论文部分内容阅读
气焊是利用可燃气体与氧气按一定比例混合燃烧的火焰,对金属进行加热的一种熔化焊。常用可燃气体为乙炔。气割是利用可燃气体与氧气混合的预热火焰,将金属切割处加热至燃烧点,并在氧气射流中剧烈燃烧,从而割开金属。常用可燃气体为乙炔和液化石油气。危险性分析氧气是一种无色、无味的气体,比空气略重。它本身不能燃烧,但是一种活泼的助燃气体,几乎能与所有可燃的气体和液体的蒸气混合成爆炸性混合物。气焊和气割用氧纯度达99.2％,这
Gas welding is the use of combustible gas and oxygen by a certain percentage of mixed combustion of the flame, the metal is heated to a fusion welding. Commonly used combustible gas acetylene. Gas cutting is the use of a combustible gas mixed with oxygen preheated flame, the metal cutting is heated to the burning point, and violent combustion in the oxygen jet, thereby cutting the metal. Commonly used combustible gases are acetylene and liquefied petroleum gas. Risk Analysis Oxygen is a colorless, odorless gas, slightly heavier than air. It does not burn by itself, but a lively combustion-supporting gas mixes with almost all combustible gas and liquid vapors into an explosive mixture. Gas welding and gas cutting oxygen purity of 99.2%, which