紧急切断阀是液化石油气汽车槽车的一种重要的安全装置,根据国家劳动总局颁发的《液化石油气汽车槽车安全管理规定》的要求,所有液化石油气汽车槽车在槽体的液相管和气相管接口处,均须装设这种装置。过去,液化石油气汽车槽车上由于没有这种安全装置,曾发生过多次重大事故,给国 Emergency shut-off valve is an important safety device for liquefied petroleum gas tank cars. According to the requirements of “Regulations for Safety Management of Liquefied Petroleum Gas Tank Cars” issued by the State Administration of Labor, all liquefied petroleum gas tank cars in the tank liquid The phase pipe and the gas pipe joints, must be equipped with this device. In the past, due to the lack of such safety devices on liquefied petroleum gas tank cars, there were many major accidents that occurred to the country