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2021/09
Taiwan CTCI and KHI Consortium Completed 2nd Storage Tank Roof Air-Raising at CPC’s Third LNG Receiving Terminal
On September 30, 2021, CTCI Corporation (CTCI) and consortium partner Kawasaki Heavy Industries Company (KHI) successfully completed tank roof air-raising for the second LNG storage tank at CPC Corporation’s (CPC) third liquefied natural gas (LNG) receiving terminal following achieving air raising of the first tank– both with a capacity of 160,000 m3– this March. The two tanks will start commercial operations in March and October 2023, respectively, significantly stabilizing energy supply in Taiwan.
Located in Guanyin District, Taoyuan, this is the third LNG receiving terminal invested and constructed by CPC. The scope of work includes two 160,000 m3, above-ground full containment LNG tanks with double domed roof. After forming a complete airtight space within the domed roof and the pre-stressed concrete outer wall, air is infused to create additional air pressure inside. The air pressure difference then helps raise the roof, which is 78.2 meters in diameter and weighs more than 1,000 tons, to a height of 30 meters. To avoid collision between the tank roof structure and the PC outer wall, the position tolerance and tank roof leveling must be strictly controlled (with a tolerated margin of only a few centimeters). Thanks to the rich experience, solid technology and collaboration of the project team, this arduous task was successfully completed.
The tank roof, with a diameter of 78.2 meters and weighs more than 1,000 tons, is rising at a rate of about 13 centimeters per minute, to a height of 30 meters using a technique called "air-raising." The air pressure difference is utilized to raise the roof from the ground to the design height.
Left: The first storage tank is now under progress for inner tank shell installation. Right: The second storage tank has completed roof raising.
Management team of CPC and CTCI lead project teams to perform blessing ceremony.
