Vacuum LNG cryogenic liquid storage tank is a commonly used and advanced long-term storage equipment for cryogenic liquids. It has the advantages of large storage capacity, adjustable pressure, low evaporation rate, safety and reliability, etc. It is widely used in LNG filling stations and LNG gasification stations. , LNG emergency peak shaving station and other projects. The storage tank adopts a double-layer cylindrical structure, and the interlayer is filled with insulation material pearl sand and evacuated. It is mainly composed of an inner tank and an outer tank, a thermal insulation structure, a piping system and safety accessories.