carried out in accordance with the requirements of the Job HSE Plan.
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4.3
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Limits on the Amount of Work under an Area Authority
The maximum number of Permits that can be allowed under the control of one Area
Authority is:

6 Validated Class A Permits at any one time;

14 Validated Permits in total (Class A + Class B.)
The maximum number of permits that is allowed under the control of one Area Authority
can be adjusted at the discretion of the Responsible Supervisor, in conjunction with the
Area Authority and following a risk assessment. Alternatively, extra Area Authorities
may be provided. Also, under their discretion, Responsible Supervisors can limit the
size or number of working crews under the control of one Area Authority.
If an additional Area Authority is provided, he must remain at the work location
whenever more Permits than allowed by the limits above are validated.
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PR-1172 – Permit to Work System
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5
Responsibilities of Persons Signing Permits
5.1
People who Sign the Permit Documents
Table 5.1 below lists the licensed roles in the PTW System, and the job titles of people
who normally sign in each role.
Table 5.1: PTW System Roles
Role in PTW System
Permit Applicant
Examples of Job Titles
PDO Supervisor
Contractor Supervisor
Responsible Supervisor
Production Supervisor
PDO Site Representative
Utilities Foreman
Area Authority
Station Operator
Inspectors
Utilities Technician
Permit Holder
PDO Technician Contractor
Foreman
Other Affected Custodian
PDO Supervisor
Authorised Gas Tester
Person licensed as Gas Tester.
Utilities Foreman
Normally, four different people will fulfil the roles of Permit Applicant, Responsible
Supervisor, Area Authority and Permit Holder. On some occasions (e.g. emergency
breakdown repairs) when it is difficult to provide four people, certain people may fulfil
two roles. See 5.8.
The responsibilities of each role are described in the paragraphs below.
5.2
Permit Applicant
For a new Permit the Permit Applicant must:
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
Fill in the Header and Box 1 of the Permit, including a clear Work Description,
and realistic planned start and completion times for the Work.

Fill in the Application section of any Certificates required with the Permit.

Produce a Job HSE Plan identifying work and location hazards, and necessary
controls. The worksite should be examined when producing the Job HSE Plan,
except for Class B tasks at remote sites where there are known to be no
location hazards, such as overhead/underground services.

If required by 4.1, examine the worksite with the Responsible Supervisor to
check that the Job HSE Plan includes all necessary controls.

Obtain the signature of an "Other Affected Custodian" when required.

Ensure that the Permit has been authorised by the Responsible Supervisor
before it is given to the Permit Holder. NO WORK may be done unless a
Permit is Authorised and Validated.

Ensure that there is a licensed Permit Holder in charge of the work for all
periods when work is being done under a Permit.

Ensure that the Permit Holder is briefed on the work, hazards and controls.
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When no more work will be done on a Permit, the Permit Applicant must ensure that the
Permit Holder signs the Permit in Box 11a and gives it to the Area Authority for
Cancellation.
Permit Applicants must inform the Responsible Supervisor in writing by 1600 hrs the
Permits which he requires Validating for the next day.
Information on the roles that a licensed Permit Applicant can fulfil are contained in 5.8.
5.3
Responsible Supervisor
The Responsible Supervisor is responsible for the co-ordination of Permit work in his
area, and for any worksite examinations required before Authorisation of a Permit.
For Class A Permits, the Responsible Supervisor must:

Examine the worksite, normally with the Permit Applicant, before Authorising
the Permit, to ensure that all hazards have been identified and controls
specified on the Job HSE Plan. He may however delegate this (see 3.2.1). In
addition this may be relaxed in certain cases – see 6.3.1

Decide whether it is necessary to restrict other work at the site while the Class
A work is being done.
When authorising any Permit, the Responsible Supervisor must:

Ensure that the work description is clear, complete and correct, discussing it
with the Permit Applicant where necessary.

Agree that the work should be done on this equipment at the proposed time.

Ensure that all hazards have been identified.

Review the Job HSE Plan to ensure that it includes the controls needed to
prevent harm to personnel, equipment and the environment.

Add to the Job HSE Plan any additional controls which are required for the
work.

Write on the Permit the time for which it is authorised for work.

Sign the Permit to Authorise it.
Each day, the Responsible Supervisor must give the Area Authority a list of the Permits
that he can validate that day. The Responsible Supervisor must have checked that
these jobs will not conflict with each other or with operational work. The Work Tracking
System printout should be used to do this.
A Responsible Supervisor shall ensure that another person taking over his
responsibilities is aware of the status of Permits in his area.
Information on the roles that a licensed Responsible Supervisor can fulfil are contained
in 5.8.
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5.4
Area Authority
The Area Authority is responsible for Validating a Permit before work starts. He will
normally do this at the Permit Issue Point for his area.
The Area Authority must obtain approval from the Responsible Supervisor before
validating any Permit which is not on the list given to him by the Responsible
Supervisor.
Before Validating a Permit, the Area Authority must:

Ensure that the worksite preparations shown on the Permit or Job HSE Plan,
including isolations, are in place.

If required by the Permit Box 4, examine the worksite before the start of work to
ensure that it is safe for work.

Ensure that the work will not conflict with other work in the area.

Confirm that conditions in the work area are still safe before each Validation of
the Permit.

Attend TRIC talks for activities he considers may hold a higher level of risk.
If, at any time, it is not safe for any work to continue, the Area Authority must stop that
work.
When work on a Permit is finished, or the Permit reaches the end of its Authorisation
period, the Area Authority must:

State on the Permit whether or not the work is complete

For work in Process Facilities, check that the worksite has been left in a safe
state.

When required, check that the equipment is operating correctly again.

Cancel the Permit.
An Area Authority shall ensure that another person taking over his responsibilities is
aware of the status of Permits in his area.
Information on the roles that a licensed Area Authority can fulfil is contained in 5.8.
5.5
The Permit Holder
Before work starts on a Permit, the Permit Holder must:

Understand the work content and the requirements of the Job HSE Plan.

Tell the work party about the work content and the requirements of the Job HSE
Plan, ensuring that all members of the work party understand what is required.

Ensure that the Permit is validated by the appropriate Area Authority before
starting work each day.
During the work, the Permit Holder must:
Page 30

Ensure that the Permit is displayed at the worksite whenever work is underway

Ensure that the Job HSE Plan and TRIC controls are complied with throughout
the work.

Stay at or in close visual contact with the Worksite at all times, to supervise the
work party.

Ensure that the worksite and equipment are safe whenever work is suspended,
signing the Permit to confirm this.
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Tell anyone who takes over as Permit Holder about the status of the work and
the requirements of the Permit and Job HSE Plan.

Stop work and move all personnel to a safe location if conditions on site
become hazardous or the precautions on the Job HSE Plan become
inadequate.
A Permit Holder may only be in charge of:

Or
One Validated Class A Permit at any one time.

Up to 4 Validated Class B Permits, if they are at the same location, and within
sight of each other, such that the Permit Holder may supervise all the tasks
effectively.
When no further work is to take place under a Permit, the Permit Holder must:

Ensure that the site and equipment have been left safe.

Sign the Permit to indicate whether work is complete or not.

Return the Permit back to the Area Authority
Information on the roles that a licensed Permit Holder can fulfil are contained in 5.8.
5.6
Other Affected Custodian
When a Permit will affect, or be affected by, another Supervisor’s area, this Supervisor
will sign as Other Affected Custodian, and is responsible for:

Agreeing that the work affecting, or affected by, his area can be done.

Identifying any additional hazards due to his assets.

Deciding on any additional precautions required due to potential hazards
relating to his assets.
Any additional controls are to be added to the Job HSE Plan
5.7
Gas Tester
An Authorised Gas Tester (AGT) is a person who has passed the Gas Testing Course
and holds a current Gas Testers Card, and has passed either a Permit to Work
Signatories or Holders Course.
For Class A Permits, the appropriate Area Authority should do the first Gas Test each
day, however this can be delegated to an AGT for certain jobs at the discretion of the
Responsible Supervisor. The Area Authority must be an Authorised Gas Tester. Any
Authorised Gas Tester may carry out further gas tests required during the day.
Any Authorised Gas Tester may do gas tests for work covered by a Class B Permit.
In both cases, the Authorised Gas Tester must:
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
Gas test at the frequency stated on the Permit or Confined Space Entry
Certificate.

Fill in the result of the gas test on the Gas Test Record and Sign it.
When a test result indicates that it is NOT safe to work, the Authorised Gas
Tester must:

Tell the Permit Holder to stop any current work.

Tell the Permit Holder and Area Authority that it is not safe to work, and why, so
that the problem can be dealt with.
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5.8
PTW Multi-Roles (Licensed Personnel)
People licensed in PTW roles may also act in other roles, as shown in Table 5.2
However, there are restrictions on the number of roles that any one person may carry
out on one Permit. These are shown in Table 5.3.
Table 5.2 - Roles that May be Carried out by Licensed Personnel
May act as

Responsible
Supervisor
Area Authority
Permit
Applicant
Permit Holder
Licensed as 
Responsible
Supervisor
Yes
Yes
Yes
Yes
Area Authority
No
Yes
Yes
Yes
Permit Applicant
No
No
Yes
Yes
Permit Holder
No
No
No
Yes
For normal activities, it is expected that the Responsible Supervisor, Permit Applicant,
Area Authority and Permit Holder will be four different people. In emergency or
breakdown situations, or for specialist work, this can sometimes be difficult to arrange.
On these occasions a person licensed for one role can carry out another role as well,
although there are restrictions to ensure that an independent review of the safety of the
work is carried out.
Table 5.3 - Roles that can be Filled by Any One Person on a Single Permit
May act as

Responsible
Supervisor
Area Authority
Permit
Applicant
Permit Holder
Licensed as 
Responsible
Supervisor
Yes
Yes
(See Note 1)
No
No
Area Authority
No
Yes
Yes
(See Note 2)
No
Permit Applicant
No
No
Yes
Yes
Permit Holder
No
No
No
Yes
NOTES:
1.
In an emergency or during night time breakdown situations, a licensed
Responsible Supervisor may sign as Responsible Supervisor and Area
Authority.
Some Area Authorities have been licensed as Responsible
Supervisors to allow work to proceed without calling up the daytime
Responsible Supervisor. This will allow two-man Permit operation if the Permit
Holder has also been licensed as a Permit Applicant. This option is acceptable
only in the night time breakdown situation when there are no other active
Permits in operation. It is not intended that the normal daytime roles of the
Responsible Supervisor should be delegated to the Operators at the remote
stations.
2.
If the Area Authority has not been licensed as Responsible Supervisor, or if the
Permit Holder has not been licensed as a Permit Applicant, it will be necessary
to call up the daytime Responsible Supervisor. In this case the Area Authority
will be the Permit Applicant.
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6
How the Permit to Work System Operates
6.1
The Permit Forms
6.1.1
Class A Permit to Work
Revision 6.1
Effective: Dec-08
An example of the Class A Permit is shown in Appendix 1.
Class A Permits have a RED edge colour.
The Permit comprise of an:
Original
Worksite Copy (PINK)
1st Copy-
Permit Issue Point Copy (GREEN)
Information Copy-
Responsible Supervisor’s Copy (WHITE)
A Class A Permit shall be used for work as detailed in 3.6. and can be authorised for a
maximum of 14 days, with Validation required each working day.
6.1.2
Class B Permit to Work
The layout of the Class B Permit is shown in Appendix 2.
Class B Permits have a DARK BLUE edge colour.
The Permit comprise of an:
Original
Worksite Copy (BLUE)
1st Copy-
Permit Issue Point Copy (GREEN)
Information Copy-
Responsible Supervisor’s Copy (WHITE)
A Class B Permit shall be used for work as detailed in 3.6. and can be authorised for a
maximum of 14 days, with Validation required each working day.
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6.1.3
Class A and Class B Permit Forms
The Permit forms are divided into Boxes which cover the following parts of the life cycle
of the Permit:
Box No
Function of Box
Completed By:
1
2
3
4
5
6
7
8
9
10a
10b
10c
11a/b
APPLICATION and Work Description
Certificates attached to the Permit
Gas Testing Requirements
Worksite Examinations
AGREEMENT of Other Affected Custodian
AUTHORISATION of the Permit
Mechanical Isolation Record
Vehicle Access to Process Facility
Gas Test Record
VALIDATION of the Permit
ACCEPTANCE of the Permit
SUSPENSION of the Permit
CANCELLATION - work complete
Permit Applicant
Permit Applicant
Permit Applicant
Permit Applicant
Other Affected Custodian
Responsible Supervisor
Area Authority
Permit Applicant/Area Authority
Authorised Gas Tester
Area Authority
Permit Holder
Permit Holder
Permit Holder / Area Authority
Responsible
Supervisor
Applicant
Apply for
Permit
(sect. 6.2)
Applicant
Authorise
Permit
(sect. 6.3)
Area
Authority
Area
Authority
Brief Permit
Holder
(sect. 6.4)
Prepare
Worksite
(sect. 6.5)
Area
Authority
Permit
Holder
Validate
Permit
(sect. 6.7)
Permit
Holder
Permit
Holder
Revalidate
Permit
(sect.6.15)
Accept Permit
(sect. 6.8)
Carryout
Work
(sect. 6.9 6.12)
Accept
Permit
(sect. 6.8)
YES
NO
Responsible
Supervisor
Permit
Still
Authorised
Permit Holder/
Area Authority
Archive
Permit
(sect. 6.17)
Cancel
Permit
(sect. 6.16)
NO
YES
Permit
Holder
Suspend
Permit
(sect. 6.13)
Work
Finished?
Figure 6.1 – Permit Life Cycle
6.2
Applying for a Permit - Boxes 1 to 5
6.2.1
Obtaining and Filling in Permit Forms
The list in 3.6 shows by colour coding which type of Permit is to be used, depending on
the work to be done, and the area where it will be done.
Departments/Contractors who apply for Permits should keep their own pads of Permit
forms. These may be obtained from PDO Administration Offices.
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The Permit is divided into sections, called “boxes” in this manual. Do not write
information outside these boxes
Where any box on a Permit form is not used, it should be marked N/A. or have a line
drawn through it. Boxes must not be left blank.
There are a number of tick boxes (e.g. Haz Zone 0 ) on the Permit to indicate area
classification, gas test options etc. These are to be ticked with clear ticks  when
required.
Permits must be completed in Black ball-point pen, to ensure that all copies of the
Permit can be read easily. Felt pen or pencil must not be used.
NO changes to the wording on a Permit are allowed. If changes are required, a new
Permit must be raised. The only exception is correcting small mistakes, where the
mistake is crossed out and the change initialled by the Permit Applicant and
Responsible Supervisor.
Additions to the work scope are NOT ALLOWED under any circumstances. If an
addition to the work scope is required, a new Permit shall be raised. It is at the
Responsible Supervisor’s discretion whether an additional period of 24 or 72 hrs is
required before he Authorises the new Permit and whether the additional workscope
requires an additional site visit.
6.2.2
Application and Work Description – Box 1
Permit Applicant
The Permit Applicant, normally the supervisor of the personnel doing the work, must
have passed the Permit Signatories course, and must be licensed as a Permit
Applicant, Area Authority, or Responsible Supervisor for the area in which the work is
being carried out.
The Permit Applicant must first choose which Permit he needs from the table in 3.6.
The Permit Applicant will then fill in the Header and Boxes 1-4 and 8 of the Permit by
entering the following information into the appropriate boxes.
Header
In the Header area at the top left of the Permit:

Write the Work Order title or a short description of the work in the Work Order
title box.

Tick the appropriate Hotwork box (Yes or No)
Application and Work Description (Box 1)
In Box 1 of the Permit, enter:
Page 35

Permit Applicant’s Name, Post, and Telephone No.

For Contractors, the name of the Company.

The location of the Work (e.g. Station Name), and the Worksite (the exact place
in the Station where the work is to be done). For repetitive routine tasks
(subject of a planned routine) across different stations, where the intrinsic
hazard is the same, (ie. NDT work, Beam Pump maintenance) and the site
conditions are similar (eg. No change in H2S classification,) the Responsible
Supervisor may allow a number of stations or worksites to be identified on a
single permit.

The maximum number in the workparty should be agreed at the time of permit
authorisation by the Responsible Supervisor, Area Authority, and Permit
Applicant, and consideration should be given to worksite location and visibility
of work party.. A documented Risk Assessment should be presented with the
JSP when the workparty strength exceeds 20.
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
The Hazardous Area Classification of the worksite (shown on Hazardous Area
drawings for the Station).

Whether the work involves working with Naturally Occurring Radioactive
Materials (NORM) or in a NORM Restricted Area (refer to SP-1170 Naturally
Occurring Radioactive Materials).

Whether the work is in an H2S Facility (shown on the H2S Facility listing in the
Area Safety Case). And if known the PPM figure of the maximum expected
level.

The planned time for the work including preparation.

Whether vehicle access to a Process Facility will be required (details of the
vehicle are to be written in Box 8).

The number of the Work Order, or Engineering Work pack for the work. This is
very important, as it is used to link the permit to the daily schedule in the work
tracking system.

The numbers of any Permits for other parts of the work (in the Associated
Permit Number boxes). This will include any previous Permit for the work.

If the work is in the “frozen plan” or not.

A precise description of the work to be done, including the equipment to be
worked on and tools to be used.

The activity or activities from table in 3.6.

