Precautions For PTFE Pipes In Use

2020-03-23 13:48:48

Polytetrafluoroethylene (PTFE) has excellent chemical stability, can resist all strong acids, strong bases, strong oxidants, and does not react with various organic solvents. Polytetrafluoroethylene is widely used in machinery, chemical industry, aviation, electrical electronics, national defense industry, cutting-edge science and technology, medical and health, electrical insulation and other fields.

PTFE Pipes have excellent insulation performance. It is known that the friction of solid materials is low. It has good dielectric properties in all plastics and shows amazing chemical resistance. It is an excellent self-lubricating material, which is often used in food processing, electrical parts, insulators and medical components, Sealing, bearing, high temperature working environment, etc. are mainly suitable for some products with long specifications and non-standard mechanical parts. So, what problems should be paid attention to in the process of using polytetrafluoroethylene pipe? Under what circumstances can polytetrafluoroethylene pipe not be used?

During the construction of polytetrafluoroethylene pipe, firstly, the seamless steel pipe shall be cut according to the actual scale, and the steel pipe shall be welded with the welding ring. The argon arc welding technology can be used in the ring. The spatter in the welding shall be treated with a file, and the fillet weld shall be grinded into a round corner without sharp edge. Then, drill a small hole at the end of the steel pipe, and make a significant mark without blocking. This hole is used to exhaust the residual gas between the steel pipe and the PTFE pipe during heating, and to investigate whether the PTFE pipe is damaged or leaked during pressure test. Steel pipes shall be pre assembled before lining. During assembly, the joints shall be provided with asbestos pad of appropriate thickness, so as to meet the overall dimension requirements after lining. The assembled seamless steel pipe shall be sandblasted to remove the rust on the inner wall, and then the inner cavity of the pipe shall be purged with compressed air. Insert the PTFE pipe into the steel pipe.