Allseas-Boskalis consortium bags offshore natural gas pipeline project in Taiwan

A 50-50 consortium formed by Allseas and Boskalis has been awarded a contract by CPC Corporation of Taiwan for the second offshore gas pipeline from Yongan to Tongxiao (YT2).

The total contract value is approximately €1.2 billion (US$1.4 billion).

Allseas said this energy project is intended to support the acceleration of energy transition in Taiwan and improve the gas supply capacity in the northern areas of the country.

Under the contract, the consortium will design, construct, install and pre-commission the new YT2 36-inch (910mm) offshore natural gas pipeline, which will run approximately 232 kilometres parallel to the existing YT1 pipeline, connecting the Yongan LNG terminal in the southwest with the Tongxiao transfer station in the northwest.

Allseas said the scope of work includes trenching, pipeline installation with 34 crossings over existing and future infrastructure and assets, backfilling and two landfalls.

Within the consortium, Allseas will carry out the pipeline installation and pre-commissioning, including the pre-lay installation of concrete mattresses. For these activities, Allseas will deploy two pipelay vessels.

Boskalis will be responsible for the landfalls and associated microtunnelling activities, as well as nearshore and offshore trenching, backfilling, and the installation of rocks for the 34 pipeline crossings. For these activities, Boskalis will deploy two large hopper dredgers, a large backhoe dredger, and a subsea rock installation vessel.

Project execution is scheduled to commence in 2026, with completion anticipated in 2028.