Any special equipment to be used, especially if it may introduce a hazard.
The Work Description must include enough information to allow Responsible
Supervisors to identify the hazards involved in the work and the Precautions necessary
to control them.
A single Permit must not to be used for a sequence of separate equipment where each
equipment will be shut down, worked on and put back into service whilst the other
equipment remain in service. This is to avoid confusion over isolations. The only
exception allowed is work on electrical or electronic systems, such as lighting, which
can be isolated and worked on in sequence.
There may be a particular activity that presents the same intrinsic hazards regardless of
location e.g. NDT where the activity procedure is exactly the same each time.
When a Permit is written for fault finding, it is important that the work description does
not allow the work party to proceed with repair activities without the risks involved being
assessed. The work description should include:

A description of the fault to be investigated.

A description of the types of fault finding work that may be done.

The point at which work should stop, so that a further Permit for the repair can
be raised.
Job HSE Plan
The Permit Applicant shall produce a Job HSE Plan (See Section 11.2) which will:
Page 36

Identify the hazards due to work and its location,

Define the safety precautions required.

Include a worksite examination to identify and assess the hazards (except for
Class B Permits at remote locations where it is known that no other facilities,
such as overhead or underground services could create a hazard to the work
party)
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6.2.3
Certificates Attached to This Permit – Box 2
The Permit Applicant should attach the following certificates to the Permits if they are
required:

Mechanical Isolation1 (Appendix 3)

Confined Space Entry (Appendix 4)

Additional Gas Test Record (Appendix 4)

Electrical Isolation

Electrical Immobilisation

Excavation (Appendix 6)

Electrical Safety Document

Radiography (Appendix 7)

Overhead Line Clearance (Appendix 8)
The Permit Applicant shall tick "  " the appropriate column of Box 2 to show which
Certificates are attached, and then write the number of each certificate in the ‘Certificate
Number(s)’ part of Box 2.
If more than one Permit is to be worked on within the same isolation boundary, the
isolation for each permit shall be recorded separately on its own Permit or Isolation
Certificate. This will minimise the risk of an isolation being removed before all work is
complete.
6.2.4
Gas Testing Requirements – Box 3
A Gas Test is required whenever:

Hot Work is to be done in an area where hydrocarbons or other flammable
gases/vapours may be present.

Vehicle Access is required to a Process Facility.

Diesel engine driven equipment is used

Entry is to be made into a Vessel or other Confined Space.

Work is at a place where toxic gases/vapours may be present.
When a Gas Test is required, the Permit Applicant shall:

Tick the gases to be tested for.

Indicate how often the test shall be repeated.

State if continuous monitoring for gas is required during the work.
Further guidance on gas testing can be found in
Procedure.
3.6 and PR-1154 Gas Testing
1
For Mechanical Isolations, Box 7 of the Permit may be used instead of a Certificate. However
a limited number of isolation points can be accommodated. When utilising this facility the Permit
Applicant should write "see Box 7" in place of the ‘Certificate Number(s)’. If more isolation points
are required than are available, or if the isolation shall be left in place after the Permit has been
cancelled, requires an Isolation Certificate to be raised.
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6.2.5
Revision 6.1
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Worksite Examinations - Box 4
The Permit Applicant shall tick Box 4, indicating when the Validator must do a Worksite
Examination (i.e. First day or every day.) The minimum requirements for Worksite
Examinations are listed in 4.1.
6.2.6
Agreement of Other Affected Custodian - Box 5
Where the Responsible Supervisor considers that the work will affect, or be affected by,
another Custodian’s area, the Responsible Supervisor shall define the most appropriate
way of obtaining the agreement of the ‘Other Affected Custodian’ (Permit Hand carried
by Permit Applicant, fax, email, etc.).
The Other Affected Custodian shall check if there are any additional precautions
needed for the work, as a result of work or hazards in his area. If necessary, he shall
add to those specified on the Job HSE Plan. When he is satisfied that the Permit and
Job HSE Plan will control the work safely, the Other Affected Custodian will sign Box 5,
with name, time and date if the actual Permit is available to him. If not, written
agreement by fax / email may be given. This shall then be attached to the Permit.
The most frequent example which requires a signature from an Other Affected
Custodian is for work within 100m of a drilling rig, where the PDO Drilling Supervisor is
the 'Other Affected Custodian'.
NOTE: No specific Training or Licensing in the PTW System is required for the Other
Affected Custodian.
6.3
Authorisation and Coordination
6.3.1
Authorisation – Box 6
When Boxes 1-5 of the Permit have been completed, the Permit Applicant shall take the
Permit and Certificates to the appropriate Responsible Supervisor for Authorisation.
Responsible Supervisors require notice of a Permit, to allow time to discuss the work,
and, for higher risk work, for examination of the worksite. The notice periods required
are:

Class A Permits - 72 hours

Class B Permits - 24 hours.
NOTE: The Responsible Supervisor may allow shorter notice periods for essential
unplanned work.
When Permits are received from Permit Applicants, the Permit Applicant shall ensure
that details of the planned Permits are entered into the Work Tracking System for the
date they are required and the Responsible Supervisor before authorising the Permit
should check that:
Page 38

All necessary information has been written in Boxes 1-5, and that the
information can be clearly understood.

The Task Description is correct for the work to be done.

The Job HSE Plan is attached and identifies all hazards that may affect the
work, and the controls required to ensure that the work can be done safely.

The Isolations required have been identified (in conjunction with the competent
personnel i.e. Senior Foreman or Authorised Electrical Person and where
necessary the Permit Applicant), and have been written on the Isolation
Certificate or in Box 7 (mechanical) of the Permit. All Isolation Certificates have
been identified, and they have been attached to the Permit, with their numbers
written on the Permit.
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
The necessary Electrical Safety Documents have been raised, and signed by a
Senior Authorised Electrical Person if Electrical Work is involved. Their
numbers should also be written in Box 2 of the Permit.

Any gas testing requirements have been listed in Box 3 and are correct for the
types of gas releases that might occur during the work.

The permit qualifies for pre-validation as per 6.7.1. If it does qualify, this should
be noted as a comment in Box 6 - Authorisation
If additional Preparations or Precautions are required, the Responsible Supervisor shall
add them to the Job HSE Plan and ensure they are agreed with the Permit Applicant.
If too many changes are needed to a Permit or other documents required for the work,
the Responsible Supervisor may reject the Permit, and ask for a new one to be written.
The Permit Applicant should be informed of what was wrong with the first Permit.
For Class A Permits, the Responsible Supervisor must examine the worksite, with the
Permit Applicant, to ensure the work is fully described on the Permit and that all safety
aspects have been considered. However, there are certain scenarios where this can be
relaxed under the direction of the Production Co-ordinator, and only following a
discussion by all parties, and a Risk Assessment completed.
For Class B Permits the Responsible Supervisor need not examine the worksite unless
he considers this necessary.
Once he is satisfied that the Permit is correct for the work, the Responsible Supervisor
shall set an Authorisation period for the Permit. The maximum Authorisation period is
14 days. The period set should take account of the planned work schedule stated in
Box 1, to avoid Permits being authorised for periods much longer than required, but
also to prevent a further Permit being required if the job should over-run slightly.
The Responsible Supervisor shall then to write his name and post, and sign and date
Box 6.
Once a Permit has been authorised by the Responsible Supervisor, the only changes
that can be made to it are the addition of new controls to the Job HSE Plan. These
changes are only to be made by the Responsible Supervisor or the Area Authority.
Deletion of controls is not allowed. If any changes to controls are made, the Permit
Applicant shall be informed.
When the Permit has been authorised, the Responsible Supervisor shall ensure that the
Work Tracking system is updated to show the status as Authorised.
The Permit Applicant is then responsible for ensuring that the Permit Holder is fully
briefed on the work content, precautions required and the requirements of the Job HSE
Plan.
NO ONE MAY AUTHORISE A PERMIT FOR WORK THAT THEY
WILL DO THEMSELVES
6.3.2
Safety Coordination by Responsible Supervisor
The total workload at each location will have been reviewed at the daily planning
meeting for the Area. This should identify and eliminate any possible conflicts. However,
it is most important that the Responsible Supervisor looks in detail at the Permit
requests for the following day, and eliminates any safety conflicts.
At 1600 hrs each day (or earlier during Ramadan) the Responsible Supervisor shall
review the work for each location for the following day, using:
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
The daily schedule (from Work Tracking system Authorised Permits due to start
next day)

Permits for any additional work that is urgently required.
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Lists from Permit Holders / Permit Applicants showing which Permits have not
been completed and will be required the following day.
The Responsible Supervisor shall identify any potential conflicts between activities, and
decide which Permits may be validated for work the following day. The Responsible
Supervisor is then to update the status of these Permits to Validated within the Work
Tracking system.
The Responsible Supervisor shall re-check the list of Validated Permits for each
location before start of work on the following day, and then give or fax the Tracking
System Report for each location to the Area Authority. Class A Permits in a Process
Facility should only be allowed to be validated if the Area Authority will remain at the
Facility when work is underway.
There will be a further check for conflict by the Area Authority, at the Permit Issue Point
when Permits are validated. (See 6.7)
6.4
Briefing of the Permit Holder
When the Permit is authorised, it is returned to the Permit Applicant. The Permit
Applicant must then brief the Permit Holder on the work and hazards, and how these
will be controlled, using the Job HSE Plan. The Permit Applicant is then to give the
Permit, Certificates and Job HSE Plan to the Permit Holder, who will take them to the
Area Authority for Validation, after any necessary Isolation.
It is essential that the Permit Holder brief the Area Authority on the scope of the work
that is to take place. The Area Authority shall be absolutely certain of the scope of the
work before allowing any work to commence.
6.5
Isolations
6.5.1
Mechanical Isolation and De-Isolation Approval and Recording - Box 7
Where a mechanical isolation is required for a task and involves not more than 10
Isolation Points, the Isolation may be recorded and authorised in Box 7. Box 7 of the
Permit is not to be used for isolations for vessel entry. More complex isolations require
an Isolation Certificate. Details of the Isolation process are included in Section 7.
When Box 7 is being used, details of the isolation are to be written on the Permit by the
Responsible Supervisor or Area Authority. The Responsible Supervisor is then to
authorise the Isolation by signing Box 7. When the equipment has been isolated, the
person who did the Isolation inserts the Tag Label Nos. and also signs Box 7.
6.5.2
Electrical Isolations
Electrical Isolations/Immobilisations must be authorised, recorded and done in
accordance with PDO Electrical Safety Rules. Box 7 is not to be used for Electrical
Isolations.
6.6
Vehicle Access - Box 8
Vehicles are not permitted to enter or to drive within 50m of a Process Facility.
If a vehicle is required to enter a one of these areas as part of a work activity, a Permit
is required. Exceptions are that a Permit is not required for:
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
Vehicle access to a pig trap area for pipeline pigging operations covered by
authorised procedures and listed in the approved programme.

Travel to and from the facility in crew vehicles via the normal marked route to
the facility parking area.

Use of delivery trucks, as covered in 15.6.6.
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If vehicle access to a Restricted Area is required, the Permit Applicant shall write in Box
8 of the Permit for the work.

The vehicle type.

The location to which access is required, together with an associated route plan
which shall be attached to the permit. The route plan shall be a plot plan of the
station with the vehicle route marked clearly on it.

The reason for vehicle access.
NOTE: Vehicle access should be granted for delivering essential materials or
equipment only. It should not be used for general access or transport of personnel, and
the vehicle should be removed immediately the delivery is completed. In the case of
crane use, this requires continuous gas monitoring.
A satisfactory Gas Test is required before each vehicle access or movement. Details
and results of the Gas Test are to be entered in Box 9. The Station gates must be
closed after each entry or exit.
In addition, the Permit Holder should verify the vehicle is free of mobile phones
or other sources of ignition e.g. Matches or lighters.
NOTE: This approval is not to be used to authorise the passage of high vehicles
beneath overhead power lines, for which a separate Overhead Line Clearance
Certificate is required.
6.7
Co-ordination and Validation at the Issue Point - Boxes 9 & 10a
Permits must be validated by the Area Authority responsible for the worksite, before
work can start.
Before Validating a Permit, the Area Authority must carry out a co-ordination check for
safety conflicts between activities. To do this he must:

Check the Work Tracking list to ensure the Permit is Valid for that day. If it is
not on the list, the Responsible Supervisor will give guidance on whether that
Permit may be validated.

Check that there are no other conflicting activities, which may be operational,
covered by other Permits, or covered by Well Handover Certificates, Pigging
Authorisation Forms etc.

Mark the location of the work on the Permit Location Board (See Section 8.3)
When the Area Authority is sure that the work will not cause a conflict, he shall satisfy
himself that the worksite is safe for the work. To do this, he must:

Do any Area Authority preparations required by the Job HSE Plan to make the
worksite safe for work to start.

Where required by 4.1, examine the worksite with the Permit Holder to ensure
that the Permit Holder preparations as required by the Job HSE Plan have been
completed to make the worksite safe for work to start.

If Isolation is required and has not already been completed, do the Isolation,
and complete the Isolation Certificate/Box 7 of the Permit as appropriate.

If a Gas Test for Class A work is required, do this immediately prior to
Validation of the Permit, with results recorded in Box 9.

Ensure that the Permit Holder understands the work and the precautions which
are required.
When satisfied that it is safe for work to start, the Area Authority shall validate the
Permit and initial the Area Authority Preparations part of the Job HSE Plan.
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THE VALIDATION PERIOD SHALL BE A MAXIMUM OF 12 HOURS,
OR THE END OF THE SHIFT WORKED BY THE AREA AUTHORITY,
WHICHEVER IS SOONER.
Class A Permits should only be validated if the Area Authority will remain in the area of
the work when work is underway.
6.7.1
Pre-Validation
Pre-validation is where the Area Authority agrees during daily suspension to prevalidate a permit from 07.00 the following day. The conditions for this process are
detailed below.
PRE-VALIDATION CAN NOT BE USED FOR THE FIRST VALIDATION.
6.8

The type of task falling into this category is agreed at the time of permit
submission between the Permit Applicant and Responsible Supervisor and only
applies to work outside of a process area.

The work must be an ongoing repetitive job e.g. Flowline installation in a
hydrocarbon area, where the job task or method will not change the following
day. The task progress and any pre-validation conditions must be discussed
with the Area Authority at the time of daily permit suspension,

The permit is moved to the “validated” section of the permit rack with a note
attached and visible as PRE-VALIDATED for 07.00.

The work cannot start until after 07.00 the following day.

Any pre-validation gas tests are carried out by an AGT (who may or may not be
the Area Authority) at the discretion of the Area Authority.

The Permit Holder is still responsible for carrying out a robust Tool Box Talk.
Acceptance by the Permit Holder - Box 10b
When satisfied that the worksite is safe, the Permit Holder shall sign Box 10b of the
Permit in the presence of the Area Authority.
THE PERMIT HOLDER CANNOT ALSO BE THE AREA AUTHORITY.
The Permit Holder has the right to refuse to sign the Permit Acceptance until he is
satisfied that the worksite is safe.
By signing the Permit the Permit Holder is agreeing to the following:

That he fully understands the work and precautions.

That all members of the work party are fully briefed.

That the Job HSE Plan will be complied with.

That the Permit will always be displayed at the worksite in a plastic wallet when
work is in progress.

That no work will be done unless the Area Authority has validated the Permit.

That the worksite will be left in a safe condition on completion or suspension of
work.
A Permit Holder may only be in charge of:
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
One Validated Class A Permit at any one time.

Up to a total of 4 Class B Permits, if they are at the same location, and within
sight of each other, such that the Permit Holder may supervise all the tasks
effectively.
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A Permit Holder in charge of a Validated Class A Permit may not be in charge of
Class B Permits at the same time.
The Permit Holder’s signature must appear on both the Worksite and Permit Rack
copies of the Permit. This means that:

When work is in a station, the Area Authority should put the Worksite and
Permit Rack copies of the Permit together for the Permit Holder to sign.

Where the worksite is remote from the Permit Issue Point, and a Worksite
examination before work starts is required by 4.1, the Area Authority shall take
the Worksite and Permit Rack copies of the Permit to the worksite where the
Permit Holder can sign them.

Where the worksite is remote from the Permit Issue Point, and a Worksite
examination is not required by 4.1, the Permit Holder shall sign the GREEN
copy of the Permit before leaving the Permit Issue Point, to indicate that he
intends to start work. He shall sign the worksite copy of the Permit at the
worksite, when he is satisfied that it is safe for work to start.
No Work May Take Place Under The Permit Until:

The Permit has been validated.

The Permit Holder has signed to accept it.

The Permit is displayed at the Worksite.
The Area Authority's verbal approval shall be obtained before one Permit Holder hands
over responsibility for a Valid Permit to another Permit Holder. The new Permit Holder
shall accept the Permit by signing the next line in Box 10b of the Worksite and Permit
Rack copies of the Permit. When remote sites are involved, the new Permit Holder shall
contact the Area Authority for approval and sign the worksite copy, the Area Authority is
then to write the name of the new Permit Holder in Box 10b of the Permit Rack copy.
During the handover briefing, the outgoing Permit Holder should brief the new Permit
Holder on the topics suggested for briefing of the work party in 6.10.
6.9
Actions after Validation
When the Permit has been signed by both the Area Authority and Permit Holder, the top
(worksite) copy (PINK or BLUE) should be given to the Permit Holder, together with the
Worksite copy of any associated Certificates. The Permit Holder is responsible for
ensuring that the Permit and Job HSE Plan are placed in an approved wallet, displayed
in a safe position at the Worksite where it can be seen clearly, and is kept there whilst
work is being done.
NO WORK IS TO BE DONE UNLESS A VALIDATED PERMIT IS
CLEARLY DISPLAYED AT THE WORKSITE IN A PLASTIC WALLET.
Work may now start, following briefing of the workforce (see 6.11 below.)
The Area Authority is to place the GREEN copy of the Permit, together with Permit
Rack copies of any associated Certificates in the VALIDATED section of the Permit
Rack.
6.10
Briefing the Work Party – the Toolbox Talk
Toolbox talks are short briefings given by either the Permit Applicant or Permit Holder to
all who are involved in the work controlled by a permit. These briefings are given before
the work commences. The Permit Holder is to ensure that the Work Party is fully aware
of the Work Content and Precautions to be taken.
Toolbox Talks are given for:

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Routine jobs when personnel are unfamiliar with the location or the tasks to be
undertaken.

