The liquefaction temperature of natural gas is -162 degree , and the volume of liquefied natural gas (LNG for short) is 1/600 of the gaseous state, which places high requirements on the material of LNG storage tanks. Generally speaking, the outer tank wall is made of prestressed reinforced concrete, and the inner tank wall is required to be resistant to low temperatures, and is generally made of materials such as 9Ni steel or aluminum alloy. Among them, most of the aluminum alloys used in LNG storage tanks are 5 series 5083 aluminum plates. The reason why 5083 aluminum plates can "take on this important task" is mainly because it has the following characteristics:
5083 aluminum plate belongs to the AL-Mg series alloy, with low density, high strength, good fatigue performance and welding performance, and good resistance to marine atmospheric corrosion. The tensile strength is between 290-345Mpa and the yield strength is between 145-283Mpa. 5083 aluminum plate is used in applications that require high corrosion resistance, good weldability and medium strength, such as ships and automobiles. It can also be used in pressure vessels, refrigeration units, television towers, drilling equipment, and transportation equipment that require strict fire protection. wait.
According to data from the National Development and Reform Commission, my country's natural gas consumption continues to grow, with an average annual compound growth rate of approximately 15%. Restricted by the overall domestic natural gas reserves and mining capacity, the future domestic natural gas demand gap will mainly be filled by LNG imports. It can be seen that the demand for LNG storage tanks in the future cannot be underestimated. As a raw material for making LNG storage tanks, the "future" of 5083 aluminum plates is unlimited.