18418 version 2
Page 1 of 4
Operate and maintain main line valves on a gas transmission pipeline
system
Level
4
Credits
6
Purpose
This unit standard is for people working, or intending to work, in the gas
transmission industry.
People credited with this unit standard are, on a gas transmission pipeline
system, able to: locate, identify, and interpret procedures and resource
requirements for operating and maintaining main line valves; operate and
maintain main line valves; and place main line valves back into service after
maintenance.
Subfield
Gas Industry
Domain
Gas Transmission Operations
Status
Registered
Status date
22 May 2009
Date version published
22 May 2009
Planned review date
31 December 2014
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
NZ Motor Industry Training Organisation (Incorporated)
(MITO)
Accreditation and Moderation Action Plan (AMAP) reference
0114
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Performance of the elements of this unit standard must comply with relevant site
requirements, and the following legislation and standard:
Health and Safety in Employment Act 1992;
Health and Safety in Employment (Pipelines) Regulations 1999;
Resource Management Act 1991;
NZS/AS 2885.1:1997 Pipelines – Gas and liquid petroleum – Design and
construction.
 New Zealand Qualifications Authority 2016
18418 version 2
Page 2 of 4
2
Definitions
Company procedures refer to the documented methods for performing work activities
and include health and safety, environmental, site requirements, and quality
management requirements. They may refer to manuals, codes of practice, or policy
statements.
PPE refers to personal protective equipment.
Elements and performance criteria
Element 1
Locate, identify, and interpret procedures and resource requirements for operating and
maintaining main line valves on a gas transmission pipeline system.
Performance criteria
1.1
Company procedures for operating and maintaining main line valves are
located, and are interpreted in relation to specified job requirements.
1.2
Job instructions and system specifications are confirmed in accordance with
company procedures.
Range
1.3
Reasons for having a main line valve on a gas transmission pipeline system are
explained in accordance with company procedures.
Range
1.4
may include but is not limited to – main line valve, bypass valve,
actuators, piping components, control systems, trip devices,
indication equipment, check valves.
Consequences of incorrect application and operation, and the steps to avoid
them are described in accordance with company procedures.
Range
1.6
may include but is not limited to – legislative requirements,
company requirements, line rupture protection, pipeline section
isolation.
Main line valve systems are described in terms of types and component parts.
Range
1.5
instructions and specifications may include but are not limited to –
site location, work instructions, current test certificates,
identification tags, equipment operating manuals, pipe and
instrumentation drawings, electrical schematics, isolation
procedures, plant release.
may include but is not limited to – supply interruption, personal
harm and equipment damage, environmental impact.
Resource requirements are sourced in accordance with company procedures.
Range
tools, test equipment, PPE, materials, documentation, competent
and authorised personnel, communication equipment.
 New Zealand Qualifications Authority 2016
18418 version 2
Page 3 of 4
Element 2
Operate and maintain main line valves on a gas transmission pipeline system.
Performance criteria
2.1
Potential hazards are identified, and site emergency procedures are explained
in accordance with site requirements.
Range
2.2
Normal operating parameters of main line valves are described.
Range
2.3
may include but is not limited to – flammable product, high
pressure, leaks, toxic, equipment integrity, environmental.
may include but is not limited to – normally open, normally closed,
trip set points, fail position.
Main line valves and actuator systems are operated in all control modes in
accordance with manufacturer's instructions.
Range
automatic, manual, trip mode, bypass.
2.4
A main line valve and actuator system are bypassed, isolated, and depressurised in accordance with manufacturer's instructions.
2.5
Routine maintenance is carried out on a main line valve and actuator system in
accordance with company procedures.
Range
may include but is not limited to – main line valve, bypass valve,
actuators, piping components, control systems, trip devices,
indication equipment, check valves, test equipment.
2.6
Components and component parts are repaired or replaced, fitted, and
adjusted, in accordance with manufacturer’s specifications.
2.7
Potential consequences of incorrect application and operation of equipment and
procedures are explained.
Range
may include but is not limited to – equipment damage, loss of
supply to customer, inaccurate alarms.
Element 3
Place main line valves back into service after maintenance on a gas transmission pipeline
system.
Performance criteria
3.1
Communication of the intention to place the main line valve back into service is
carried out with appropriate personnel in accordance with company procedures.
 New Zealand Qualifications Authority 2016
18418 version 2
Page 4 of 4
3.2
Main line valve and ancillary equipment are placed back into service, and tested
for integrity and correct operation, in accordance with company procedures and
manufacturer’s instructions.
3.3
Documentation related to monitoring and maintaining the main line valves is
completed and communication to all appropriate personnel is carried out in
accordance with company procedures.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the NZ Motor Industry Training Organisation (Incorporated) (MITO)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016