In cases where personnel may have difficulty reading or understanding the
Permit, or Certificate, or safety conditions associated with a job.
Toolbox talks:

Discuss the hazards of the job.

Explain the plan for the activity

Identify individual responsibilities

Review the procedures to be used during the work.
Topics that are covered by Toolbox Talks include:

The work to be undertaken at the work location.

The work plan and worksafe methods to be used to do the work safely.

What individuals in the work party will actually be doing during the completion of
the work.

Particular skills of individuals involved.

Access and Evacuation procedure refreshers.

The work environment and any particular hazards that have controls.

The work description of the Permit.

The Job HSE Plan precautions, protection and Worksite preparations.

The equipment involved.

The materials to be used.

Any isolations which need to take place.

Any potential conflicting activities.

Questions and discussion from all work party personnel.
NOTE: A reference card (TRIC) for use by Permit Holders when giving Toolbox Talks is
available, and shall be used.
6.11
Supervision of the Work
Throughout the work, the Permit Holder is responsible for ensuring that the Work Party
complies with the requirements of the Permit and Permit system. The Permit Holder
must remain at, or in close visual contact with, the worksite at all times.
NOTE: The Job HSE Plan and the TRIC are the most useful tools to ensure work is
carried out safely at the work location. It needs to be applied diligently at every stage of
the job.
6.12
Gas Test Record - Box 9
Gas Testing and Monitoring shall be carried out as required by Box 3 of the Permit.
For Class A Permits, the appropriate Area Authority is to do the first Gas Test each day.
The Area Authority must be an Authorised Gas Tester. Any Authorised Gas Tester may
carry out further gas tests required during the day.
Any Authorised Gas Tester may do gas tests for work covered by a Class B Permit.
The results of the Gas Test are to be recorded in Box 9, except for Confined Space
results, which are to be recorded on the Confined Space Entry Certificate. When Box 9
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is full, the Additional Gas Test Record form (See 10.2.2) shall be used to record further
results.
Gas Tests are to be done before work starts, and at the frequency stated on the Permit.
An extra test is required before work re-starts, if the worksite is left unattended for more
than one hour.
In addition to Gas Testing, continuous monitoring may be required. This will have been
specified in Box 3 of the Permit. A Permit Holder may supervise work for which
continuous gas monitoring is required without being licensed as a Gas Tester. He must,
however, have been trained in the use of the gas monitor.
If gas or other hazardous atmosphere is found at any stage, work must stop. The
Permit is to be suspended as described in 6.13. The Responsible Supervisor must be
informed as soon as possible.
6.13
Suspension of Work - Box 10c
6.13.1 Reason for Suspension
A Permit must be suspended if any one of the following occurs:
a.
An unsafe situation develops which requires the work to be stopped, for
example:
o
o
o
b.
A Reportable Incident occurs during the work.
A Gas or Oil leak occurs near the work.
Anyone suspects that an unsafe situation exists. In this case he has the
Authority and Responsibility to stop the work.
The work is delayed or interrupted for more than 4 hours, for any reason.
c.
The work needs to be stopped to allow conflicting work of a higher priority to
proceed. In this case the Permit Holder is to be instructed to stop work by the
Responsible Supervisor/Area Authority and is to be informed of the reasons. It
is the responsibility of the Area Authority to ensure that it is safe to stop work
and leave the Worksite in its current condition.
d.
The equipment is to be de-isolated so that it can be tested after being worked
on.
6.13.2 Permit Suspension
When a Permit is to be suspended, the Permit Holder shall take the following actions:
Page 45

Check that the Worksite and equipment affected by the work have been left in a
safe condition.

Sign Box 10c of the PINK/BLUE copy of the Permit to confirm that work has
been suspended.

Take the Permit to the Issue Point, sign the Green copy and give it to the Area
Authority who will keep it there until ready to re-start work. If the work is in a
Process Facility, this must be done. For work at remote locations, the
procedure below may be used.

For some work at remote locations, it is not practicable for the Permit Holder to
return the Permit to the Issue Point when work is stopped. For this type of work
the Worksite Supervisor should agree with the Area Authority that the Permit
will be taken to an agreed collection point (e.g. a box at the Permit Issue Point
or PDO Camp offices.) The Area Authority will then take the PINK/BLUE copies
of suspended Permits back to the Issue Point the next time that the station is
open.
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NOTE: The steps above may be used for pre-validations with agreement from the
Area Authority. This may require the worksite and the permit board copies of the
permit being signed separately.
Permits do not require to be suspended for meal breaks. However if a work party are
called to another more urgent job before they have finished the first one, during a meal
break away from the station, the Holder is to inform the Area Authority, who will inspect
the worksite and suspend the permit by signing Box 10c himself.
If work is not complete, but cannot re-start until after the Permit Authorisation period has
expired, the Permit is to be cancelled by signing it off in Box 11 - “Work Not
Completed”.
Isolations may be retained under the Extended Period Isolation
procedure described in Section 7.
It is not necessary to suspend a Permit before it is cancelled.
Once a Permit has been suspended no work covered by that Permit may be done until
the Permit has been Re-Validated as described in 6.15 below.
Worksite and Permit Issue Point copies of all suspended Permits are to be kept in the
Suspended section of the Permit Rack.
If a Permit covers more than one station (see 6.2.2), when suspended to move to
another station, the worksite and permit board copies should be gathered together and
taken to the next station.
6.13.3 Stoppage and Re-Starting of Work following an Alarm in a Station
Stopping Work
All work is to stop immediately following an Evacuation Alarm in any facility. Each
Permit Holder is to ensure that his worksites have been left in a safe condition, and is
then to evacuate the site as quickly as possible.
If the unplanned stoppage of work may cause a dangerous condition, the work party is
to take the emergency actions stated on the Job HSE Plan.
When the alarm condition has cleared, the Worksite Copy of the Permit is to be taken to
the Permit Issue Point or Area Authority.
Re-Starting Work
If the Alarm was not caused by an actual alarm condition, the Area Authority may
verbally re-authorise each Permit Holder to re-start work once the all clear signal is
given.
Where the Alarm was caused by an actual alarm condition, the Responsible Supervisor
or Area Authority may require Permits to be suspended and Re-Validated following the
normal Re-validation procedure. A further Worksite examination is required if the
problem which caused the alarm could have changed conditions at the worksite.
6.14
Changeover of Personnel
6.14.1 Changeover of Area Authority during Validation Period of Permit
When a new Area Authority takes over, he must re-validate all Permits in his area. For
those within his station and the immediate area, he will visit the sites and sign both
copies in Box 10a. For Permits at remote locations he will sign the green copy at the
Issue Point when he takes over and the worksite copy is returned at the end of the day.
6.14.2 Changeover of Permit Holder
Within a Process Facility, the new Permit Holder must obtain the Area Authority’s
approval to change and sign Box 10b of both copies of the permit. At remote locations,
where he is unable to visit the Area Authority, he must speak to the Area Authority, and
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sign the worksite copy when he takes over. The AA will change the name of the Permit
Holder in box 10b. The green copy is signed when he returns to the station. The
outgoing Holder is not to leave the worksite until he has fully briefed the new Holder and
the new Holder has signed to accept the Permit in his presence.
6.15
Permit Re-validation - Boxes 10a & 10b
The Re-validation process is exactly the same as the Validation and acceptance
process described in 6.8 and 6.9, although the requirement for worksite inspections will
differ, as shown in 4.1.
If the Area Authority changes during the work period the new Area Authority is to ReValidate all Permits in his area. This is done by signing ALL the green copies at the
Permit Issue Point.
For Class ‘A’ Permits he must examine the worksites and sign the Worksite Copy of
each Permit.
For Class ‘B’ Permits the Worksite Copy is to be signed by the new Area Authority on
the return of the Worksite Copy to the Permit Issue Point.
After Re-validation of the Permit, the Permit Holder is to satisfy himself that the
Worksite is safe, and sign Box 10b to accept the Permit.
Once all spaces for Re-validation have been used, a new Permit is required.
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6.16
Permit Cancellation - Boxes 11 a) and 11 b)
6.16.1 Requirements for Cancellation
A Permit shall be cancelled when any of the following occur:

The Work is complete.

The Work has not been completed, but a new Permit is required.

The Permit has reached the end of its Authorisation Period.

The Work is to be suspended until a date after the Permit Authorisation Period,
e.g. when spares will be required to repair an item of equipment.

The Work to be done is found to be different from the Work Description on the
Permit. A new Permit must then be obtained for the work.
6.16.2 Permit Return by Permit Holder
Box 11a is to be used when the Work has been completed. It shall also be used when
the Work has Not Been Completed, but a new Permit is required.
Example: The work will continue past the authorisation dates on the Permit, or the work
to be done is found to be different from the Work Description on the Permit.
Box 11a of the PINK/BLUE and GREEN copies of the Permit is to be signed by the
Permit Holder if the work:
-
is complete and the work has been properly done.
OR
-
the work has stopped, but is not complete.
A signature in the box confirms that the worksite has been left in a clean and safe
condition, with all tools and equipment removed.
When Box 11a has been signed, no further work may take place under that Permit.
For work at remote locations, it is sometimes not practicable to return the Permit to the
Issue Point when work is complete. In this situation, the Worksite Supervisor should
agree with the Area Authority that the Permit be taken to an agreed collection point (e.g.
a box at the PDO Camp offices.) The Area Authority will then take the PINK/BLUE
copies of completed Permits back to the Issue Point to match them with the Issue Point
copies, and sign them off.
6.16.3 Permit Cancellation by Area Authority
Box 11b is to be used where the Permit has reached the end of its Authorisation
Period. It shall also be used when the work is to be suspended until a date after the
Permit Authorisation Period.
Where the work is in a Process Facility, the Area Authority should do a worksite
inspection and sign in Box 11b, to ensure that it has been left in a clean and safe
condition. When satisfied that the worksite has been left in a safe condition the Area
Authority shall complete and sign Box 11b of the PINK/BLUE and GREEN copies of the
Permit.
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Before signing Box 11b:
-
All isolations are removed and the Isolation Certificate or Box 7 signed off by
the Area Authority as confirmation that this has been carried out.
OR
-
An Extended Period Isolation (EPI) has been raised where isolations are to
remain in place. The Isolation Certificate must be converted to an EPI by
completing Box 6 of the Isolation Certificate. If Box 7 of the Permit has been
used to authorise these Isolations, a new Isolation Certificate is to be raised by
the Area Authority. He is to write all the details of the Isolation on the
Certificate, and convert it to an EPI by filling in Box 6 of the Isolation Certificate.
The number of the EPI Isolation Certificate is to be written in Box 11b of the
Permit.
When Box 11b has been signed, no further work may take place under that Permit.
6.17
Permit Archiving
The Responsible Supervisor must ensure that Worksite copies of all Cancelled Permits
and associated documents (Job HSE Plans, Certificates etc.) are kept in an archive file
for a period of six months. Other copies of the documents are to be disposed of. There
is to be a separate file for each month, with the documents sorted by Cancelled date.
6.18
Permit Processing Procedure
The following steps summarise the Permit Processing Procedure together with the use
of the Permit Issue Point Facility.
1.
APPLICATION
Permit Applicant
EXAMINE
Worksite to check work and identify hazards (except for Class B Permit at
remote sites with no risk from overhead lines, buried services etc)
COMPLETE
Permit Applicant's parts of the Permit.
COMPLETE
Permit Applicant's parts of PTW System Certificates (Isolation, etc.) and
attach to Permit.
PRODUCE
Job HSE Plan and attach it to Permit.
GIVE
Completed documents to Responsible Supervisor.
2.
PLANNED PERMITS
Responsible Supervisor
CHECK
Permit Applicant’s details and dates proposed for work.
ENTER
Permit details into Work Tracking System as a planned Permit.
EXAMINE
Worksite with Permit Applicant, if required (Class A), to confirm protection
and precautions are suitable for the conditions.
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3.
AUTHORISATION
Revision 6.1
Effective: Dec-08
Responsible Supervisor
CHECK
Permit has been entered into Work Tracking System as a planned Permit.
CHECK
Correct certificates are attached.
Permit and Certificate boxes are correctly completed.
If another custodian is affected.
Job HSE Plan is correct for the work.
IDENTIFY
If an Isolation is required and nominate competent person to identify
isolation points (Senior Foreman / Electrical Competent Person).
SET
Authorisation period for Permit.
SIGN
Permit and Certificates to Authorise them.
GIVE
Permit and certificate copies to Permit Applicant (keep white copy in file).
CHANGE
Permit status in Work Tracking System to Authorised, having checked for
possible conflicts with other work.
4.
Permit Applicant
BRIEF
The Permit Holder on the work and Hazards.
GIVE
Permit, Certificates and Job HSE Plan to Permit Holder.
5.
Page 50
PREPARATION
PREPARATION
Area Authority
OBTAIN
Permit and Certificates from Permit Holder, place in the Authorised
section of the Permit Rack.
CHECK
Permit is Valid on Work Tracking System listing or agreed for prevalidation.
WRITE
Any isolation details on the Isolation Certificate and tag labels.
CHECK
For any conflict if the isolation or work is done. Do not allow the isolation
or work to proceed if there may be a safety conflict.
DO
The isolation, attaching chains and labels.
RETURN
To the Permit Issue Point.
SIGN
The Isolation Certificate and tag label stubs.
PLACE
Tag label stubs and Isolation Certificate in the Authorised section of the
Permit Rack with the Permit.
MARK
The isolation on the location board with correct colour pegs and labels.
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6.
VALIDATION
Area Authority
CHECK
Any isolations are correctly displayed on location board and signed up on
the certificate.
CHECK
For any conflicting work on the Permit Location Board.
CHOOSE
A marker from the board and write its number on the top of the Permit.
INSPECT
The worksite with the Permit Holder (if required) taking the Permit and Job
HSE Plan with you.
PREPARE
Worksite as required by Job HSE Plan.
CHECK
All preparation controls on the Job HSE Plan are in place, initialling each
control in the Area Authority section of the Job HSE Plan.
SIGN
The Permit to VALIDATE or PRE-VALIDATE it
OBTAIN
Permit Holders signature to ACCEPT the Permit and Job HSE Plan.
GIVE
The RED/BLUE Permit and YELLOW isolation certificate copies to the
Permit Holder to display at the worksite.
RETURN
To the Permit Issue Point.
PLACE
The marker previously chosen on the location board, at the location of the
worksite.
PLACE
The GREEN Permit copy in the VALIDATED section of the Permit Rack
with GREEN Certificate copies and isolation tag label stubs.
7.
BRIEFING
Permit Holder
BRIEF
The work party on the job, the hazards, the precautions and the actions to
take in the event of an emergency.
PLACE
The RED/BLUE Permit copy, Job HSE Plan and YELLOW isolation
Certificate copies in the wallet and display it at a prominent position at the
worksite.
THE WORK MAY START AFTER THE PERMIT HOLDER HAS FULLY
BRIEFED THE WORK PARTY AND DISPLAYED THE PERMIT
8.
Page 51
SUSPENSION (activities close to Permit Issue Point)
Permit Holder
CHECK
The work site has been left clean and safe.
RETURN
The Permit to the Area Authority at the Permit Issue Point.
SIGN
Both copies of the Permit in Box 10c.
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9.
SUSPENSION (activities at remote site)
Permit Holder
CHECK
The work site has been left clean and safe.
SIGN
Top copy of the Permit in Box 10c.
RETURN
The Permit to previously agreed return point.
INFORM
Responsible Supervisor of Permits and pre-validations required for next
day (May be done by the Applicant)
10.
SUSPENSION (activities close to Permit Issue Point)
Area Authority
CHECK
Permit Holder has signed Permit Box 10c and, for work in Process
Facilities, has left his worksite clean and safe.
PLACE
Both Permit copies in the SUSPENDED section of the Permit Rack.
REMOVE
The marker from the location board.
NOTE: If the job has not finished, the marker should be put where it can be used for the
same Permit again and not used for another Permit.
11.
SUSPENSION (activities at remote site)
Area Authority
REMOVE
Green copy of Permit from Permit Rack, write in Box 10c “Remote Site”.
PLACE
Green Permit copy in the SUSPENDED section of the Permit Rack.
REMOVE
The marker from the location board.
COLLECT
Top copy of Permit from agreed collection point (next day).
PLACE
Both Permit copies in the SUSPENDED section of the Permit Rack when
next at the Permit Issue Point.
THE WORK HAS NOW STOPPED IF WORK IS COMPLETE, GO TO STEP
14.
IF THE WORK IS CONTINUING: PERMIT HOLDER WILL RETURN FOR
NEXT WORKING PERIOD.
IF PERMIT HOLDER HAS CHANGED, A FULL BRIEFING BY APPLICANT
OR PREVIOUS PERMIT HOLDER SHOULD BE GIVEN
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12.
RE-VALIDATION
Revision 6.1
Effective: Dec-08
Area Authority
CHECK
Work Tracking System list to see that the Permit is on today's list of Valid
Permits.
CHECK
Any isolations are still correctly displayed on Permit Location Board.
CHECK
For conflicting activities on Permit Location Board.
TAKE
Both copies of the Permit and certificates from the rack.
INSPECT
The worksite with the Permit Holder, if required.
CHECK
Requirements of Job HSE Plan are being met.
SIGN
Both copies of the Permit Box 10a to RE-VALIDATE or, PRE-VALIDATE it
OBTAIN
Permit Holder's signature in Box 10b to ACCEPT the Permit.
GIVE
RED/BLUE Permit copy to the Permit Holder to display at the worksite
with the job HSE plan (after checking it is still valid) with the YELLOW
Isolation Certificate copy.
RETURN
To the Permit Issue Point.
CHOOSE
The marker from the board that has the same number as the number on
the top of the Permit.
PLACE
The marker at the location of the worksite, on the Permit location board.
PLACE
GREEN Permit copy in the VALIDATED section of the Permit Rack with
GREEN certificate copies and isolation tag label stubs.
13.
BRIEFING
Permit Holder
BRIEF
The work party on the job, the hazards, the precautions and the actions to
take in the event of an emergency.
PLACE
The worksite copy of the Permit, Job HSE Plan and Certificate copies in
the wallet and display it at a clear position at the worksite.
WHEN THE JOB IS COMPLETED
14.
CANCELLATION
Permit Holder and Area Authority
Permit Holder
Page 53
CHECK
That the worksite has been left clean and safe.
RETURN
The Permit to the Area Authority at the Issue Point
SIGN
Both copies of the Permit in Box 11a to Cancel it
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Area Authority
CHECK
Permit Holder has signed the correct Permit Box and left his worksite
clean and safe.
PLACE
Permit copies in the SUSPENDED section of the Permit Rack
REMOVE
The marker from the location board.
CHECK
That it is safe to de-isolate, if applicable, and that this will not conflict with
other isolations.
OBTAIN
Authorisation to de-isolate, if applicable.
REMOVE
Small third part of tag from tag label stubs.
DO THE
De-isolation, checking tag labels against third part of tags, returning
chains, labels and cable ties and checking the worksite is left clean and
safe.
CHECK
Tag labels match the tag stubs in the rack.
SIGN
Isolation Certificate for de-isolation complete.
REMOVE
Isolation pegs and labels from location board.
SIGN
Permit box 11b to Cancel it.
RETURN
Permit to the Responsible Supervisor for Archive.
15.
6.19
ARCHIVE
Responsible Supervisor
ENTER
The status as Cancelled in the Work Tracking System. The system will
automatically Archive all Cancelled Permits when the Archive icon is
selected.
RETAIN
The worksite copies of the Permit and Certificates and the Job HSE Plan
in a safe place for 6 months.
Permit Validation Exceptions
For restricted work categories in Seismic and Electrical works in remote locations (such
as the passage of seismic crews under overhead lines), the permit validation from the
Area Authority is able to be faxed provided the Permit Applicant and Area Authority
agree that it is appropriate to do so.
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7
Control of Isolations
7.1
Isolation Requirements
Revision 6.1
Effective: Dec-08
The following requirements apply to all isolations.
7.1.1
Competency
The Responsible Supervisor must ensure that the person nominated to do an
Isolation/De-Isolation is competent for the task.
7.1.2
Security
Each isolation is to be secured in the required position so that the accidental release of
the energy source (or obstruction of draining/venting) is prevented.
7.1.3
Labelling
The isolation is to be labelled with a high visibility “Isolation Label” so that anyone can
immediately see why an isolation is in place, and should not be tampered with.
7.1.4
Recording
Isolations are to be recorded in Box 7 of the Permit for the work requiring it, or, for
complex isolations, on an Isolation Certificate. For complex isolations, marked-up P &
IDs or line diagrams should be attached to the Isolation Certificate. The only exception
is Unrecorded Isolations, as described in 7.6.
7.1.5
Visibility and Co-ordination
The Area Authority must record all isolated equipment on the Permit Location Boards
(See Section 8). This is done to help the Responsible Supervisor and Area Authority to
ensure that equipment is only isolated or de-isolated when it is safe to do so.
7.2
Electrical Systems
All electrical isolations are to be done in accordance with the Electrical Safety Rules
(ESRs) and Electrical Safety Operational Procedures (ESOPs.)
7.3
Mechanical Systems
Mechanical Isolations are to be done in accordance with PR-1076 – Isolation of Process
Equipment.
7.4
Approval for Isolation
All isolations, except Unrecorded Isolations, must be fully described in Box 7 of a Permit
or an Isolation Certificate. All documented mechanical Isolations are to be authorised
by the Responsible Supervisor, who must define the isolation point and sign either Box
7 of the Permit, or Box 4 of the Mechanical Isolation Certificate. Electrical Isolations are
to be approved in accordance with the requirements of Electrical Safety Rules (ESRs)
and Electrical Safety Operating Procedures (ESOPs).
7.5
Permits for Spading
When it is necessary to fit blanks or spades to isolate equipment, a separate Permit is
required to ensure that the isolation of vessel or system is controlled properly before the
work on the vessel/system can start.
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7.6
Revision 6.1
Effective: Dec-08
Unrecorded Isolations
It is not necessary to record mechanical isolations on the Permit or Isolation Certificate
if BOTH of the following conditions are met:
a.
The isolation is to be done by a competent person from Operations
Department, nominated by the Responsible Supervisor, for the purpose of
calibration or minor repair/replacement work that he will do himself, and
b.
The isolation will be removed before the end of the working period.
Minor repair/replacement work is work that can be done without the person doing the
work leaving the worksite. Examples are pressure gauge replacement, isolations for
faultfinding etc. In this situation, the requirement for Isolation is to be included in the
Work Description on the Permit.
7.7
Isolation Process
7.7.1
Isolation
When the isolation has been approved by the Responsible Supervisor, the Permit
Holder is to take the Permit and Isolation Certificate, if applicable, to the Area Authority
or appropriate Electrical Person, to request isolation.
The Area Authority or Electrical Person is then to:
7.7.2

