19559 version 2
Page 1 of 5
Perform maintenance on an advanced gas pressure reducing and
metering station
Level
4
Credits
25
Purpose
People credited with this unit standard are able to: locate and identify
equipment, documentation, and procedures for maintenance on an advanced
gas pressure reducing and metering station; prepare site for maintenance of
an advanced pressure reducing and metering station; perform maintenance
on an advanced gas pressure reducing and metering station; recommission
and test an advanced gas pressure reducing and metering station; reinstate
site; and complete reporting and documentation.
Subfield
Gas Industry
Domain
Gas Network Operations
Status
Registered
Status date
20 November 2006
Date version published
20 November 2006
Planned review date
31 December 2011
Entry information
Prerequisites: Unit 19556, Assemble, install, test, and
commission an advanced gas pressure reducing and
metering station, and Unit 19557, Perform maintenance
on a standard gas pressure reducing and metering
station; or demonstrate equivalent knowledge and skills.
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 not limited to, workplace assessment. The
range statements relate to enterprise specific equipment, procedures, and
processes.
 New Zealand Qualifications Authority 2016
19559 version 2
Page 2 of 5
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/;
NZS 5259:2004 Gas measurement 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).
4
Definitions
Advanced gas pressure reducing and metering stations include pilot operated
regulators, and active monitor and automatic stream selection configurations.
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.
Elements and performance criteria
Element 1
Locate and identify equipment, documentation, and procedures for maintenance on an
advanced gas pressure reducing and metering station.
Performance criteria
1.1
Company procedures for the maintenance of advanced pressure reducing
stations, regulators, meters, and ancillary equipment are located and interpreted
in relation to specified job requirements.
1.2
Job instructions are confirmed in accordance with company procedures.
Range
may include but is not limited to – location, condition, size,
position, pressure settings, liaison, authorisation, manufacturer’s
information, equipment operating manuals, station operating
manuals.
1.3
Potential environmental and safety hazards are identified in accordance with
company procedures.
1.4
Equipment, components, and materials for maintenance are identified and
described in terms of type and function.
Range
1.5
includes but is not limited to – leak detection, test equipment,
spare parts, lubrication.
Equipment is described in terms of potential hazards of incorrect application
and operation and the steps to avoid them are described in accordance with
company procedures.
 New Zealand Qualifications Authority 2016
19559 version 2
Page 3 of 5
1.6
Resource requirements are identified and sourced in accordance with company
procedures.
Range
plant, tools, materials, documentation, system components,
personnel, communication equipment.
Element 2
Prepare site for maintenance of an advanced pressure reducing and metering station.
Performance criteria
2.1
Safety hazards are identified, and isolated, removed, or minimised in
accordance with company procedures.
Range
2.2
may include – signage, barriers, personal protective equipment,
safe access and egress, gas escape, fire, explosion, asphyxiation,
other utilities, temporary traffic control, environmental protection,
excavations.
Maintenance equipment and materials are prepared, handled and positioned in
accordance with company procedures and manufacturer’s instructions.
Element 3
Perform maintenance on an advanced gas pressure reducing and metering station.
Performance criteria
3.1
Maintenance of pressure reducing station regulators, meters, and ancillary
equipment complies with manufacturer's requirements and company
procedures.
Range
may include but is not limited to – site specific, liaison, lubrication,
calibration, functional tests, diagnosis, structure, corrosion, relief
valve setting, filters, pressure differential, slam shuts, temperature.
3.2
Maintenance equipment is used in accordance with company procedures and
manufacturer's instructions.
3.3
Components and component parts are maintained and/or adjusted in
accordance with manufacturer's specifications and instructions.
3.4
Maintenance complies with company safety procedures.
 New Zealand Qualifications Authority 2016
19559 version 2
Page 4 of 5
Element 4
Recommission and test an advanced gas pressure reducing and metering station.
Performance criteria
4.1
Advanced gas pressure reducing and metering station is purged and
recommissioned in accordance with company procedures, manufacturer’s
instructions and site requirements.
Range
4.2
includes but is not limited to – additional streams, relief valves,
regulators (including pilot operated), meters, liaison, location,
pressure settings.
Advanced gas pressure reducing and metering station is tested for soundness
and integrity in accordance with company procedures and manufacturer's
instructions.
Range
may include but is not limited to – pressure settings, soap test,
gauges, filters, reliefs, flow, temperature gauges.
Element 5
Reinstate site.
Performance criteria
5.1
Equipment and materials left temporarily on site are stored safely and securely,
or arrangements are made for their collection in accordance with company
procedures.
5.2
Tools, equipment, and materials are removed from site in accordance with job
requirements and company procedures.
5.3
Worksite is reinstated and made safe in accordance with company procedures.
Element 6
Complete reporting and documentation.
Performance criteria
6.1
Information is communicated to other parties, both internal and external, in
accordance with company procedures.
Range
6.2
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.
 New Zealand Qualifications Authority 2016
19559 version 2
Page 5 of 5
Please note
Providers must be accredited by the Qualifications Authority, 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 the Qualifications Authority 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