3.防止外部火种导入管道内部: 这里指的是管道附近的明火的导入,同时也包括与管线相连的燃烧设备因回火,升压而使明火导入管内的现象。防止的方法通常有两种: (1)水封法:用于压力不高,燃烧设备对燃料所含水分无严格要求的场所,如乙炔管道的安全水封。 (2)火焰消除器法:该法就是 3. To prevent the introduction of external fire inside the pipe: Here refers to the introduction of open fire near the pipe, but also includes the pipeline connected to the combustion equipment due to tempering, boosting the fire into the tube phenomenon. There are usually two ways to prevent: (1) water seal method: For the pressure is not high, the combustion equipment does not require strict moisture content of the fuel in place, such as acetylene pipe safety seal. (2) flame eliminator method: the law is