Check the Permit Location Board to ensure that the isolation will not conflict
with any other work.

When satisfied that it is safe to isolate, do the isolation, tagging and securing of
the valves/switches etc., as required by 7.7.2 and 7.7.3.

Prove that the isolation has fully isolated the systems and equipment from
pressure/electricity as required by 7.7.4.

If part of the isolation is at a remote location under the control of another Area
Authority, fax a copy of the Isolation Certificate to that location and obtain a
return fax with a signature that the remote isolation is complete.

Sign the Permit (Box 7) or Isolation Certificate to confirm that isolation is
complete. Then add the marker and details of the isolation to the Permit
Location Board.
Tagging of Isolation Points
Every valve, spade, switch, breaker etc. used in an isolation (except for isolations that
do not require Isolation Certificates), must be marked with the correct type of tag label.
Tag labels are used for the isolation of Valves, Spades and Electrical Equipment (The
tag label is shown in the PTW Materials Supply Catalogue).
The tag label has three parts. The first part (the part of the tag with the attachment
loop) is to be attached to the isolation point. The other two parts are to be attached to
the Permit Issue Point copy of the Permit or Isolation Certificate and kept at the Issue
Point until the isolation is removed.
When the isolation is removed the tags that have been removed must be compared with
those at the Permit Issue Point to confirm that all isolations have been removed. The
third part of the tag (the smallest part) is provided to assist in the removal of complex
isolations. This part is kept attached to the middle part of the tag at the Issue Point until
de-isolation is required. The third parts can then be detached and taken to the site by
the de-isolator to ensure he only de-isolates the correct valves/switches.
The tag label is to identify the number of the Isolation Certificate authorising the
isolation, or in the case where the isolation has been authorised through the use of Box
7 of the Permit, the Permit Number.
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Each valve/switch etc. used as part of more than one Isolation Boundary is to have a
tag label for each Isolation Certificate (or Permit.). It is not necessary to fit additional
physical securing for each Isolation Certificate (except where this is required for
electrical isolations by ESRs / ESOPs.)
7.7.3
Securing of Isolations
Mechanical
All valves, etc. used as part of an isolation boundary are to be secured in the required
position using a high visibility securing device, e.g. red/white plastic chain. The purpose
of securing the isolation is to prevent valves from being moved accidentally, and to
show everyone in the area that the valve is being used as part of isolation.
Electrical
All electrical isolations are to be done in accordance with the ESRs and ESOPs.
7.7.4
Proving of Isolations
Whenever isolation is complete, the isolator must prove that the area within the isolation
is fully isolated from pressure/electricity. This can normally be done by checks at vent
valves or by the checks to prove electrical equipment dead required by ESRs/ESOPs.
If it is not possible to check that a pressure system has been de-pressurised without
unbolting a flange, the work party must be made aware of the possible pressure hazard.
The Job HSE Plan must include clear instructions on controlling the unbolting of the first
flange to ensure that any pressure is released before bolts have been removed.
7.8
More than One Permit in an Isolation Boundary
If more than one Permit is to be worked on within the same isolation boundary, the
isolation for each permit is to be recorded, authorised and labelled separately. This will
minimise the risk of an isolation being removed before all work is complete.
7.9
De-Isolation on Completion of Work
When work is complete, the Permit Holder is to sign the Permit (Box 7) or the Isolation
Certificate to request de-isolation. If testing is not required, the Permit Holder must also
sign Box 11a of the Permit to confirm that the work is complete. If testing is necessary
before the Permit can be signed off, the procedure in 7.10 is to be followed.
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The Area Authority or Appropriate Electrical Person shall:
7.10

Check the Permit Location Board to ensure that the removal of the isolation will
not affect the isolation boundary for any other work.

When satisfied that the work is complete and that it is safe to de-isolate, do the
de-isolation. If any of the valves/switches etc. are part of another isolation
boundary, the tag for the current de-isolation is to be removed, but other tags
are to be left in place. The securing device must not be removed until all
isolations on the valve/switch have been removed.

When the isolation has been removed, compare the tags from the
valves/switches with those attached to the Permit/Isolation Certificate to ensure
the De-Isolation is complete. Then remove the marker and description of the
isolation from the Permit Location Board.

If part of the de-isolation is at a remote location under the control of another
Area Authority, fax a copy of the Isolation Certificate to that location and obtain
a return fax with a signature that the remote de-isolation is complete.

Sign the Permit (Box 7) or Isolation Certificate to confirm that the de-isolation is
complete.
De-Isolation for Testing
If testing is required to confirm that the work is complete, de-isolation is allowed before
the Permit is signed in Box 11. In this case, the work description on the Permit must
include a test, and the Permit must be suspended before testing starts.
In addition the sheet on the reverse of the Mechanical Isolation Certificate, should be
completed each time an isolation or de-isolation for ‘Test’ is ‘put on’ or ‘taken off’
When the test is to start, the Area Authority is to de-isolate, using the procedure in 7.9,
except that he is not to sign the Permit/Isolation Certificate until the test is complete and
the equipment is finally de-isolated. If a test shows that more work is needed, and the
equipment is to be re-isolated, the Permit is to be Re-Validated for the work to be done.
CAUTION: This process is not to be used for Hydrostatic or Pneumatic Testing.
7.11
Transfer of Isolations between Permits
If a Permit reaches the end of its Validity Period and work is to continue under a new
Permit, the Isolations can be transferred between the two Permits. Box 11b of the old
Permit is to be signed by the Area Authority to show that work is not complete.
If the isolation was authorised on a Mechanical Isolation Certificate or Electrical
Immobilisation Certificate, the number of the new Permit is to be written in the “Work
continuing on Permit No.” Box” on the Certificate. This transfer can only be done 3
times. The Isolation Certificate number is to be written in Box 11b of the old Permit.
The Isolation Certificate is then attached to the new Permit.
If the Isolation was authorised on in Box 7 of the Permit, the WHITE copy of the old
Permit is to be kept with the Permit Issue Point copy of the new Permit as a record of
the isolation. Box 7 of the new Permit should be marked “See Permit ******** (Permit
No.)
7.12
Extended Period Isolations (EPIs)
7.12.1 Use of EPIs
EPIs are isolations which must remain although no work is being done within their
boundary. They may be required for two main reasons:
a.
Page 58
Where work has started but will be suspended until the Validity Period of the
Permit has passed. For example, when awaiting spares for a repair.
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b.
Revision 6.1
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Where equipment becomes redundant and is to be permanently isolated.
7.12.2 Authorisation of EPIs
The procedure for authorising and documenting EPIs is as follows:
Page 59
1.
Any Permits for work related to the isolation are to be cancelled by the Area
Authority.
The Area Authority is to sign Box 11b of the Permit if the work is not complete,
or is complete, writing in the Isolation Certificate number in the space after
“Isolation retained under Cert. No.”
2.
Where Box 7 of the Permit was used to record the original isolation, an Isolation
Certificate must now be raised and its number written in Box 11b of the Permit.
3.
Where no work is required, but equipment is to be isolated for an extended
period, an Isolation Certificate is to be raised to document the isolation
4.
The Area Authority is to indicate in the EPI section of the Isolation Certificate
the reason for the isolation and the number of any Permit being signed off.
5.
Both copies of the Isolation Certificate and the Isolation Tag Label halves are to
be kept in the EPI section of the Permit Rack.
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8
Permit Issue Points
8.1
Location and Use of Permit Issue Points
Revision 6.1
Effective: Dec-08
Permit Issue Point display equipment is to be provided at each location from which an
Area Authority issues Permits. This equipment consists of a Permit Location and
Isolation Board and a Permit Rack. The Area Authority is responsible for ensuring that
the Permit and Isolation Displays are kept up to date to show the current work in the
Area.
The Permit Issue Point is to be operated in accordance with the Permit Processing
Procedure, which is available at each Issue Point, and is included in 6.18 of this
manual.
8.2
Purpose of Permit Issue Point Displays
The information available on the displays at the Permit Issue Points shows:

Current maintenance and engineering work in the area, so that conflict between
activities can be avoided.

Equipment which is isolated, and not available for operational use.
Isolation boundaries around equipment which is being worked on, which must be kept
secure to avoid damage to equipment and injury to personnel.
8.3
Permit and Isolation Display
The Display is made up of two main elements:
8.3.1

The Permit Rack.

The Permit Location Board and Isolation Display.
The Permit Rack
This is a rack into which Permits and Isolation Certificates can be placed. It is divided
into vertical sections to separate Permits for different areas. These vertical sections are
divided horizontally to separate Permits at each different status, as follows:
8.3.2
a)
Planned:
Permits which have been Authorised, but have not yet been
Validated for work to start.
b)
Validated:
All Permits for which work is actually in progress or prevalidated.
c)
Suspended:
Permits for which work has started but is not currently in
progress and has yet to be finished.
d)
Extended Period
Isolations:
Permit has been Cancelled, but the Isolation is retained for a
justified reason
Permit Location Board and Isolation Display
This is a large plan of a station showing all possible locations for work, together with
outlines of hazardous areas and major items of equipment. It also has boxes to indicate
work in areas outside the station and on wells connected to the station. Wherever
possible, the Board should be attached to the wall of the Issue Point so that the
orientation of the Board and the plant are the same.
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Permit Work and Isolations are marked up on this Board as follows:
Permit Work
The locations of the worksites are shown with coloured magnetic markers indicating the
Class of the Permit.
RED - Class A Permits
BLUE - Class B Permits
Isolations
When equipment is isolated, a red coloured peg is to be inserted in the drawing of that
equipment on the Permit Location Board. A label hung from the peg will show the
Permit/Isolation certificate number. Where there is more than one isolation on
equipment, additional labels will be added. For well isolations, a red peg in the well box
with the well number indicated will show which wells are isolated. If isolation becomes
an Extended Period Isolation, the red peg is to be replaced by a green one.
Markers are also provided to show where Fire and Gas Detection Systems are isolated
/ inhibited for maintenance work, and where there are Radiography and Pressure
Testing activities. The markers are shown in the 'PTW Materials Supply Catalogue'.
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Use of the Work Tracking System
The Work Tracking System is provided to track Authorised Permits to Work, and
performs an essential role in assisting the Responsible Supervisor in the co-ordination
of work his Area. It is not used on Drilling Locations.
9.1
Objectives of the Work Tracking System
The Work Tracking System has the following objectives:
9.2

To provide an integrated daily schedule for all activities in an Area.

To provide a planned Permit listing to assist in planning worksite examinations.

To provide an up to date record of all Authorised Permits in an area.

To allow the Responsible Supervisor to provide a listing of all Permits that may
be validated by individual Area Authorities on a particular day.

To assist in identifying any possible conflicts between activities.
Operation of the Work Tracking System
The Work Tracking System is to be operated in all Responsible Supervisors' areas. The
system is to be used as an element in the control and coordination of work, as follows:

The system is to be used by the scheduler to produce a daily plan for the Area
Co-ordinators daily meeting.

All Permits are to be entered into the system at or before the time that they are
authorised by the Responsible Supervisor. The system will allow details of
planned work to be downloaded into the Work Tracking system from SAP-PM
and the Engineering plan, minimising the need for typed input. Permits will
show the number of the Work Order, or Engineering Work pack, which will allow
Permits to be linked to items on the daily schedule.

Each afternoon the Responsible Supervisor will receive from Permit Applicants
lists of the Permits required to be worked on the next day. He is to examine
these lists, to ensure that no activities will conflict, and to ensure that the
numbers of Permits will be within the limits stated in 4.3.

The Work Tracking listing is to then be updated to indicate all existing and new
Permits to be validated for the next day.

Reports of Permits to be validated are to be printed and given or faxed to Area
Authorities by the Responsible Supervisor, at the start of each day.

