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Title / Demonstrate knowledge of standard gas pressure control equipment
Level / 3 / Credits / 8
Purpose / People credited with this unit standard are able to demonstrate knowledge of the types, principles, design, construction, and application of standard gas pressure control equipment.
Classification / Gas Industry > GasNetwork Operations
Available grade / Achieved
Explanatory notes
1This unit standard is intended for, but is not limited to, workplace assessment. The range statements relate to enterprise specific equipment, procedures, and processes.
2The current version of the following documents must be complied with:
Gas Act 1992;
Health and Safety in Employment Act 1992;
Gas Regulations 1993
NZS 5258:2003 Gas distribution networks available at
NZS 5259:2004 Gas measurement available at
3All work practices must comply with regulations and codes of practice pertaining to the gas industry.
4Definitions
Company proceduresmeans 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. Standard gas pressure control equipment excludes pilot-operated regulators, and active monitor and automatic stream selection configurations.
Opso means over-pressure shut-off.
Upso means under-pressure shut-off.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of the types and principles of standard gas pressure control equipment.
Evidence requirements
1.1The three basic elements of a regulator are identified and described in terms of their function.
1.2Components of gas regulators are defined in accordance with gas industry terminology.
Rangespring, valve, valve seat, diaphragm, valve stem/spindle, internal relief, breather, orifice, pilot, weight.
1.3Standard gas pressure control equipment and symbols are identified and described in accordance with gas industry terminology.
Rangeregulators, slam shut, upso valve, opso valve, relief valve.
1.4Standard gas pressure control equipment types are identified and their features described in terms of gas industry application.
1.5Standard gas pressure control equipment is described in terms of principles of operation and application.
Rangeinternal relief, separate relief, regulators, upso valve, opso valve, slam shut, stage control.
1.6Methods of identifying, handling, transporting, and storing, gas regulators and relief valves are described in accordance with company procedures and manufacturer's requirements.
Rangebadge plate, dust caps, packaging, sealing wire.
Outcome 2
Demonstrate knowledge of the design, construction, and application of standard gas pressure control equipment.
Evidence requirements
2.1Functions of each component of standard gas pressure control equipment are described in accordance with manufacturer’s specifications.
Rangediaphragm, seat, spring, orifice, vent.
2.2Application of standard gas pressure control equipment is described in terms of system requirements.
Rangepressure, flow, control systems, location, configuration.
2.3Design and construction features of standard gas pressure control equipment are described in accordance with system requirements and manufacturer's specifications.
Rangematerials, pressure, flow, location, droop, speed of response.
2.4Typical regulator configurations are described in terms of industry usage.
Rangemay include but is not limited to sketches.
Replacement information / This unit standard replaced unit standard 12522 and unit standard 19553.This unit standard, unit standard 12450 and unit standard 23084were replaced by unit standard 30381.
This unit standard is expiring. Assessment against the unit standard must take place by the last date for assessments set out below.
Status information and last date for assessment for superseded versions
Process / Version / Date / Last Date for AssessmentRegistration / 1 / 20 November 2006 / 31 December 2020
Review / 2 / 17 August 2017 / 31 December 2020
Consent and Moderation Requirements (CMR) reference / 0014
This CMR can be accessed at
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR 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.
MITO New Zealand IncorporatedSSB Code 101542 / New Zealand Qualifications Authority 2018