Alinta chief executive officer Bob Browning said the company would reconsider its position if the sale process changed.

There is expected to be between two and five serious contenders for the $2 billion asset. Currently pipeline specialist Australian Pipeline Trust is leading the herd while a consortium of the line's major users, which had included Alinta, Wesfarmers and Alcoa, along with the Macquarie Bank, had also shown its hand.

With the pipeline already running at capacity the major shippers through the line, Alinta, Wesfarmers and Alcoa, also have a strong financial interest in any possible expansion of the line before Western Power or any interstate entity moves into the expanding WA gas market.

However, the ACCC has previously hinted that any ownership of the pipeline by Alinta would be need to be reviewed due to concerns of monopolisation of the WA market.

Epic's decision to sell its Australian assets comes after receiving a six month extension from its 28 lenders, which are collectively owed $1.85 billion, to be finalised in a single repayment.