9579 Carry out Cathodic Protection System Troubleshooting Survey in the Gas Transmission

Guidance Information

1Performance of the elements of this unit standard must comply with relevant site requirements, and the following legislation and standards:

Health and Safety at Work Act 2015;

Resource Management Act 1991;

AS 2832.2-2003, Cathodic protection of metals Part 2: Compact buried structures;

BS EN 13636:2004, Cathodic protection of buried metallic tanks and related piping;

BS EN 15112:2006, External cathodic protection of well casing;

NACE TM 0169:2012Laboratory Immersion Corrosion Testing of Metals.

2Any new, amended or replacement Acts, regulations, standards, codes of practice,guidelines, or authority requirements or conditions affecting this unit standard willtake precedence for assessment purposes, pending review of this unit standard.

3References

Australian standards (AS) may be found at

British standards (BS) may be found at

National Association of Corrosion Engineers standards (NACE) may be found at

4Definition

Company procedures refer to the documented methods for performing work activities and include health and safety, environmental, quality management, and site requirements. They may refer to manuals, codes of practice, or policy statements.

Outcomes and performance criteria

Outcome 1

Demonstrate knowledge of cathodic protection system troubleshooting equipment used in the gas transmission industry.

Performance criteria

1.1Cathodic protection system troubleshooting equipment is described in accordance with manufacturer’s instructions.

1.2Site cathodic protection system troubleshooting equipment is located, and its use is explained in accordance with manufacturer’s instructions.

Rangeflange isolation tester, direct current voltage gradient meters, half-cells, data logger, cathodic protection system interrupter, pipe locater, multi-meter, current measuring swain clamp.

1.3Cathodic protection system troubleshooting equipment functions are explained to identify the type of information relayed in accordance with company procedures.

Outcome 2

Use cathodic protection system troubleshooting equipment in the gas transmission industry.

Performance criteria

2.1Safety procedures relating to troubleshooting, and system interruption and isolation, are used in accordance with company procedures.

2.2Conditions are assessed to determine the need to use cathodic protection system troubleshooting equipment.

Rangeflange isolation tester, direct current voltage gradient meters, half-cells, data logger, cathodic protection system interrupter, pipe locater, multi-meter, current measuring swain clamp.

2.3Fault conditions and types are identified to determine equipment requirements.

Rangeelectrical isolation problems, coating problems, broken wire, cathodic protection system interruptions.

2.4Methods of cathodic protection system interruption and isolation are used in accordance with company procedures.

2.5Cathodic protection system troubleshooting equipment is selected in accordance with company procedures and job requirements.

2.6Cathodic protection system troubleshooting equipment is operated in accordance with company procedures and manufacturer's instructions.

2.7Potential hazards of incorrect application and operation of equipment and systems are explained in accordance with manufacturer's instructions and company procedures.

Outcome 3

Locate and use documentation and reporting criteria for a cathodic protection troubleshooting survey in the gas transmission industry.

Performance criteria

3.1Specified documentation related to the operation of cathodic protection system troubleshooting equipment is located, and is used in accordance with company procedures and manufacturer's instructions.

Rangetest certificates, certification, standards for safety, standards for in service safety inspection and testing of equipment, identification tags, labels.

3.2General site equipment documentation and information are located, and are used in accordance with company procedures.

3.3International cathodic protection standards and reporting criteria are used in accordance with company procedures.

RangeBritish standards, Australian standards, North American corrosion engineer standards.

Outcome 4

Report the results of the cathodic protection troubleshooting survey in the gas transmission industry.

Performance criteria

4.1Corrections to primary data of the cathodic protection troubleshooting survey are made in accordance with company procedures.

4.2Results of the cathodic protection troubleshooting survey are calculated from primary data in accordance with company procedures.

4.3Deviations from the expected range of results are investigated and actions are taken in accordance with company procedures.

4.4The report includes all information gathered in the cathodic protection troubleshooting survey in accordance with company procedures.

4.5Outcomes of the analysis are reported and conclusions are drawn in accordance with international cathodic protection standards and reporting criteria.

RangeBritish standards, Australian standards, North American corrosion engineer standards.

Status information and last date for assessment for superseded versions

This CMR can be accessed at

Comments on this unit standard

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