... P.T.F.E thread seal is the thread sealing tape which is widely used in applicable strong oxidant, strong acid ... , oxygen, gas, high temperature steam and various chemical corrosive of Pipes and valves interface.3 P.T.F ... temperature between -190°C to +370°C.4 P.T.F.E tape is used in hardware, construction, ... defence, transport, medicine and other areas.5.P.T.F.E thread seal tape is an ideal material ...