CTCI/Saipem Reaches Milestone of Raising LNG Tank Roof in Thailand's Largest Liquefied Natural Gas (LNG) Receiving Terminal

February 2021

CTCI is pleased to announce that the PTTLNG Nong Fab LNG Terminal project in Thailand, which it contracted jointly with Saipem, has recently completed the tank roof raising for two gigantic liquefied natural gas (LNG) tanks on Jan. 23 and Feb. 6, 2021, respectively. The tank roof raising marks a major milestone of the LNG storage tank construction in this project. By accomplishing this task, CTCI gained further experience and established track record in the global LNG engineering business field, proving its technical capabilities. 

 Located in the industrial zone of Rayong Province, Thailand, Nong Fab is the second LNG receiving terminal invested and constructed locally by PTTLNG Company Limited, a subsidiary of PTT Group, Thailand's leading energy firm. 

Kicked off on July 1, 2018, the project includes engineering, procurement, construction and commissioning of two 250,000m3 LNG storage tanks (the largest capacity per single LNG storage tank in Thailand), a gasification facility of 7.5 million tons of LNG per year, a 6-kilometer trestle unloading facility (the world’s longest trestle in the LNG field), and an eco-friendly administrative building. 

 “Air raising” technique was used to lift the LNG storage tank roofs. Air was injected into the closed space formed by the dome-shaped tank roof and the pre-stressed concrete (PC) outer wall to create additional air pressure between the interior and exterior of the roof, so as to lift it from the ground to the design elevation. 

It had been a huge challenge to raise the tank roof with a diameter of 90 meters and weighing more than 1,000 tons to a height of 48 meters (about 16 floors). To avoid the collision of tank roof structure with the PC outer wall, the position tolerance and tank roof leveling must be strictly controlled (only a few centimeters are allowed). Thanks to the rich experience, solid technology and collaboration of the project team, this arduous task was successfully completed. 

 The successful raising of LNG tank roof allowed the project to enter the next stage of implementation. By the time the terminal is commissioned and started-up in 2022, the LNG receiving terminal is able to provide 7.5 million tons of LNG regasification each year, ensuring stable energy supply for Thailand.

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