Steel-lined PTFE pipes, 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, phosgene, chlorine, and aqua regia , Conveying equipment for strong corrosive media such as mixed acid, bromide and other organic solvents. Steel-lined PTFE pipes and fittings that can operate stably under extreme negative pressure conditions at high temperatures (within 150°C) for a long time solve the shortcomings that steel-lined PTFE pipes and fittings cannot withstand negative pressure in the past. It has been widely used in the system.