Precautions For PTFE Tube During Use

2020-03-06 08:54:51

PTFE has excellent chemical stability, can withstand all strong acids, strong bases, strong oxidants, and does not interact with various organic solvents. Various profiles and parts made of PTFE rods, pipes, films, bearings, gaskets, valves, etc. are widely used in machinery, chemical industry, aviation, electrical and electronics, defense industry, cutting-edge technology, medical and health and electrical insulation And other fields.

PTFE tube has excellent insulation properties. It is known that the friction is low in solid materials, has good dielectric properties in all plastics, and shows amazing chemical resistance. It is an excellent self-lubricating material, often used in Food processing, electrical parts, insulators, medical components, seals, bearings, high-temperature working environments, etc., are mainly suitable for some products with long specifications and non-standard mechanical parts. So, what problems should be paid attention to during the use of polytetrafluoroethylene pipes, and under what circumstances can polytetrafluoroethylene pipes not be used?

During the construction of the PTFE pipe, the seamless steel pipe is first blanked according to the actual scale, and the steel pipe is welded with the welding ring. The ring can be welded by manual argon arc. Fillet welds are rounded without sharp edges. Then, drill a small hole at the end of the steel pipe, make a prominent symbol, and do not block. This hole is used to exhaust the residual gas between the steel pipe and the PTFE pipe during heating, and is used to investigate whether the PTFE pipe is damaged and leaked during the pressure test. Steel pipes should be preassembled before lining. When assembling, an asbestos padding pad of appropriate thickness should be added at the interface to meet the general size requirements after lining. The assembled seamless steel pipe is subjected to sandblasting to remove rust on the inner wall, and then the inner cavity of the pipe is purged and cleaned with compressed air. Insert the PTFE tube into the steel tube.