23087 version 2
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Pig a pipeline in a gas network
Level
4
Credits
4
Purpose
People credited with this unit standard are able to: locate and identify
procedures, documentation, and equipment for pigging a gas pipeline; load
and launch a pig; receive and unload a pig from a gas pipeline; and complete
reporting and documentation.
Subfield
Gas Industry
Domain
Gas Network Construction
Status
Registered
Status date
21 May 2010
Date version published
21 May 2010
Planned review date
31 December 2015
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
This unit standard is intended for, but is not limited to, workplace assessment. The
range statements relate to enterprise specific equipment, procedures, and
processes.
2
The current version of the following documents must be complied with:
Health and Safety in Employment Act 1992;
NZS 5258:2003 Gas distribution networks available at http://www.standards.co.nz/.
3
All work practices must comply with regulations and codes of practice pertaining to
the gas industry. A full list of applicable regulations and codes is available from the
NZ Motor Industry Training Organisation (Incorporated) (MITO).
 New Zealand Qualifications Authority 2016
23087 version 2
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4
Definitions
Company procedures means the documented methods for performing work activities
and include health and safety, environmental, and quality management requirements.
They may refer to manuals, codes of practice, or policy statements.
Pigs are devices for insertion into pipelines for the purpose of cleaning the lines or
separating products.
Elements and performance criteria
Element 1
Locate and identify procedures, documentation, and equipment for pigging a gas pipeline.
Performance criteria
1.1
Company procedures for pigging a gas pipeline are located and 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 pig usage are described according to site specific application.
Range
1.4
foam, displacement, gauging, batching.
Equipment is described in terms of hazards 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 – cleaning, purging, clearing
blockages.
Pig types are identified according to application and site pigging requirements.
Range
1.5
instructions include but are not limited to – site location, consents.
hazards may include but are not limited to – stuck pig, reduced
flow rates, process interruption.
Resource requirements are identified and sourced in accordance with company
procedures.
Range
plant, tools, materials, documentation, personnel, communication
equipment.
 New Zealand Qualifications Authority 2016
23087 version 2
Page 3 of 4
Element 2
Load and launch a pig.
Performance criteria
2.1
Safety and environmental hazards are identified, then isolated, removed, or
minimised, in accordance with company procedures.
Range
may include – signage, barriers, personal protective equipment,
safe access and egress, gas escape, fire, explosion, asphyxiation,
other utilities, temporary traffic control, environmental protection,
excavations.
2.2
The pig is loaded in accordance with manufacturer’s instructions and company
procedures.
2.3
Pig launching system checks are made in accordance with company
procedures.
Range
pressure, isolations, in line valves are confirmed open.
2.4
The pig is launched in accordance with manufacturer’s instructions and
company procedures.
2.5
Communication with relevant personnel is maintained during pig launching
operation in accordance with company procedures.
Element 3
Receive and unload a pig from a gas pipeline.
Performance criteria
3.1
Pig receiving system checks are made in accordance with company
procedures.
Range
may include but is not limited to – pressure, isolations, safety
equipment, pig receiver.
3.2
The pig is received in accordance with manufacturer’s instructions and
company procedures.
3.3
Pig unloading system checks are carried out in accordance with company
procedures.
Range
3.4
may include but is not limited to – pressure, isolations, catchment,
equipment, safety equipment.
The pig is unloaded in accordance with manufacturer’s and site procedures.
 New Zealand Qualifications Authority 2016
23087 version 2
Page 4 of 4
3.5
Residual materials are disposed of in accordance with consents and company
procedures.
Range
3.6
may include but is not limited to – water, shavings, debris.
Findings are noted and recorded in accordance with company procedures.
Range
condition of pig, analysis of debris, follow-up actions.
Element 4
Complete reporting and documentation.
Performance criteria
4.1
Information is communicated to other parties, both internal and external, in
accordance with company procedures.
Range
4.2
may include but is not limited to – special conditions, completion
notice, additional work.
Records and documents are completed and processed 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