Carry out the annual cathodic protection survey and report

You are the Gas Network Technician assigned to the Traralgon depot integrity program.

Simulated workplaceIntermediate missionCAQA Gasline Networks

What is going on

The 150 millimetre steel high pressure main between Morwell and Moe is protected by rectifier R-09 and monitored at 22 test points. Last year's survey recorded a 120 millivolt drift at TP-14 that was noted but never investigated. A new housing estate has been built beside the main since then and a telecommunications duct was installed across the easement in July. Work order WO-26-3315 schedules the survey for 15 September. Tom Halloran wants every reading recorded against the asset, every defect raised, and a technical report he can table at the safety case review. The reference electrode and multimeter calibration certificates are in the depot store.

Tom Halloran, Maintenance and Integrity Manager
Subject: Cathodic protection survey, Morwell to Moe steel main

The annual survey on the Princes Highway steel main is scheduled for 15 September under WO-26-3315. Last year TP-14 drifted 120 millivolts and I want that looked at properly this time. Follow the cathodic protection procedure, record every reading against the asset in the register, raise work orders for anything outside criteria and compile a technical report using the template. I need the report before the safety case review at the end of the month.

Your brief

Plan and carry out the survey to the cathodic protection procedure, record and assess the readings, raise work orders for defects, and compile a technical report with clear recommendations for the Maintenance and Integrity Manager.

Work through it

You do not need to do it all. Doing a few of these will show you what the work is like. Your ticks and notes stay on this device.

Read the Procedure: Monitoring and Reporting on Cathodic Protection Systems and prepare a survey checklist covering equipment checks and the readings required at each asset.
Open WO-26-3315 in the Field Work Orders and update it to In progress with your planned sequence of test points and the rectifier check.
Record a set of readings for rectifier R-09 and at least six test points against asset CP-R09 in the Network Asset Register, including a reading outside criteria at TP-14.
Assess each reading against the protection criteria and the previous survey, and explain what the TP-14 drift and the new telecommunications duct suggest.
Raise a new work order for the TP-14 investigation with a priority and a description of the excavation and coating inspection required.
Compile the technical report using the Gas Industry Technical Report Template, with results tabled, conclusions and recommendations with owners and dates.
Close out WO-26-3315 with a completion note and a reference to the report.

My notes: what did I enjoy, and what surprised me?

What someone in this role would produce

Survey checklist
Asset register entries with readings
New work order for the TP-14 defect
Completed technical report

Printing this is a record of what you explored. It is not a certificate or a qualification.