When a Permit is brought to an Area Authority for Validation, the Area Authority
is to check the Work Tracking Listing for the Area to ensure that the Permit has
been included on the list for that day. If it is not on the list, he is to contact the
Responsible Supervisor to establish whether that Permit may be validated.
Detailed information on the operation of the Work Tracking System is contained in the
Work Tracking System User Manual.
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10
Permit to Work System Certificates
10.1
Certificates Provided
Revision 6.1
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Certificates are used in the Permit to Work System to provide additional authorisation
and control for a number of activities.
A PERMIT TO WORK SYSTEM CERTIFICATE IS NOT A “PERMIT TO
WORK” AND MUST NOT BE USED TO AUTHORISE WORK UNLESS
IT IS ATTACHED TO AN APPROPRIATE PERMIT TO WORK.
The Certificates used in the system are:

Mechanical Isolation

Confined Space Entry

Excavation (see Operations Excavation Certificate Procedure)

Additional Gas Test Record

Radiography

Electrical Safety Documents:
-
Electrical Isolation
-
Electrical PTW - Safety Rules
-
Limitation of Access - LOA
-
Sanction for Test - SFT
-
Clearance for Work under Overhead Lines - See Electrical Safety
Operations Procedures
Colours of Certificate copies:
10.2

Worksite - Yellow

Permit Issue Point - Green
Use of Certificates
10.2.1 Mechanical Isolation Certificate
This Certificate is shown in Appendix 3 the use of the Certificate in the isolation process
is covered in 6.5.1. A brief description of its use is given below:
Application - Box 1
Box 1 is to be completed by the Permit Applicant, giving the details of the job and the
covering Permit number.
The Box marked ‘Work Continuing on Permit No’ is to be used when a Permit passes its
expiry date, but work will continue under a new Permit allowing the Isolation Certificate
to be transferred to a new Permit.
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Reason for Isolation - Box 2
The Permit Applicant is to write here the reason why the isolation is required.
Details of Isolation - Box 3
The Responsible Supervisor is to write in Box 3 the details of all isolation points,
indicating whether valves are to be open or closed, and places where spading or
disconnection is required.
Isolation - Box 4
The Responsible Supervisor shall sign Box 4 to authorise the Isolation.
Authority shall sign Box 4 when the Isolation is complete.
The Area
De-Isolation - Box 5
The Permit Holder shall sign Box 5 to request de-isolation. The Area Authority shall
then sign to authorise de-isolation. Once the de-isolation is complete, the person who
did the de-isolation shall sign this box to show that de-isolation is complete. He should
also complete the “De-Isolated position” box to show the “as left” status of the valves.
De-Isolation For Test – Reverse of Permit
On the reverse of the Mechanical Isolation Certificate is a sheet for use when Deisolation/Isolation For Test is required (see 7.10)
Extended Period Isolation (EPI) - Box 6
This box is to be used when isolation is still required after its associated Permit is
cancelled.
The “EPI ON” Section is signed to authorise the EPI when a Permit is to be cancelled,
with the Isolation remaining.
The “EPI OFF” Section is to be used when work can continue, and the Isolation
Certificate is to be attached to a new Permit.
10.2.2 Confined Space Entry Certificate
The Confined Space Entry Certificate is shown in Appendix 4.
A Confined Space Entry Certificate is required whenever entry is made into vessels or
other confined spaces where there may be:

Toxic or flammable gases or vapours, or

Oxygen content of the atmosphere < 20% by volume.
A Confined Space Entry Certificate is valid for no more than 12 hours. If the work takes
longer than this, a new certificate is to be raised each 12 hours. The first certificate to
be authorised by the Responsible Supervisor, but later ones can be authorised by the
Area Authority.
A brief description of the use of the Confined Space Entry Certificate is given below:
Application - Box 1
Box 1 is to be completed by the Permit Applicant, giving the details of the job and the
covering Permit number.
Safety Precautions Required - Box 2
This is a list of items to be checked by the Responsible Supervisor / Area Authority
before anyone enters the Confined Space. The Responsible Supervisor / Area Authority
sign this box to indicate that all necessary precautions are in place.
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Gas Testing - Box 3
Immediately before first entry to the Confined Space each day the Area Authority is to
test the space for Toxic and Explosive Gases/Vapours and for Oxygen Concentration.
The results of these tests are to be written in Box 3 of the Certificate.
Further testing during the day can be done by any Authorised Gas Tester.
Authorisation - Box 4
Once he is satisfied that the Confined Space is safe to enter, the Responsible
Supervisor/Area Authority is to complete Box 4 to define the period for which the
Certificate is valid, and then authorise the entry to proceed.
Copies of forms in the pad are not in the same sequence as other Certificates. The top
copy is Green and the second copy (worksite) is Yellow. The back of the Yellow copy
has boxes to record additional gas tests, and to record the entry and exit of personnel to
and from the confined space.
10.2.2 Additional Gas Test Record
The Additional Gas Test Record is shown in Appendix 4 (reverse of Confined Space
Entry).
This Certificate is to be used as a continuation sheet when Box 9 of a Permit, or the
Gas Test Record on a Confined Space Entry Certificate, is full.
10.2.3 Radiography Certificate
The Radiography Certificate is shown in Appendix 7.
A Radiography Certificate is required before an ionising radiation source can be used
for Radiography. Procedures and definitions for handling radiographic sources are
contained in the HSE Manual.
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
Part A is to be completed by the Permit Applicant.

Part B is to be completed by a Radiation Protection Advisor or his Deputy.
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11
Hazard Management
11.1
Objectives
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The objectives of the Hazard Management System are to identify all the hazards
involved with a job and then to indicate controls that must be put in place to enable the
work to be done safely. Hazard assessment is accomplished using the Job HSE Plan.
11.2
Job HSE Plan
The Job HSE Plan System shall be accessed electronically from the PDO Web.
The following Link will bring up the Web Page above Job HSE Plan. For 3rd Party
Contractors who do not have access to the PDO Intranet the page can be accessed
from 3rd Party Job HSE Plan System.
Clicking on Job HSE Plan System shall direct the user to the electronic system.
It is recommended that the Job HSE Plan be produced electronically using the above
application. The process for producing the plan is as shown in Figure 11.1.
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Figure 11.1 – Job HSE Plan Process
A Job HSE Plan shall be developed and printed for each activity being undertaken. The
plan shall be printed and signed by the required signatories and attached to the Permit.
Refer to Figure 11.2 for an Example Job HSE Plan developed from the electronic
system.
If preferred, but not recommended the Job HSE Plan can be printed and completed
manually.
The same applies as to the electronic version; a separate plan is developed for each
activity that is being undertaken.
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Figure 11.2 – Job HSE Plan (Example)
IT IS ESSENTIAL THAT ALL JOB HSE PLANS ARE PROPERLY REVIEWED
BEFORE ANY WORK TAKES PLACE BY THE RESPONSIBLE
SUPERVISOR, AREA AUTHORITY AND WORKSITE SUPERVISOR, TO
ENSURE THAT THEY IDENTIFY ALL HAZARDS AND CONTAIN ALL
NECESSARY CONTROLS.
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12
Training and Licensing Of Permit to Work Signatories
12.1
Training and Licensing of Personnel with PTW Roles
Before being trained in Permit to Work, Responsible Supervisors, Area Authorities, Permit
Applicants, Permit Holders and Gas Testers should be given training in operational safety. This
training should include the mandatory courses stated in PDO document HEALTH, SAFETY
AND ENVIRONMENT SPECIFICATION - HSE Training Specification SP1157 and the
associated pre-requisites together with those required by Contract Documents.
PTW System training and licensing requirements are shown in Table 12.1 below.
Licensing after PTW training is important to ensure that Permit Signatories understand
how to apply the PTW system in their Area.
Table 12.1: PTW Training and Licensing Requirements
TRAINING
LICENSING
Gas Testers
Course
Permit
Signatories
Course
Responsible
Supervisor



Area Authority




(Optional)


POST
Permit
Applicant

Permit Holder
Permit
Holders
Course

Licensed

(Optional)
12.2
Gas Testers
Personnel who have completed Gas Tester Training (with valid Gas Tester card and
record of training in the HSE Training Passport) and appropriate PTW course are
Authorised Gas Testers.
12.3
Training Course Assessment Tests
PTW training courses include formal assessment tests, to ensure that attendees have
achieved the required level of knowledge. Personnel must achieve a set mark in these
tests to pass the course.
12.4
Training Records
Personnel who pass a Permit to Work Training Course will have the course details
recorded in their HSE Training Passport. The Training Custodian will maintain a record
of all personnel trained.
12.5
Licensing Policy
After passing an appropriate PTW Course, everyone who authorises or supervises work
covered by Permit must be licensed by his line management. Licensing is to ensure
that everyone with a safety-critical role in the PTW System is competent for that role.
The Licensing process is to assess a candidate’s knowledge of Hazards and
Procedures in his particular working environment. It is not intended to cover either
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Permit to Work System knowledge (which is assessed in the PTW Training Course) or
Job Competence Assessment.
Job Skill
Competence
Work in Area
Competence
Before Licensing
Licensing Process
PTW
Knowledge
PTW
Application
Knowledge
Quality,
well managed
Permits
Figure 12.1 - Knowledge and Competence for Permit Activities
Figure 12.1 shows how a range of skills and knowledge need to be brought together to
ensure that Permits are well managed.
Referring to Figure 12.1:
Job Skill Competence
This is the technical skill of the person doing the work. Ensuring that people have the
technical skills to do their work is the responsibility of PDO and Contractor line
management, and is not part of the PTW system.
PTW System Knowledge
This is an understanding of how the system works.
training courses.
This is assessed in the PTW
Work in Area Competence
This is an ability to understand, manage and react to the hazards present in the area
where the work is to be done. For example, welding work in a station will have both the
'occupational hazards' and the additional hazard of becoming an ignition source to other
flammable materials in the area. A person involved in the Permit process must
recognise and understand the additional risks. A person’s capability to deal with this
additional risk is assessed during the licensing process.
PTW Application Knowledge
This is the ability to apply what was learnt on the PTW course to real worksite activities.
This is the second issue tested in the Licensing process. The training course intends to
teach the mechanics of the system i.e. how the system itself works. What is required
during licensing is a demonstration that people understand why a Permit is required,
and how they would apply the requirements of the PTW system to the work.
12.6
Licensing of Permit to Work Signatories
12.6.1 Requirement for Licensing
Senior Line personnel are required to formally license people in the PTW roles of
Responsible Supervisor, Area Authority, Permit Applicant and Permit Holder. It is
recommended that Assessment Teams of a minimum of 2 people from relevant
departments in PDO are formed to assist the licensor in his role. Where job competence
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assessment schemes are already in place and documented results of appropriate
competence assessments may be used without separate individual assessments for
licensing purposes. (See 12.7)
Before a licence is issued to an individual:

He must have satisfactorily completed the appropriate PTW Course.

He must have satisfied a licensor that he has the correct level of knowledge of
the Area and PTW System Application. This is done by questioning, as
described in 12.6.3 (or by previous competence assessment, as noted above.)
Questioning on Work in Area knowledge may take place before an individual attends a
PTW Course, to ensure that he will be suitable for the intended role. PTW System
Application knowledge would then be assessed after the course.
Licensing should be done by the personnel indicated in Table 12.2. Records of
Licensing are to be held by the Departments carrying out the Licensing and the Area
HSE Advisor.
To assist conformity, it is suggested that the Licence Record Form shown in Figure 12.2
should be used.
When an individual transfers to another PDO location, it is the responsibility of the new
locations senior line personnel to license the individual for that area. As an example, a
Permit Holder who has successfully been through the licensing process in Fahud and
applies for a license in Yibal, only requires the endorsement of the Production Coordinator in Yibal and a new license card issued. It does not required the full license
panel to convene.
If an individual has a “roving” role (e.g. Metering Specialist, NDT Specialist, Geomatics
survey)) this should be identified on the license for the individual.
If an individual changes employer, this should not affect his license qualifications, or
require any further licensing. The individual should be able to offer his existing license
for immediate replacement
There may be times when a project commissioning team requires regular access to an
existing Operations Asset. As an example, Harweel project may need access to Marmul
wells for commissioning purposes. In this case, the Area Co-ordinator at Marmul may
issue a Commissioning person with a letter of temporary appointment with strict
limitations, to act as an Area Authority for these agreed Marmul Assets only. The Area
Co-ordinator would do this, having satisfied himself that the nominated persons are
knowledgeable of the assets in question, and competent to sign appropriate permitry.
It is also the responsibility of the area licensing panel to maintain a current register of all
personnel licensed for that area.
12.6.2 Assessment Teams
It is strongly suggested that the Assessment Team involve at least 2 PDO personnel. –
one of which is to be an HSE Advisor. The PDO personnel involved are to be familiar
with:

the work area of the candidate

the particular hazards associated with the discipline

PDO Operating and Emergency procedures applicable to the work area
The composition of the Assessment Teams is at the discretion of the Licensor. The
Licensor retains overall responsibility for the issuing of Licenses and maintaining
License Records.
At least one of the Assessment Team members is to be the same level or higher than
the candidate. As a minimum, one Assessment Team member is to have completed the
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PTW Signatories Course in the last 3 years, and the remainder should have been PTW
signatories at some time previously
Table 12.2 suggests the personnel recommended to be involved in the Assessment
Teams for PTW Licensing.
Table 12.2 - Licensing Assessment Teams
Assessment
Role
Production
Representative
Maintenance
Representative
Candidate
Representative
Contract Holder
Representative /
HSE Advisor
INTERIOR
Production
Coordinator
Maintenance
Coordinator
Candidate
Supervisor
Head of
Construction
MAF /
TERMINAL
Senior Terminal
Operations
Supervisor* +
Terminal
Production
Supervisor /
Marine
Supervisor
Head
Maintenance and
Facilities
Upgrade
Candidate
Supervisor
Infrastructure
HSE Advisor
Location
PTW Candidate
Responsible
Supervisor
Area Authority
PDO Permit
Applicant
PDO Permit
Holder
Contractor
Permit Holder
Contractor
Permit Applicant
Responsible
Supervisor
Area Authority
PDO Permit
Applicant
PDO Permit
Holder
Contractor
Permit Holder
Contractor
Permit Applicant
Responsible
Supervisor &
Area Authority
(Drilling)
PDO Drilling
Supervisor*
Head
Development /
Exploration
Drilling
Well Engineering
HSE Team
Leader
* To establish licensing panel – issue, sign and maintain the cards records
12.6.3 Questioning of Candidates for Licensing
Personnel to be licensed are to be questioned to ensure that they are familiar with the
hazards that may be encountered in their work areas, and the precautions necessary to
control them. Questioning should preferably be verbal, so that the licensor can have a
better understanding of an individual’s capabilities. It should include questioning on:
Work in Area Competence
To check their ability to understand, manage and react to the hazards present in the
area where the work is to be done.
PTW Application Knowledge
To check their ability to understand why a Permit is required, and how they would apply
the requirements of the PTW system to their work. The Permit to Work Courses have
assessed knowledge of the way that the PTW process works, and this area does not
need to be repeated during this stage.
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The candidate should be encouraged to use the PTW manual during the interview to
demonstrate their navigation skills.
Questioning should cover the following topics:
Responsible Supervisors and Area Authorities

The plant and equipment in their area, and the processes taking place in that
area.

Co-ordination of work, including interactions between different Permit activities,
and between Permit and Operational activities.

Potential hazards that may arise and the controls that they require.

Relevant Operating Procedures, particularly those covering preparations for
maintenance.

Emergency procedures.
Permit Applicants and Permit Holders
12.7

Knowledge of the hazards associated with the technical content of the work that
they will be supervising.

Knowledge of the potential hazards that may arise in the locations where they
will be working.

Emergency procedures.

Ability to communicate with their workforce in order to deliver Toolbox Talks.
Persons Assessed under an Approved Competence Scheme
Where persons have already been assessed for their role by an approved Competence
Assurance scheme they may be licensed without formally repeating the assessment
testing.
In order to maintain standards and auditability the following minimum requirements
apply to these persons:

The scheme under which they have been assessed must be documented and
approved by the Area Team Leader.

Written records of the assessment tests and the test results must exist.

The assessment testing methods must demonstrate that the person has
acceptable knowledge of the key areas of responsibility defined in the PTW
manual.
License cards may then be issued to personnel who have passed the appropriate
Permit to Work Training Course and who can demonstrate adequate knowledge of the
Area and PTW System Application. The person issuing the license should show on the
back of the license card the limitations within which the licensee may work:
12.8

Responsible Supervisors and Area Authorities are licensed for an Operational
Area.

Permit Applicants and Permit Holders will normally be licensed for a type of
work. However, in areas with a specific hazard, Asset Managers may require
specific licences to cover their area.
License Cards
The License Cards available for use in the PTW System are shown in the Fig 12.3 and
the PTW Catalogue. There are separate cards for each PTW Role.
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For each person who has completed PTW Training successfully the Licensor will have
the following available:

The candidate will have a stamped and signed HSE Training passport showing
which PTW course has been completed and the Licence Application /
Notification from Training Administration of the successful completion of the
PTW course, together with two passport photographs of each individual.

Blank License cards will be available from the Area HSE Advisors.
Following completion and signing, the license cards are to be laminated in a plastic
cover.
12.9
Re-Licensing
Personnel must attend the appropriate Permit to Work Training Course and be relicensed by the Licesinf panel if:

A person who has attended the Permit Signatory Course is required to become
an Area Authority, Permit Applicant or Responsible Supervisor.

