What is semi-membrane tank?

A semi-membrane tank is a type of storage tank used primarily in the shipping and storage of liquefied gases, such as LNG (liquefied natural gas). It combines features of both membrane and conventional tanks, utilizing a thin membrane that is supported by a rigid structure. This design allows for efficient insulation and reduces weight while maintaining structural integrity under pressure. Semi-membrane tanks are often favored for their ability to optimize space and minimize boil-off gas losses.