NZQA unit standard / 18415 version 3
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Title / Demonstrate knowledge of gas filtration, and gas filtration and ancillary equipment in the gas industry
Level / 4 / Credits / 3
Purpose / People credited with this unit standard are able to demonstrate knowledge of: gas filtration and gas filtration equipment in a gas network; and the processes required for maintenance of gas filtration equipment.
Classification / Gas Industry > Gas Transmission Operations
Available grade / Achieved

Guidance Information

1Evidence presented for assessment against this unit standard must be consistent with safe working practices and be in accordance with applicable manufacturer’s specifications, company procedures and legislative requirements.

2Performance of the outcomes of this unit standard must comply with the following:

Health and Safety at Work Act 2015.

3Any new, amended or replacement Acts, regulations, standards, codes of practice, guidelines, or authority requirements or conditions affecting this unit standard will take precedence for assessment purposes, pending review of this unit standard.

4Definition

Company procedures means the documented methods for performing work activities and include health and safety, operational, environmental, and quality management requirements. They may refer to legislation, regulations, guidelines, standard operating procedures, manuals, codes of practice, or policy statements.

Outcomes and Performance criteria

Outcome 1

Demonstrate knowledge of gas filtration and gas filtration equipment in a gas network.

Rangedust filters, element filters, coalescing filters, scrubbers and filter separators, in-line instrument filters.

Performance criteria

1.1The purpose of gas filtration is described.

Rangemay include – contaminants, oil, pipe-scale, construction debris, customer requirements, protection of downstream equipment, moisture.

1.2Types of gas filtration equipment are identified.

1.3The function of each component of gas filtration equipment is described.

Rangemay include – lid, body, vents or drains, elements, gaskets or seals, liquid traps.

1.4Application of gas filtration equipment is described in relation to system requirements.

Rangesystem requirements – principal of operation, product compatibility, size, ancillary equipment requirements.

Outcome 2

Demonstrate knowledge of the processes required for maintenance of gas filtration equipment.

Performance criteria

2.1Pipe-work configurations used to allow maintenance of gas filtration equipment are described.

Rangevalving, bypass or isolate, in service or standby.

2.2The indicatorsused to monitor filtrationequipment are described.

Rangeindicators may include – differential pressure devices, gauges, alarms, level indicators or transmitters, sump tanks.

Planned review date / 31 December 2022

Status information and last date for assessment for superseded versions

Process / Version / Date / Last Date for Assessment
Registration / 1 / 24 January 2002 / 31 December 2018
Review / 2 / 22 May 2009 / 31 December 2018
Review / 3 / 17 August 2017 / N/A
Consent and Moderation Requirements (CMR) reference / 0014

This CMR can be accessed at

Comments on this unit standard

Please contact the SSBMITO New Zealand you wish to suggest changes to the content of this unit standard.

MITO New Zealand Incorporated
SSB Code 101542 / New Zealand Qualifications Authority 2018