A person’s Line Manager believes that the individual would benefit from retraining in order to become re-familiarised with the system.
There is no requirement for a person to be relicensed following attendance at a
refresher course providing his work area and/or discipline have not changed.
12.10 Refresher Training
SP-1157- HSE Specification for HSE Training specifies that refresher training needs to
take place at least every:
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
3 years for Permit to Work Licence Holders.

3 years for Permit to Work Licence Signatories

3 years for Permit to Work Licence Auditors.
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PETROLEUM DEVELOPMENT OMAN
PERMIT TO WORK
LICENCE APPLICATION / NOTIFICATION
FAMILY OR TRIBAL NAME
1ST GIVEN NAME
2ND GIVEN NAME
EMPLOYING COMPANY
COMPANY NUMBER
JOB TITLE
2 PHOTOS
(1 X LICENCE
1 X FILE)
TRAINING PASSPORT NUMBER
TYPE OF PERMIT TO WORK COURSE ATTENDED
DATE PERMIT TO WORK COURSE ATTENDED
PTW INSTRUCTOR NAME
SIG.
AREA REQUIRED
MARMUL FAHUD
NIMR
LEKHWAIR
BAHJA
YIBAL
MAF
QARN ALAM
HARWEEL
*SIGNATORY or HOLDER
DATE
TYPE OF
WORK
REQUIRED*
(APPLICANT
OR HOLDER
ONLY)
MECHANICAL
ELECTRICAL
INSTRUMENT
CIVIL CONSTN.
PIPELINE OPS.
OTHER
HAS THE APPLICANT PREVIOUSLY BEEN FORMALLY LICENCED FOR A PERMIT TO
WORK SYSTEM. IF YES GIVE DETAILS
FOR LICENCING PANEL USE ONLY
LICENCED AS*
TYPE OF
WORK*
HOLDER
APPLICANT
AREA AUTHORITY
RESPONSIBLE SUPVR
MECHANICAL
ELECTRICAL
INSTRUMENT
CIVIL CONTN.
WELL SERVICING
PIPELINE OPS.
OTHER
FOR AREA*
MARMUL
NIMR
BAHJA
MAF
HARWEEL
FAHUD
LEKHWAIR
YIBAL
QARN ALAM
LICENSED BY
SIGNATURE
PDO REF. IND.
LICENCE NUMBER
DATE OF ISSUE
COMPLETED FORM WITH ONE PHOTO
WITH THE AREA HSE ADVISOR FOR
FILE
* DELETE ITEMS NOT APPLICABLE
THE REVERSE OF THIS FORM SHOULD
BE USED FOR ANY NOTES BY THE
LICENCING PANEL
Figure 12.2 - Licence Application / Notification
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13
Permit To Work Monitoring, Auditing And System Review
13.1
Definitions
Monitoring of the system consists of regular checks by supervisors responsible for
managing the operation of the Permit to Work System.
Auditing is a thorough examination of the way the system is operating. The PTW
Audits are done to standard checklists, and must concentrate on examining evidence
relating to the items on the checklists.
System Review is an annual examination of the complete PTW System. It looks at
Audit findings, proposals for change and other relevant information, to assess what
changes are required to the system to optimise its effectiveness.
13.2
Objectives
Monitoring and Auditing of the PTW system is intended to:

Check whether people are complying with the PTW system;

Check whether the PTW system is meeting its objectives;

Identify necessary improvements to the PTW System.
An annual System Review is necessary to:
13.3

Review proposals for change to the PTW system and decide whether these
changes should be made.

Review Audit findings and incident reports to decide whether they indicate a
need for improvements to the system.
Monitoring of the Permit to Work System
When visiting Permit Issue Points and Worksheets as part of their normal duties,
Managers and Supervisors should do spot checks of Permits, which do not need to be
recorded. They should check the following:
Page 76

Are the Permit, Job HSE Plan and any PTW Certificates displayed at the
worksite

Are these documents correct for the work and properly authorised?

Are the precautions required by the Permit and Job HSE Plan adequate and
being complied with?

Do the members of the work party understand the work, and the requirements
of the Permit
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13.4
Auditing of the Permit to Work System
13.4.1 Responsibilities of Personnel Involved in the Audit Process
The key roles in the Audit process are the Auditor and the Audit Authority.
The Auditor is the person responsible for leading the Audit.
The Audit Authority is the person to whom the Audit report is presented, and who is
responsible for corrective actions. The role of the Audit Authority is vital in ensuring that
corrective actions are allocated to individuals and completed.
Their responsibilities are:
The Auditor
Auditors are to have satisfactorily completed the Permit to Work Auditing Course
(LXE046) during the previous 4 years to the audit, and have been involved in using or
maintaining the Permit to Work System in the last 12 months.
Auditors are to prepare the Audit, conduct the Audit effectively and prepare an Audit
Report, which sets out the findings in a concise and readable manner.
Auditors are not responsible for rectifying any problems found. This is the responsibility
of the Audit Authority and the Department(s) being audited.
Auditors are responsible for:

Defining the Audit objectives and communicating them to people involved.

Carrying out the Audit at the stated time, making sufficient time to do the Audit
properly, and Auditing in an alert and courteous manner.

Concentrating on the objectives of the Audit, and not being side-tracked.

Carrying out all the checks required by Audit documentation.

Preparing a written Audit Report.

Submitting the Report to the Audit Authority at the correct time.
The Audit Authority
The Audit Authority is to ensure that Audits take place in accordance with the Audit
Programme, and is to make time to analyse and action the results. The Audit Authority
is responsible for:
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
Ensuring there is a published Audit Programme.

Ensuring there are sufficient trained Auditors for the area.

Ensuring Audit Reports are analysed and actioned.

Ensuring actions are properly tracked and reviewed.
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13.4.2 Types of Audit
Auditing of the PTW System is done at two separate levels. Table 13.1 defines the
Audit Authority, Auditor and Audit Programming and Training Requirements for Level 1
and 2 Audits.
Level 2 – 3-6 Monthly Audits
These audits look at the operation of the complete PTW system in an Area, including
the performance of those who operate the system. The audit is likely to last 1-2 days.
It may be done by auditor(s) from within the area, or by nominated auditors from other
areas.
The Audit Authority is to issue a yearly programme stating when Level 1 audits should
be done, and who will be the Auditors. Level 1 Audits should be carried out between 2
and 4 times per year in each Area. The Asset Manager for the Area is responsible for
defining the audit frequency within these limits, depending on the level of Permit activity
in the Area.
The Audit is to include:

Checks on the operation of the PTW System and the performance of the
personnel required by Audit Forms A -E.

Any other checks on the system considered necessary by the auditor.
Table 13.1: Audit Structure
TYPE OF AUDIT
Level 2
3-6 Monthly
Audit Authority to whom
Audit Report is Presented
Area Operations Team Leader
UOP
Boundary within which
Audit is Conducted
Area
Company
Lead Auditor
Operations Team Leader or Area
Co-ordinator
Qualified Nominated
Individual
Auditors
Area Co-ordinator, Engineering
Team Leader / Co-ordinator or
Safety Advisor. Qualified
Contractor representative
Qualified
Nominated
Individuals
Training of Auditors
Each to have successfully completed the PTW Auditors Course
Publication
Programme
Audit Authority to produce annual
programme
MSE/44 to schedule annual
audit
Presentation of Findings
Report submitted within 1 week
Report submitted within 2
weeks
Review
Actions
Operations Team Leader
UOP/7
Area Co-ordinator
MSE/44
Archivist
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Level 1
Annual
of
of
Audit
Corrective
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Level 1 - Annual Audits
These audits examine all aspects of the operation of the Permit to Work system. They
are carried out to ensure that the Permit to Work is working effectively. The audit is
likely to last 7 -10 days, depending on the size and complexity of the operation. It is to
be done by the Corporate HSE Department.
These Audits are to include:

A check of the frequency, standard and results of Level 1 Audits.

Audits of the system and personnel, using the standard audit forms, to provide
an independent view of whether system requirements are being complied with.

Checks on whether the nominated Custodians for the various aspects of the
system are undertaking their stated responsibilities and whether these
arrangements are adequate.

An examination of PTW Training.

A review of whether the PTW documentation is accurate and adequate.

A review of understanding of, and attitude to the system, by personnel
operating it.

Examination of arrangements for the appointment of signatories, and whether
satisfactory controls are in place.

Examination of the arrangements for system review.

Any other checks on the system considered necessary by the auditors.
Any of the standard audit forms may be used to assist in the audit.
13.4.3 Audit Organisation
Audit Numbering
Each Level 2 Audit is to be given a 3-part reference number on the Audit forms,
including:

A site or department identifier.

The last two digits of the year in which the Audit is done.

A number from 1 upwards each year to identify the individual Audit.
These 3 parts are to be combined into a single identifier e.g. Fahud/98/03.
13.4.4 Conduct of the Audit
To provide a proper assessment of the operation of the PTW system, the Audit must be
recognised as important by both Auditors and those being audited. Those who are
subject to Audit should show active participation by co-operating with the Auditor in
giving time to the Audit, when required. They should provide the Auditor with sound and
reasoned responses to Audit questions.
In order to achieve this, the importance of Auditing is stressed during PTW training
courses. This importance should also be emphasised during Safety Meetings,
particularly those where corrective actions are reviewed.
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13.4.5 Audit Reporting
Audit Reports

Reports on Level 1 audits should be submitted to the Audit Authority.

The essential features of audit reports are that they should:

Be brief, concentrating on significant finding of the audit.

Separate non-compliances from observations.

Recommend corrective actions and action parties.

Be presented to the Audit Authority for approval of the recommended actions
and action parties.

Be signed by the Audit Authority. It then becomes a formal statement of actions
required.

Be distributed to all action parties and the Area Co-ordinator of the Audited
Area.

The report should be distributed to:

Audit Authority.

Area Co-ordinator.

Area Safety Supervisor.

PTW System Custodian.
Corrective Action
In assessing whether an audit finding is a non-compliance, requiring corrective action to
be taken, auditors should bear in mind the definition of a non-compliance, which is:
“A deviation of unacceptable magnitude from the defined standard which, unless
corrected, may lead to a break down of the system.”
Where auditors find isolated minor non-compliances, which are not repeated either by
the individual involved or in the area audited these should be pointed out to the
individuals involved, but they should not constitute non-compliance.
Non-compliances should be categorised under headings such as:

PTW System Operation.

PTW System Requirements.

PTW System Documentation and Hardware.

PTW Training.

HSE Awareness.

Competency.

Motivation.

Information and Communication.

Management and Supervision.

Management of Contractors.
The Audit Authority is to ensure that all corrective actions required by Audit Reports
have been properly actioned and are subject to regular monitoring.
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13.4.6 Audit Archiving
Audits for each Audit Area are to be kept in an archive to ensure that:

A record of corrective actions required is kept.

Other Auditors can examine the records and ensure that Audits have been
done correctly and that corrective actions have been taken.
Archives are to be managed as follows:
13.5

For each area, a post is to be nominated to maintain the Audit archive.

The archive is to contain the Master Copy of all Audits for the Area.

The Audit Report (Audit Form A), together with all supporting Audit forms and
documents collected during the Audit are to be archived.

The Archive file should include a list of all Audits it contains.

The Archive is to be kept in a secure location.

Audit reports should be held in the Archive File for 12 months.
Review of the Permit to Work System
13.5.1 Frequency and Objectives
The PTW System Custodian is to arrange for the system to be reviewed on an annual
basis. The objective is to ensure that any changes required to the system, or its
operation, are incorporated.
13.5.2 Review Mechanism
The PTW System Custodian should conduct the review in conjunction with appropriate
personnel from areas operating the PTW System and other involved parties such as the
Training Custodian.
The review is to deliver recommendations for changes to the system, based on
consideration of the following:

Audit Reports.

Incident Reports.

Proposals for Change.

Changes to appropriate industry guidance documents.

Changes to Company Organisation.
Copies of the recommendations from the review should be circulated for agreement
prior to being implemented.
All resulting changes to the Manual or other documentation are to be done in
accordance with appropriate document control procedures.
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13.6
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Permit to Work System Audit Forms
The following audit forms are enclosed:
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
Audit Form A -Compilation of Findings

Audit Form B -Interview Area Co-ordinator

Audit Form C -Interview Responsible Supervisor

Audit Form D - Interview Area Authority

Audit Form E-Interview Permit Applicant

Audit Form F - Examine Worksite and Interview Permit Holder.
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14
Change Management
14.1
Proposals for Change to the Permit to Work System
If you think that the Permit to Work System can be improved, fill in a copy of this form
and send it through your Line Management to the PTW Custodian (UOP/7)
Alternatively, you can send your proposal to UOP/7 by e-mail.
Table 14.1 Proposals for Change to the Permit to Work System
INSTALLATION/AREA:
CHANGE PROPOSED BY:
POSITION:
SIGNED:
DATE:
PROPOSAL FOR CHANGE:
REASON FOR CHANGE:
“COMMENTS/PROPOSAL
(LINE DEPARTMENT)
SIGNED:
FOR
ACTION
DATE
ACTION BY UOP/7
SIGNED:
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DATE
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15
Details of PTW System Operation
15.1
Fault Finding
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15.1.1 Fault Finding Work
Where checking is performed for the purposes of fault finding, so long as no work is
involved that falls into an Activity requiring a Permit, the checks can be performed
without a Permit as stipulated in the PTW Manual 3.6. Examples include such checks
as examination of vibration switches which appear not to be functioning by knocking the
switch and observing any output. Should the checks indicate that further work is
required which does require a Permit, such as opening a live electrical junction box,
then this work must be done under a Permit.
Electrical Fault Finding
Fault finding on live electrical circuits requires a Class B Permit where the work is in a
Process Facility (i.e. not on an Asset that is under the Custodianship of the Electrical
Persons.) This work must be done in accordance with the ESRs, with a gas test where
required by 3.6 of the PTW Manual.
Fault Finding - Rules
15.2

The work must not include fault finding activities of a non-routine nature, or any
activities that may produce an unsafe situation. This includes all activities listed
as requiring a Permit. In particular this means that a Permit will be required if
hydrocarbon lines are breached to remove valves, or if live (non-IS) electrical
junction boxes in hazardous areas are to be opened.

The work is to be supervised by the Area Authority, even where the work is
being done by personnel from another department.

The Responsible Supervisor must advise the Area Authority of any potential
hazard, or effects on other parts of the process, particularly, where valve
operations are concerned.

Once the fault has been found, a Permit should be raised to put it right, if the
type of work requires it.
Construction Work
15.2.1 Construction Work Close to Existing Facilities
Construction work, including the construction of new pipelines, within the Hydrocarbon
Area surrounding an existing facility normally requires a Permit.
Some major construction programmes within the Hydrocarbon Area around existing
facilities may be controlled better by a job-specific HSE plan that addresses all the
hazards and their controls than by the PTW System. The Responsible Supervisor may
decide that the PTW System need not normally be applied to this type of work, if he has
agreed the job-specific HSE Plan.
However Permits will be required for:
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
Any work within a hazardous zone;

Work (such as trenching or lifting) which could directly affect the facility;

Work requiring a Class A Permit.
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Further details of the precautions necessary when working on pipelines are contained in
GU-501 Guidelines for Excavating and Working Around Live Pipelines.
15.2.2 Hook up, Un-Hook and Re-Hook of Wells
When new wells are hooked up, provided the closing spools are fabricated and welded
off the site, then no Permit is required. Laying sleepers, connecting up spools,
hydrostatic testing and providing the flowlines require a Class B Permit. Removal of
spades at the Xmas tree and manifold for final handover to production, using
documented handover procedures also requires a Class B Permit.
The disconnection and re-hook up of existing wells requires a Class B Permit, unless it
is necessary to cut flowlines. Cutting of flowlines requires a Class A Permit.
Engineering construction work for hooking up new wells may be multi-disciplined
involving electrical, instrument, civil and mechanical works. Where a single Permit
Holder is licensed for all disciplines and the Job HSE Plan(s) adequately cover each
discipline's work, they may be authorised on a single Permit. It is important that the
Permit Applicant and Responsible Supervisor discuss such plans in advance to agree
the number of Permits that will be applied to a specific well location. For example it may
be agreed to include all works on three separate Permits; one for civil, mechanical and
instrument work, a second for electrical work under a different Permit Holder and a third
for Commissioning with a Commissioning Engineer as Permit Holder.
15.3
Seismic Work
Seismic crews generally operate in areas remote from existing facilities and are not
subject to the PTW System in such areas; however their area of coverage sometimes
extends close to or in exceptional cases even through existing facilities. The following
notes apply to Seismic operations close to or inside production and electrical facilities.
15.3.1 Overhead Line Clearance
The following rules apply to work close to live overhead lines:

PR-1242 – Activities in the Vicinity of Overhead Power Lines gives required
Horizontal & Vertical Clearances (Typically, 3 m Horizontally and Vertically)

Clearance Certificate is required which is authorised by the Asset Custodian.

Passage by or under the overhead line requires an 'Overhead Line Clearance ',
which is not an Electrical Safety Document and so a Permit is required.

If Work is conducted under or near the Line a 'Limitation of Access' may be
required and supervision of the work by a Competent Electrical Person is
required.

