One Nation leader Pauline Hanson has weighed into the debate over the $13 billion bid by Hong Kong's CK Group for Australia's east coast gas pipeline network, saying she will campaign against it if it is approved by the Coalition.

With the Foreign Investment Review Board currently scrutinising the bid on national security and other grounds after it was approved last week as not being anti-competitive by the Australian Competition and Consumer Commission, Senator Hanson said such critical infrastructure should stay in local hands.