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Simulated workplace
Scenario · Field Construction

Pressure test and commission a new polyethylene main

You are the Crew Leader for the Riverlea Stage 3 construction crew.

Intermediate3 to 4 hours7 tasks
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The situation

What has happened

Your crew has laid 640 metres of 125 millimetre polyethylene main through Stage 3 of the Riverlea Estate in North Geelong under work order WO-26-3301. Forty-one butt fusion joints are logged. The main ties into the existing medium pressure network at two points and the developer wants gas available to the first homes by the end of the month. The pressure test is booked for tomorrow and Priya Venkatesan will not close the work order until the test record and the as laid drawing are attached. Commissioning requires a permit, control centre notification and a gas recovery unit. A sediment control failure on this site last week is still fresh in everyone's mind.

Your brief. Prepare the crew and the paperwork for the pressure test and commissioning: complete the job safety analysis, apply for the permit, record the test, purge and commission under the procedure, and close out the work order with the records the Construction Manager requires.
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Tasks

Deliverables

  • Completed job safety analysis
  • Permit to work application and closed permit record
  • Work order with test record and as laid reference
  • Asset register entries for the new valves

Documents to use

Systems to use

Field Work Orders

Tracks construction, maintenance and metering jobs from creation and scheduling through to completion, as laid drawings and close out.

Permit to Work Register

Records every permit issued for work on live gas assets, from application through isolation and restoration to close out.

Network Asset Register

The register of regulator stations, city gates, valves, cathodic protection units and other network facilities with their condition and last inspection.

For trainers and assessors

Units of competency

Current on training.gov.au for the Gas Industry Training Package as at 10 September 2026.

UEGNSG012Construct and lay plastic gas distribution mains
UEGNSG205Commission or decommission gas distribution pipelines
UEGNSG048Conduct butt fusion of large diameter polyethylene gas pipeline systems
UEGNSG229Prepare simple drawings of as laid gas mains and services
UEGNSG002Apply environmental policies and procedures in the gas supply industry

Qualifications

UEG30122Certificate III in Gas Supply Industry Operations
Assessor notes

What to look for

Evidence guide

Evidence must show the test recorded with a calibrated gauge identifier and duration, a permit that names isolation points and confirms control centre notification, a purge description that ends at full gas confirmed by detector, and environmental controls carried into the job safety analysis. The work order must not be closed before the as laid reference is recorded.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.