If it is possible for machinery to come into contact with Overhead Lines, a
Permit is required under Activity 9.1.
15.3.2 Hazardous Areas
Outside Process Facilities and Hydrocarbon Areas, Seismic Geophone use does not
require a Permit.
In Process Facilities and Hydrocarbon Areas the use of Geophones requires a Class B
Permit. This is Hot Work and a gas test will be required (on day of work) before work
starts and possibly at other times e.g. before energising system if later in day.
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Seismic Operating Procedures, which clearly define limitations of access close to all
facilities (flowlines, pipelines, wells etc.) are acceptable as adequate control for vehicle
access purposes when vehicles are outside Hazardous Areas (as defined in ERD 0901) and not close to Overhead Lines (as defined in ESOP 20.)
15.3.3 Seismic Activities Which Require Permits
When a PTW is required for seismic activities, the requirements of the PTW System
Manual are to be followed.
When Overhead Line Clearance does require a Permit, the Responsible.
Supervisor/Area Authority is the Electrical Custodian not Production Ops. Staff and the
responsibility for site supervision during any works are detailed in SP-1108 22 Electrical
Safety Operating Procedures (ESOP-22 Live Line Working and Live Line Washing
Practices.
Seismic activities in areas where Permits are required will normally be Class B work
(See 3.6) Gas Testing may be done by an Authorised Gas Tester from the Seismic
Crew. The Permit details will stipulate the required frequency of gas testing and the
acceptance limits on specific gases within which work can be conducted.
Generally when the hazard is fixed and does not change in location or time (e.g. fixed
electrical lines) the site examination can be done once and at any time prior to work
starting. When the hazard is not fixed in location or time (e.g. possible hydrocarbon
release) the precautions shall be applied immediately prior to, and if necessary
repeated during, the work.
15.4
Geomatics Survey Work
15.4.1 General Survey Work
Survey crews are required to operate any where within the concession areas, but vast
majority of the work (> 95%) normally falls outside process facilities. In a basic term, the
main tasks involved in this survey are mainly to determine the positions of natural and
man-made features and represent them in the form of maps and to demarcate positions
of intended features for development. The types of equipment used are either
conventional optical instruments, the more modern electro-magnetic instruments or the
latest satellite based positioning system (GPS). Where electrical power is required to
run the instrument, this is normally supplied by low voltage internal batteries e.g. 7.2v
for GPS and 4.8v for electro-magnetic equipment. Therefore these activities are
generally not subject to the PTW system.
The main types of activities undertaken by Geomatics survey operations include the
following:
Geodetic surveys: - To establish reference control network by placing permanent survey
monuments or markers on the ground to be used for subsequent/future survey works.
This covers extensive areas, ranging from a few kilometres to several hundred
kilometres.
Topographic and engineering site surveys: - This involves a detailed survey of all
features within a pre-defined area of interest, including ground elevations at regular grid
intervals to define its topography, usually for development purposes.
Route Surveys: - Similar to site surveys, but linear in extent. Mainly undertaken in new
development areas for installation/construction of new pipelines, cables, roads or any
other linear facilities. However routes may run within 5-10m of existing pipeline/flowline
routes when joining existing facilities. Route points are marked on the ground using iron
bars at suitable intervals (normally 500 m), and all features within a defined corridor
(normally 50m) are surveyed.
Drilling site survey supports: - First stage involves a preliminary investigation of the site,
including staking out of the proposed well location. After completion of site construction
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a final survey of the cellar location plus other features within the site is conducted. The
location can be in a remote, virgin area (especially exploration location) or within a
congested producing field.
As-built surveys: - This covers the surveying of any new features after they have been
installed / laid on/in the ground so that their exact positions are known (and mapped) for
future reference.
15.4.2 Surveying Activities Which Require Permits
When a PTW is required for surveying activities, the requirements of the PTW System
Manual are to be followed. Survey activities in areas where Permits are required will
normally be Class B work (see 3.6).
15.5
Pipeline Work
15.5.1 Right of Way Certificate
Third Parties sometimes require access to PDO sites to do work for customers outside
PDO. For example, construction works for Government Departments that occurs within
the Right Of Way (ROW) along PDO main Pipelines. In this situation, neither the
Government Department, nor the Contractor performing the work, is working for PDO.
PDO has, however, the right to check the work planned and to insist on precautions to
be taken to safeguard PDO's assets. This formal agreement from PDO is given in a No
Objections Certificate (NOC), which will be used together with a suitable cover sheet
and the work plans, instead of a Permit.
The stipulations agreed to in the NOC will be sufficient to safeguard PDO's assets.
Further details of the precautions necessary when working on pipelines are contained in
GU-501 Guidelines for Excavating and Working Around Live Pipelines.
15.5.2 Casasco Pit Entries
These do not require a Confined Space Entry Certificate to accompany the Class B
Permit. Any Authorised Gas Tester may do the gas testing, with the results recorded on
the Permit.
15.6
Work In Operational Areas
15.6.1 Safety System Overrides
Overriding of Station Fire Detection2 system when undertaking welding in new
construction areas is sometimes necessary to avoid a station trip caused by the “ultra
violet (UV)” radiation released during the welding operation. There are three separate
cases depending on the location of the Work:
2
Refer to PR-1001c – Temporary Override of Safeguarding Systems for more details.
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Work more than 50 m from a Process Facility
The work is being done more than 50m away from the Process Facility, so a Permit is
not required. A request for Safety System Override to be raised and the Operator will
log this in his Override Log. He will also use the Permit Location Board to indicate the
Safety Overrides that he has put in place. He will use the square Safety Override
Marker together with a Red Isolation Pin and a label attached stating brief details of the
Override. It is essential that close liaison between the Operator and Work Party is
maintained to ensure work doesn't start before the Override is in place and that the
Override is removed as soon as work is completed.
Work within 50 m of an Operating Facility
In this case a Permit is required for work in a Hydrocarbon Area. The Permit should
have an Override request form attached to it. The station operator (Area Authority) will
log this in his Override Log and use the Permit Location Board to indicate the UV
Overrides that he has put in place. He will only validate the Permit after he has
overridden the UV System. When the Permit is suspended he will reinstate the UV
System.
Permit Work on an Adjacent Facility
This case relates to a situation where two facilities although physically close, are under
the control of separate Area Authorities, e.g. Fahud MLPS, Water Injection and NOCS
Plants.
Work within one area requires a Permit Validated by the Area for the location of the
work. The Permit should additionally state on the Override request form attached to it,
the requirements for UV System overrides on the adjacent facility.
The Area Authority for the adjacent facility will sign the Permit in Box 5 as the Other
Affected Custodian, log the overrides in his override Log and use the Permit Location
Board to indicate the UV Overrides that he has put in place.
The Area Authority for the area where the work is being done, will only Validate the
Permit when he has received confirmation that the overrides are in place.
When the Permit is suspended he will tell the other Area Authority to remove the UV
System overrides.
15.6.2 Installation, Replacement and Optimisation of Beam Pumps
Installation of New Beam Pumps
This work can be done using a Class B Permit, provided the appropriate lifting
precautions are specified in the Job HSE Plan. The work involves the following:
1.
Pressure testing, and tying in the flow line at the well end requires a Class B
Permit.
2.
Welding cable tray supports requires a Class B Permit (unless the well is in a
Process Facility, when a Class A Permit is required.) However if the electric
cables are laid in a standard position, this could be done away from the site
before the pump is placed in position and would then not require a Permit.
3.
The above activities can all be done on one Class B Permit, Activities 1.1, 6.7
and 10.2.
4.
The next job is tying in the flow line at the manifold end; this should be a
separate Class B Permit, Activity 6.2, which may be combined with Activity 10.2
to complete the commissioning of the pump.
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Replacement of Beam Pumps
Replacement of existing beam pumps after a well workover is to be Class B work,
Activity 6.2
Beam Pump Optimisation Work
This work is to be Class B work, Activity 6.7.
Flowline Leaks
Where the Area Authority and Responsible Supervisor classify the leak as minor, it is to
be isolated and a Class B Permit Activity 6.7 raised for a clamping repair only. No hot
work of any sort is to be included in this type of clamped repair.
Beam Pump Stuffing Box Repairs
These are to be done under a Class B Permit Activity 6.7.
15.6.3 Well Cellar Entries
These require a Confined Space Entry Certificate to accompany the Class B Permit.
Any Authorised Gas Tester may do gas testing. A separate gas test is to be conducted
at each entry and recorded on the Confined Space Entry Certificate or Additional Gas
Test Record sheet.
15.6.4 Replacement of Relief Valves
Although this is a routine job, it involves breaching a pressurised hydrocarbon system. It
therefore requires a Class B Permit Activity 6.2. If the system remains live with no relief
valve protection during maintenance, this is also Activity 5.1, which means that a Class
A Permit is required if the work is in a Process Facility. The method of managing this
work is shown below:
Procedure for Controlling the Replacement of Relief Valves.
1.
The planner in Fahud / Marmul who compiles the work pack of relief valves to
be changed in a particular station will also be the Permit Applicant for the work.
He will visit the station to examine the worksites when compiling the work pack.
It is not necessary to examine the site again when applying for the Permit.
2.
A Class B Permit Activity 6.2 will be raised to cover all the relief valves in the
work pack, each of which will be identified by tag number on the Permit. If the
work is in a Process Facility, a separate Class A Permit Activities 5.1 and 6.2 is
to be raised to cover any relief valves where the system remains live with no
relief valve protection during maintenance. If required, a separate Permit for
scaffolding will be raised (Activity 8.1)
3.
The following precautions must be stated on the Job HSE Plan:
4.
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
Only one relief valve to be removed at a time.

Area Authority to be in attendance when upstream flange on each relief
valve is broken.
For each relief valve a data sheet is raised which will give details of the relief
valve and the isolation required to replace it. At the bottom of the sheet there is
to be a table, which is signed by the Permit Holder and Area Authority, and
records the stages of the operation i.e.

Remove relief valve and blank flange or remove relief valve and
replace with new tested spare

Remove blank and refit tested relief valve
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To each of these sheets will be attached a Mechanical Isolation sheet. This will
detail the relief valve to be isolated but not the details of the isolation required.
These will be inserted later by the Area Authority.
5.
The Responsible Supervisor will decide with the Area Authority whether a
separate isolation certificate is required for each relief valve or whether a
number of relief valves can be safely changed under one isolation certificate.
The Area Authority will then complete the Isolation certificates.
6.
When Validating the Permit, the Area Authority will agree with the Permit Holder
the order in which the relief valves are to be removed / replaced.
7.
When the work starts, the Area Authority will do the first isolation, remain with
the work party until the upstream flange is broken (to confirm the system is depressurised) and then do the next isolation.
8.
When work specified in 4 above has been completed, the Permit Holder is to
sign the relief valve data sheet and then inform the Area Authority, who will
inspect the work and countersign the data sheet.
On completion the work moves on to the next relief valve in the sequence and steps 7
and 8 are repeated for the next valve in sequence are repeated. The Area Authority will
only remove each isolation when he has signed when stages of 4 are complete on the
relief valve data sheet.
The Permit will be cancelled when all the relief valves in the work pack have been
replaced.
15.6.5 Tank and Vessel Entries
Where a number of tasks are to be done within a tank or vessel by the same work party,
it is not necessary to raise a separate Permit for each task (see 3.6 of the PTW
Manual.). A Class A Permit Activity 2.1 is to be raised for the entry, with the additional
Activities on it (e.g. 6.3 and 6.6 for blasting and painting.) To ensure the correct
precautions are highlighted for each Activity, a combined Job HSE Plan is to be raised
covering all of the work within the tank or vessel.
If someone outside the work party requires access to the tank, they are to be
considered part of the work party for the duration of the inspection. They are to work
under the control of the Permit Holder.
15.6.6 Use of Vacuum Tankers and Delivery Trucks
Vacuum Tanker Discharge of Hydrocarbons
Some Stations have a connection from the Oil-Saver Pit to a point external to the fence.
The tanker discharges into an open funnel with a pit underneath the funnel and the
whole area is effectively a Zone 1 Area. A gas test needs to be performed before the
vehicle enters the area with continuous gas monitoring during discharge. The work
requires a Class B Permit Activity 6.12. If a non-drip connection is used and the tanker
remains outside the hazardous area then the work does not require a Permit.
Use of a Suction Tanker
If the vehicle enters an operating facility to empty a pit of hydrocarbons, a Class B
Permit Activity 6.13 is required. If the tanker is collecting hazardous
chemicals/substances then a Class B Permit, Activity 4.1 should be used.
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Delivery of Liquid or Solid Stores by Vehicle to a Station
Vehicle entry to an operating facility normally requires a Class B Permit Activity 6.7.
However, if the vehicle entry is only for the delivery of operational stores, and the
vehicle is under the Area Authority's direction throughout, then the delivery does not
normally require a Permit or an Access Authorisation form. The following conditions
shall be met for a Permit not to be required:

The delivery of goods should be planned and known to the Area Authority.

Offloading is in a safe, non-hazardous, area away from hydrocarbon and
electrical facilities.

