What are the special points about the design of large-scale LNG storage tanks?

　　Generally, LNG is stored at -162 degrees. In order to ensure large-scale LNG storage tanks, the following factors need to be considered when selecting the metal materials for manufacturing cryogenic storage tanks: the strength within the range of normal temperature to -196 degrees, and sufficient in the use temperature range Toughness and plasticity, so as not to cause brittle failure. Stable metallographic structure, good processability and weldability, low price, easy to buy.

　　In the cryogenic tank, LNG is in a boiling state, it is close to the boiling state, external heat invades into the gasification and makes the pressure super high, the valve opens or causes greater damage. The boiling point of liquefied natural gas under normal pressure is -162 degrees. Therefore, the design of large-scale LNG storage tanks requires good low-temperature resistance and excellent cold storage performance.

　　Since the storage tank contains cryogenic liquid, once an accident occurs in a large LNG storage tank, the refrigerated liquid will evaporate in a large amount and become an explosive mixture in the atmosphere. Therefore, the tank requires a double-wall structure and the use of a closed concept. When the box body leaks, the second layer box body can completely seal the leaked liquid and vaporized gas to ensure the safety of storage.

　　The seismic requirements of general buildings are that they will not rupture and collapse under the specified seismic load. In order to ensure the safety of large-scale LNG storage tanks under accidental loads, the storage tanks must have good seismic performance to prevent the tank from being under a given seismic intensity. damage.

　　Welding must be inspected by 100% magnetic powder, cold insulation materials must be strictly selected, and the specified procedures must be followed during the construction process. At present, the materials suitable for the construction of low-temperature storage tanks are mainly 9Ni steel. The inner tanks of medium and small large-scale LNG storage tanks are made of austenitic stainless steel, which are large and extra-large. Well, the introduction of LNG liquid vacuum storage tank manufacturers is here, if you have anything you don’t know, please leave a message!