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Home> Company News> The reasons for the wide application of tetrafluoroethylene lined rubber flexible joint is as follows.
March 13, 2025

The reasons for the wide application of tetrafluoroethylene lined rubber flexible joint is as follows.

The tetrafluoroethylene-lined Rubber Expansion Joint is a Rubber Joint or an EPDM abrasion-resistant joint that is internally coated with PTFE (PolyTetraFluoroEthylene), also known as TEFLON. This coating effectively protects the rubber joint from corrosion by aggressive media such as strong acids, strong bases, or high-temperature oils. The PTFE coating adheres well to the inner wall of the pipeline, preventing detachment due to media erosion or pipeline expansion and contraction, thus ensuring that the original mechanical and physical properties of the  rubber flexible joint remain unaffected. It can still compensate for pipeline vibrations, absorb pipeline displacements, and reduce pipeline noise.

To enhance the performance of tetrafluoroethylene-lined Rubber Expansion Joints, this new type of joint can resist all chemicals except molten sodium metal and liquid fluorine. It remains unchanged even when boiled in aqua regia. It is widely used in various applications requiring resistance to acids, bases, and organic solvents. Tetrafluoroethylene-lined rubber expansion joints are commonly seen in chemical piping and have become the primary corrosion-resistant joints used in industries such as petroleum, chemicals, and textiles. They are mainly used in piping equipment exposed to strong acids, strong bases, and high temperatures, particularly in corrosive environments, including: pipelines for transporting corrosive gases, exhaust pipes, steam pipes, high-pressure oil pipes for steel rolling mills, high, medium, and low-pressure pipes in aircraft hydraulic and cold-pressure systems, linings for distillation towers, heat exchangers, reactors, towers, tanks, valves, and other chemical equipment.

Additionally, tetrafluoroethylene-lined rubber flexible rubber expansion joint exhibits excellent sealing properties, high lubrication and non-stick properties, electrical insulation, good aging resistance, and outstanding temperature resistance. They can operate normally even at temperatures ranging from +180°C to -80°C for extended periods.

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