The Operator/Area Authority shall directly control the access and movement of
the vehicle.
15.6.7 Trenching Using Hand Tools and Power Tools
Excavation or Trenching using manual Hand Tools down to a depth of 300 mm does not
normally require a Permit. The exception to this being in those Areas or Stations where
there are no documented details of buried services, in this case the excavation is to be
treated similar to a mechanised excavation. Mechanised excavations are to follow PDO
Procedures for Excavation in Operational Areas and a Class B Permit Activity 12.1 is to
be used for all excavations using mechanised or power tools.
15.6.8 Radiography
Radiography in non hydrocarbon areas by certified Radiographers does not require a
Permit. Radiography in a Process Facility or Hydrocarbon Area requires a Class B
Permit, Activity 4.2. In addition where radiography is to be carried out in a process area,
or close to process facilities, the safety systems and any nucleonic level measurement
should be inhibited through the approved route.
15.6.9 Instrumentation Work
Resetting of trips following a station trip comes under the heading of fault finding and
does not require a Permit.
Installation of new equipment not tied into the existing safety/protection systems comes
under Activity 6.7, and requires a Class B Permit.
Work that interfaces with existing protection/safety systems e.g. remedial or
modification work on existing systems or tie in of new systems requires a Permit Activity
5.1 for ESD and Fire & Gas systems, (Class A for Process Facilities, Class B for
Hydrocarbon Areas). Activity 5.2 for Process Control and Machinery Control and
Surveillance (Class B).
15.6.10 Maintenance of Diesel Engines in Remote Locations
Routine maintenance such as filter & oil changes and adjustments comes under the
heading of routine plant checks and does not require a Permit.
15.6.11 15.6.11 Routine Strainer Cleaning
Although this involves unbolting joints on Hydrocarbon lines, it is a standard
maintenance job and the strainers are isolated, depressurised and drained before work
starts. Where the Station Operator is doing this, or is in attendance, it is a routine watch
keeping operation which does not require a Permit.
When it is being done by a contractor, unaccompanied by the Station Operator, and
requires vehicle access for the suction tanker to remove spillage, a Class B Permit
Activity 6.7 will be required.
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15.6.12 Changing of Filters (Air and Lube Oil)
Where the equipment is fitted with dual filters and has change over facilities between
the filters, the work of changing the "Off Line" filter is classed as an Operational Routine
and does not require a Permit.
15.6.13 Plant Condition Monitoring and Integrity Checks
Routine checking of the Rotating Equipment Condition Monitoring systems involves the
use of a 'Micro-Log Data Collector' in Hazardous Areas. Pipeline wall thickness
checking is also being performed with ultra sonic equipment in Hazardous Areas. Since
these equipments are not certified for use in Hazardous Areas, their use falls under
Activity 11.2 which means that Gas Testing precautions should be applied.
If the testing equipment is Certified for the Hazardous Area, then the work will not
require a Permit or any Gas Testing.
15.6.14 15.6.14 Air Conditioning Maintenance
Regular Air Conditioning maintenance in Production Stations involves cleaning out
filters and vacuuming out dust from the condenser units. This involves working within
the control building and also using non-certified electrical equipment outside the control
room within the plant fence. The maintenance staff isolates the system at the main
switch and place a notice on the switch.
So long as the work is in a non-hazardous area then the work does not require a
Permit. For hazardous areas, the work requires a Class B Permit, Activity 6.7. When
preparing the work the applicant should check with the Responsible Supervisor or Area
Authority to ensure that the location is indeed in a non-hazardous area. The use of the
Access Authorisation form will ensure that this check is performed and the Area
Authority will mark his Permit Location board to indicate the location of these personnel.
15.6.15 Remote Site Working
Work at a remote site can be managed from a different Production Station from the one
the system flows to. The Outside Work section of the Permit Location Board will be
used to show this work e.g. Work to remove sand from a 'B-Station' Well cellar is
required however, 'B-Station' is not open but 'C-Station' is open; the Permit can
therefore be issued from 'C-Station'. This situation only applies when the nature of the
work does not directly affect the station process. When Permit work is to take place
inside the station, the station must be under the control of a fully licensed Area Authority
based at the station.
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15.6.16 Wireline and Well Services
Well services operations that are performed by a dedicated well services crew who
operate under approved procedures which include job safety controls do not necessarily
require a PDO Permit to Work. This Activity does not normally require a Permit, if the
well has been formally handed over to the Well Services crew via a transfer procedure
(Well Location Custodianship Transfer Form.) This transfer mechanism, together with
the responsibilities of the well service crew, should be described in a written procedure
and while the well is under transfer no work other than well services work should be
done. It is the responsibility of the Well Services Supervisor to ensure all controls within
the Job safety plan are in place and monitored. The well should be isolated by
Operations, under a mechanical isolation certificate, and attached to the WLCTF. Any
requirement to flow the well should be captured under a de-isolation for test (DFT)
15.6.17 Hand and Spray Painting
Process Plant
Painting of process plant requires a Class B Permit, as shown in Para 15.5.17.
Painting in Areas controlled by Electrical Departments
Painting in Areas controlled by Electrical Departments requires a Class B Permit as
shown in Para 3.6.2.
Buildings
Painting of buildings located in process or electrical areas may involve working inside
as well as outside a Facility fence. Inside the fence, the work will require a Class B
Permit. Outside the fence, the work does not require a Permit.
15.7
Terminal Operations
15.7.1 Work on Offshore Single Buoy Moorings
Boat travel is a normal means of transport for the work party. The associated hazards
are a part of normal daily work and do not need to be controlled by the Permit to Work
System. Work on Single Buoy Moorings (SBMs) then falls into the following categories:
1.
Work on Offshore SBMs which involves the opening of hydrocarbon systems or
the use of cranes e.g. change of hoses, chains or hawsers. Normally a Class B
Permit with any isolation listed on the Permit, but Class A if hotwork is required
to free shackles etc. Worksite examination only required if Class A work is
involved.
2.
Routine non invasive maintenance work on offshore SBMs. No Permit required.
3.
Other repair work. Use Permit appropriate to activity as shown in 3.6. A
worksite examination is only required if the Responsible Supervisor considers
that the risk warrants it.
15.7.2 Work on Marine Craft Afloat
1.
Routine non invasive maintenance work on marine craft afloat. e.g. weekly
planned maintenance checks. No Permit required.
2.
Non-Routine repair or maintenance work on marine craft afloat. Use normal
PTW activities as shown in 3.6, with worksite examinations as specified in 4.1.
15.7.3 Working Within The Terminal
Routine non invasive maintenance work that does not require any system override or
affect the availability of any safety system. No Permit required.
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1.
Fault Finding. This is low hazard work to find the cause of a defect, but not
necessarily to repair it. No Permit is required if:
a.
The work is done or supervised by a competent person;
b.
The Responsible Supervisor has identified the hazards and given his
authorisation, and;
c.
The work required to repair the fault is minor and does not fall into a
PTW activity and it may be completed under the initial authorisation
without raising a Permit.
NOTE: An appropriate Permit shall be raised if the repair work is more
complex and includes activities requiring a Permit.
2.
Emergency Breakdown Work. The initial actions are similar to those for fault
finding i.e. make the plant safe and find the cause of the breakdown. These do
not require a Permit.
Once the plant is in a safe state, the correct type of document for the repair will
be agreed between the Responsible Supervisor and the Area Authority and a
Permit issued.
3.
15.8
Multi Discipline work. If one trade is required to support another, the work can
be done on the same Permit, provided that the Permit Applicant and Permit
Holder have been licensed to cover multi-discipline work.
Government Gas Operations
15.8.1 Work Inside Government Gas Terminals and Block Valve Areas
1.
Changeout of Relief valves. This requires the relief valve to be isolated,
removed and blanks fitted to the exposed flanges. Refer to 15.6.4. A Class B
Permit is required (Activity 6.2) The Isolation can be documented using Box 7 of
the Permit.
2.
Use of vehicle mounted cranes and hydraulic power plants. All Government
Gas vehicles are fitted with flame arresters. A Gas Test is to be done before
the vehicle enters the terminal. A Permit is not required for the vehicle, provided
that the work to be done is controlled by an approved Permit or procedure.
3.
Use of vehicle mounted crane to change out block valves. No Permit is required
to control the potential ignition source of the vehicle, but a Class B Activity 6.2
with Isolation Certificate will be required to change the block valve.
4.
Cleaning in line gas filters and routine minor maintenance work (e.g. opening
instrument junction boxes in non hazardous areas for calibration, or greasing
and checking ball valves for leakage by opening body vents.). A Class B Permit
(Activity 6.7) is to be raised, with Isolations recorded in Box 7 of the Permit.
The isolations are to be secured and tagged as required by 7.7.
5.
Entry into switchboard and battery rooms to reset the terminal alarm after a trip.
An operator may do this work without a Permit, provided he is qualified as
Appointed Electrical Person.
6.
Control Valve overhauls - Multi Task Permits. For Control Valve overhauls, all 3
disciplines are involved. A single Class B Permit (Activity 6.2) can be used,
provided that a Permit Holder licensed for multi-discipline work is available.
The Permit Holder does not need to be as competent in the other disciplines as
he is in his own, but he must be able to check that all the requirements of the
Job HSE Plan are being complied with.
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15.8.2 Work on Gas Pipeline and Right of Way Areas
1.
Work on the Right of Way between 10m and 25m of the pipeline. A Right of
Way Certificate is required, but no Permit is required for this work. A No
Objection Certificate (NOC) is required to give formal authorisation to
contractors not working for PDO.
2.
Work within 10m of the gas pipeline whether or not it touches the line. A Class
A or B Permit is required, as required by 3.6. The location of work is a
hydrocarbon area. The work is to be authorised by GGO/1 signing as Other
Affected Custodian where required.
3.
Hand excavation. Excavation to depths less than 300 mm does not require a
Permit. A Right of Way Certificate is required.
4.
Work within 15m of the pipeline that does not involve any of the activities that
require a Permit - e.g. Visual Inspections. No Permit is required.
15.8.3 Telephone Re-Validation of Permits
Telephone Re-validation is NOT allowed. If the Hazards involved in the work are
sufficient that a Permit is required, then the full requirements of the PTW System must
apply.
15.9
Electrical Safety Rules and PTW Interfaces
15.9.1 Electrical Safety Documents
There are five Electrical Safety Documents:
1.
Electrical Permit to Work - For HV work or LV with Circuit Main Earth (CME)
2.
Sanction for Test - For HV work
3.
Limitation of Access - For HV and LV work
4.
Electrical Isolation / De-Isolation Certificate - For HV and LV work
5.
Electrical Immobilisation Certificate - LV isolation for non Electrical work
Any work that requires an Electrical Safety Document (ESD) has the Electrical Hazards
adequately covered by the ESD, but it requires a Class A or B Permit (depending on the
nature of the work) when there is an interface with other work/operations. The Permit
ensures consideration of additional Hazards due to that interface.
15.9.2
Types of Electrical Work
Work in Electrical Areas of a Production Asset
This includes work in sub-stations, switchyards etc. located in Production assets. The
work is to be Authorised by the Area Electrical Supervisor (licensed as a Responsible
Supervisor), agreed by the Production Responsible Supervisor as Other Affected
Custodian and Validated by the Electrical Area Authority.
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Electrical Work on Electrical Assets controlled by Power Systems Operations
Authorised by the Infrastructure Electrical Supervisor (licensed as a Responsible
Supervisor), no other Affected Custodian, Validated by Electrical Area Authority.
Non Electrical Work on Electrical Assets controlled by Power Systems
Operations
Authorised by the Infrastructure Electrical Supervisor (licensed as a Responsible
Supervisor), no other Affected Custodian, Validated by Electrical Area Authority where
possible, or by a Production Area Authority who is an Electrically Appointed person.
15.9.3 Work at Remote Electrical Assets Controlled by Power Systems Operations
Electrical work will have a suitably qualified electrical person in the work party, to
validate the Permit.
Non-Electrical work - e.g. work on gas turbine prime mover, is covered by 15.9.2 above,
except that if circumstances prevent the PDO Electrical Area Authority from Validating
the Permit, a suitably qualified Production Area Authority from the local area could be
used. This will require agreement from the Asset Teams, and a short familiarisation
briefing for the Area Authorities.
15.9.4 Live Line Washing
This normally requires only a Limitation of Access (LOA). However, if the live lines pass
through a Hazardous Zone (1 or 2), a Class B Permit will be required.
The Electrical Supervisor shall ensure that the Auto-Reclose facility is disabled.
15.9.5 Electrical Isolation (Low Voltage)
Controls for this work are covered in the Electrical Safety rules. An Electrical Isolation /
De-isolation certificate is to be issued by a responsible member of the Custodian
department to a third party who is to carry out non-electrical work on apparatus which
needs to be isolated before work commences.
15.10 Permits to Work for ESP Activities
This section of the PTW manual defines the requirements for the use of Permits to
Work on ESP, ESPCP & PCP Activities. The section defines a standard approach
across PDO on requirements for Vendor’s application of PTW system.
15.10.1 Pre-Requisites for ESP Activities
The following shall be in place:
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
Contract Holder (CH) shall ensure the competency of Vendor Engineers,
including assurance that Vendor Engineer holds all necessary certificates.

CSR shall ensure that all defined controls in HEMP exercise and all identified
controls in Job HSE plans are established and in place.

CH shall establish and ensure that every activity has a procedure on how to
execute the activity safely.

CSR together with Production Coordinator and ESP, ESPCP & PCP vendor
shall establish Job HSE Plans specific for every activity of ESP, ESPCP & PCP
in their respective areas. The Online Job HSE Plan system should be used as
baseline.

The established Job HSE Plans shall be made available to CSR, Production
Coordinator/Supervisor and Vendor.

The steps below shall be followed for all activities that require a Job HSE Plan:
1.
Responsible Supervisor requests CSR to attend job.
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2.
CSR instructs Vendor Engineer to carry out the job. The means of
communication could be by e.g. GSM, radio, etc. appropriate for
hazardous area. CSR instructs Vendor Engineer to refer to Job HSE
Plan relevant to the activity and verify that all controls are in place.
Vendor Engineer informs CCR when the job is started and completed.
CCR Operator logs the work details in the “Station Log Book” including
the start and completion time and reports the status to the Responsible
Supervisor.
Vendor Engineer submits Job HSE Plans for all completed jobs to CSR
for documentation and assurance on return to base.
3.
4.
5.
15.10.2 Permit Requirements for ESP Activities
*Activities
system:
requiring
Commissioning
ESPCP & PCP
of
PTW
Activities requiring only Job
HSE plan:
Activities
Permit:
ESP,
Working on ESP, ESPCP &
PCP panel/Troubleshooting
Data
Collection
including
download data from ESP by
using DH sensor
Program software (adjustment
to controller) if controller is
inside the ESP Panel
Program software (adjustment
to controller) if controller is
outside ESP Panel
Replacing pigtail at Wellhead
(Isolated)
Assist to restart ESP, ESPCP
& PCP after STN S/D. (In this
case if vendor engineer is in
remote area “Access Permit”
can be obtained by any
means of communication and
sign off the “Access Permit”
form
on
return
for
documentation
and
assurance)
Fluid Shot
ESP
etc
Generator
powered
by
Visual
Panel
requiring
Inspection
Access
of
ESP
*(Note: The Electrical Supervisor to sign as affected custodian with direct liaising with
ESP-CSR and the Production supervisor to sign as Responsible Supervisor).
15.11 Permits To Work On Drilling Rigs
This Section of the PTW Manual defines the requirements for the use of Permits to
Work on Drilling Rigs operating under contract to PDO.
15.11.1 PTW Systems on Contractor Operated Drilling Rigs
A Drilling Contractor may operate his own PTW System, if it has been formally
approved by PDO. Before approval, the Contractor’s system should be examined by
PDO to ensure it complies with the checklist contained in 15.11.5.
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If a Contractor cannot meet the required standard, the PDO PTW System is to be
operated on the Rig. In this case, the requirements of this manual, except for Section 9
(Work Tracking), shall apply. The PDO Drilling Supervisor is to act as the Responsible
Supervisor and the Toolpusher as the Area Authority. If the PDO PTW System is being
used, the list of activities requiring Permit in 15.11.2 below is to apply in addition to
relevant activities from 3.6 of the PDO PTW Manual.
15.11.2 Activities requiring Permits on Contractor Operated Drilling Rigs
The activities listed require a Permit to Work on all drilling rigs working for PDO.
Maintenance

Hot Work, except when done in the approved rig workshop.

Isolation of rig safety systems.

Work in those confined spaces where there is a risk from toxic fumes or oxygen
depletion.

Major maintenance on mud pump.

Non-routine maintenance in mast during normal operations.

Maintenance / repair / painting from a personnel basket during any operations.

Man-riding hoist operations.

Scaffold erection on Rig or Camp site.

Working on equipment which requires electrical isolation.

Working on equipment which requires a secure mechanical isolation to
minimise the potential hazard.

Re-charging of Nitrogen Unit Bottles.

Inspection of mast / standpipe / derrick / substructure fixtures and fittings during
normal operations.

Killing well / major work on Xmas Tree while Rig rigging up / down.

Grit blasting.

Pressure cleaning of tubulars by subcontractor.
Pressure Testing

Cement Unit pressure testing other than cement unit related Rig work.

Any pressure tests not part of current rig work (e.g. Pre-test of BOP / test
manifold / choke manifold.)

Flowline pressure testing.

Installation of secondary Contractor’s equipment e.g. Solids control equipment,
filters or mixing machinery.
15.11.3 Activities Requiring Signature from PDO Drilling Supervisor when Contractor
PTW System is being Used.
When the Contractor’s PTW System is being used, the following activities require the
Permit to be counter-signed by the PDO Drilling Supervisor:
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
Hot Work, except when done in the approved rig workshop.

Isolation of rig safety systems.
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When required to counter-sign a Contractors Permit, the PDO Drilling Supervisor takes
responsibility for:

Agreeing that the work should be done on the equipment involved at the
proposed time.

Ensuring that all hazards have been identified.

Reviewing the Job HSE Plan to ensure that it is correct for the work.

Deciding on necessary worksite preparations and safety precautions.
The Toolpusher has all other responsibilities listed in the Contractor’s PTW System.
15.11.4 Work Done on or Near Drilling Rigs by Departments other than Drilling
Some work on the drilling location will be performed by or for departments other than
Drilling, e.g. welding and testing flowlines, digging pits etc. This work is to be covered
by a PDO Permit to Work. The requirements are as follows:
Work On the Drilling Location

The Permit is to be raised by the appropriate Permit Applicant for the personnel
carrying out the work.

The Permit is to be Authorised and Validated by the PDO Drilling Supervisor,
who will act as both the Responsible Supervisor and the Area Authority.

The Permit need not be entered into a Work Tracking System (see Section 9)
Work Near the Drilling Location
Where the work is done outside the drilling location, but within 100 metres of the well,
the following shall apply:

The Permit is to be raised by the appropriate Permit Applicant for the personnel
carrying out the work.

The Permit is to be Authorised by a Responsible Supervisor, and Validated by
an Area Authority, from the PDO Asset Holder department for the area.

The Drilling Supervisor is to sign the Permit as the Other Affected Custodian.

The Permit is to be entered in the PDO Work Tracking System (see Section 9
of the PTW Manual).
15.11.5 Checklist for Contractor Permit to Work Systems
This Checklist contains a list of questions against which a Contractor's Permit to Work
System should be checked before authorising it for use.
If the answer to any of these questions is 'No', the Contractor should be required to
amend his system.
PTW System

Is there a procedure defining how the PTW System operates?

Is there a list of work requiring Permit, which complies with the list in 3.6 of the
PTW Manual?

Does the PTW system apply to the Company and all its sub-contractors?
PTW Procedure
Page 106

Does the procedure define who authorises Permits?

Are personnel prevented from authorising themselves to work?

Are records of all Authorised and Suspended Permits kept on the Rig site?
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
Is a copy of the Permit displayed at the worksite?

Is the Person to whom the Permit is Issued named on the Permit?

Are hazards and precautions listed on the Permit or Job HSE Plan?

Does the Permit require clear definition of the work to be done?

Does the Permit state the specific location of the work?

Are Permits signed by the person to whom they are issued?

Is there a defined Validity period for a Permit?

Does the procedure include checks to prevent conflicting activities from being
authorised?

Is there a procedure for handover when the person in charge of the work
changes?

Are there documented isolation procedures?

Does the procedure state what must be done when an unsafe condition occurs
or an alarm sounds?

Is there a signature to confirm that work is complete, and that the worksite has
been left safe?
Training in PTW
Page 107

Are personnel trained in the operation of the system, to the standards required
by the E&P Forum Guidelines on Permit to Work Systems?

Are personnel who authorise Permits themselves authorised?

Is the competence of authorising personnel assessed?

Is there a record of training and assessment?

Are subcontractors included in the training requirement?
PR-1172 – Permit to Work System
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This Page is Intentionally Blank
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Appendix 1 – Class A Permit to Work
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Appendix 2 – Class B Permit to Work
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Appendix 3 - Mechanical Isolation Certificate & De-Isolation for
Test Record Sheet
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Appendix 4 – Confined Space Entry, Additional Gas Test
Record, Record of Personnel Entry and Exit
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Appendix 5 – Access Authorisation Form
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Appendix 6 - Excavation Certificate
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Appendix 7 – Radiography Certificate
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Appendix 8 – Clearance Certificate for Work in the Vicinity or
Passage Under O/H Lines
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Appendix 9 - Definitions and Abbreviations
AGT
Authorised Gas Tester
ALARP
As Low As Reasonably Practicable
CCR
Central Control Room
CSR
Company Site Representative
DTL
Delivery Team Leader
EPI
Extended Period Isolation
ESD
Emergency Shutdown
ESOP
Electrical Safety Operating Procedures
ESP
Electric Submersible Pump
ESPCP
Electric Submersible Pump Control Panel
ESR
Electrical Safety Rule
F&G
Fire and Gas
GPS
Global Positioning System
HEMP
Hazard and Effects Management Process
HSE
Health Safety and Environment
HV
High Voltage
JSP
Job Safety Plan
LOA
Limitation of Access
LV
Low Voltage
NDT
Non Destructive testing
NOC
No Objection Certificate
NORM
Naturally Occurring Radioactive Material
PCP
Pump Control Panel
PTW
Permit to Work
QA
Quality Assurance
QC
Quality Control
ROW
Right of Way
SAP-PM
Systems Applications and Processes – Planned Maintenance Module
SBM
Single Buoy Mooring
SFT
Sanction for Test
TRIC
Toolbox talk Risk Identification Card
UV
Ultra Violet
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