Steel-lined PTFE pipes, namely steel-lined PTFE pipes and fittings, have the reputation of "Plastic King". They have excellent temperature resistance and corrosion resistance. They are ideal for nitric acid, sulfuric acid, hydrofluoric acid, phosgene, Transport equipment for highly corrosive media such as chlorine, aqua regia, mixed acid, bromide and other organic solvents. The steel-lined PTFE pipelines and accessories that can operate stably under extreme negative pressure conditions at high temperatures (within 150°C) for a long time solves the shortcomings of steel-lined PTFE pipelines and accessories that cannot withstand negative pressure. In many distillations, such as high temperature and high negative pressure It has been widely used in the system.