Polytetrafluoroethylene plastic has excellent corrosion resistance and heat resistance. It can withstand almost any concentration of strong acid, strong alkali, strong oxidizing medium and organic solvent, and its chemical resistance exceeds all existing plastics. So it It is an ideal lining anticorrosive material. The PTFE lined pipe is made of two parts lining a PTFE lined pipe and a steel jacket. It has good corrosion resistance and temperature resistance and is one of the ideal anti-corrosion methods. There are basically several methods for lining PTFE pipelines; they are tight lining method; loose lining method; powder metallurgy molding method.