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Parmelia Gas Pipeline

The Parmelia Gas Pipeline (PGP) was Western Australia’s first transmission pipeline, completed in 1971.

100%
APA owned
413km
mainline pipeline length
1971
construction completed
WA’s first transmission pipeline

The PGP has a mix of network, retail, electricity generation, as well as oil and aluminium refinery customers in the Perth area and the south west of Western Australia.

Critical gas supply to Perth

The 416 km (mainline) Parmelia Gas Pipeline (PGP) transports gas from the Perth Basin gas fields near Dongara (south of Geraldton), and APA’s Mondarra Gas Storage Facility, to end-users in the Perth area.

Kwinana Supply Lateral

The 1.4 km Kwinana Supply Lateral, built in 2002, delivers gas to customers in the Kwinana industrial area south of Perth.

Connections to other pipelines

The PGP comprises a 416 km mainline and several laterals.

The mainline PGP interconnects with the ATCO Gas distribution network in the Perth metropolitan area.

Various other single user gas laterals also connect to the PGP, including the Westlime Lateral, Chandala Lateral, Bullsbrook (Rocla) Lateral, Canningvale Lateral and Hismelt Lateral.

History

As WA’s first transmission pipeline, it was granted Pipeline Licence #1, and was originally known as the Western Australian Natural Gas (WANG) Pipeline.

Pipeline capacity and flow

The mainline PGP has a natural gas haul capacity of 68 TJ/d. An upgrade has been made to the northern section to make it bi-directional flow.

Regulatory status

The PGP and interconnected laterals are non-scheme pipelines.

The Kwinana Supply Lateral has been granted a category 3 exemption (average throughput less than 10TJ/day) from aspects of Part 23 information disclosure.

The other laterals have been granted category 2 exemptions (single user pipelines) under Part 23 of the National Gas Rules.

Sustainability and Environmental Impact

APA’s commitment to innovation and the energy transition has seen some remarkable milestones passed, including being at the forefront of innovation in green hydrogen.

Australian first hydrogen transmission

In 2023 APA successfully completed a test with the PGP to transport 100% hydrogen along a 43 km section of the Parmelia Gas Pipeline. This research was partly funded by the WA Government’s Renewable Hydrogen Fund.

Additional information
Capacity and services

The following standard services are offered on the PGP, subject to available capacity:

  • Firm transport.
  • Interruptible transport.
  • In pipe trade.

A description of these non-reference services can be found on the gas transmission services page.

Relevant tariffs for these non-reference services can be found on the tariffs and terms page.

Non-standard services or alternative terms may be available by negotiation.

Notes on services
Firm services are available over varying terms as set out on the gas transmission services page.    

Interruptible services are only available while the pipeline is fully contracted in respect of the corresponding firm service.

APA is progressively rolling out In pipe trade service capability on all key pipelines. APA will prioritise this service rollout in accordance with shipper demand.

Policies, Procedures and Requirements

Metering and Measurement 

Metering and Measurement obligations are outlined in APA’s STGA for West Coast, and for this pipeline are set out in the Metering and Measurement Requirements. 

Credit support 

APA has minimum credit support requirements that are a pre-condition to gaining access to pipeline services.

Contact

We encourage potential customers to contact APA early when considering their gas supply and transport needs. Early discussion of needs improves the likelihood that APA can tailor services to meet them.

Formal access request

Potential customers do not have to submit a Formal Access Request to gain access to an APA pipeline. If you are interested in acquiring services for this pipeline, you can contact us at the contact details above to discuss your requirements.

For APA's non-scheme pipelines, you have a right to make a Formal Access Request pursuant to Rule 559 of the National Gas Rules. Lodging a Formal Access Request triggers a formal process of Access Offer and information exchange between APA and the potential customer.

You can make a Formal Access Request by completing in-full the relevant User Access Request Form for this pipeline and emailing it to useraccessrequest@apa.com.au.

APA Financial Information Disclosure – Part 23 National Gas Rules

APA is reporting financial information for its non-scheme pipelines — that is, pipelines that are not subject to full or light regulation, according to ERA’s Financial Reporting Guideline for non-Scheme Pipelines. The financial information for the six months to 30 June 2018 and the years ending 30 June 2019 - 2024 includes Pipeline Financial Statements based on Australian Accounting Standards, the weighted average price for services on each of these pipelines, and the number derived using the ERA recovered capital method (RCM).

Interested parties should read APA’s Basis of Preparation together with the completed financial information template that was developed by the ERA.

In addition, APA advises in relation to RCM:

  1. The assumed initial capital structure is 40% equity and 60% debt. The level of equity will increase in circumstances where there is a shortfall in annual revenue.
  2. The return on equity is a commercial return applicable in a workably competitive market. Historically, this return for an established pipeline was in the range of 9-11%, depending on factors such as risk, terms and counterparty.
  3. The cost of debt is based on a 10-year rolling average of a market rate applicable for an entity whose business is solely the ownership and operatorship of the particular pipeline.
Supplier Curtailment Methodology

Supplier Curtailment Methodology:

This Supplier Curtailment Methodology is established in accordance with Rule 101B(2)(f) of the National Gas Rules.

Conditions for Curtailment of Covered Gas Injected at Receipt Points:

For the Berwyndale Wallumbilla Pipeline, the service provider may curtail the injection of covered gas at a receipt point if it fails to conform with the gas specification requirements.

Protocol for the Curtailment of Covered Gas Injected at Receipt Points:

For a more comprehensive overview of the curtailment process, please refer to Section 10 of APA Precedent SGTA | West Coast Grid Sample, which pertains to our West Coast Grid.