The coefficient of linear thermal expansion of 36% Ni steel is approximately 1/10 of that of austenitic stainless steel SUS304. The membrane of LNG inground storage made of 36% Ni steel would contribute to reduce the construction cost because it is simple structure.
The following 5 subjects on 36% Ni steel have been studied to apply to the actual LNG inground storage.
(1)physical and mechanical properties
(2)welding characteristics
(3)mechanical properties of welding joint
(4)corrosion characteristics
(5)structure of 36% Ni steel membrane
According to these studies, we conclude that no technical concern will be anticipated on membrane made of 36% Ni steel.
