Introduction to steel lined teflon tube

Firstly, imported PTFE powder is used to push (squeeze) the teflon tube, and then it is forced into seamless steel tube (liner outer diameter is slightly larger than tube inner diameter 1.5-2mm) to form a tight liner without clearance.In order to eliminate the pressure, it is put in the furnace, heated to 180℃ for constant temperature treatment, so that it can be used in the temperature below 180℃.At the same time, the axial tensile strength of push tube is better than that of wound tube.The pipeline has ideal positive and negative pressure resistance.

PTFE powder moulding method is a kind of body, such as pressure, such as isothermal manufacturing technology, through the extruded tube (loose lining, lining) of PTFE, PTFE belt winding and winding plus steel wire, and steel net within process of evolution, the PTFE lining powder compression molding technology is by far the PTFE lining the latest fifth-generation products, can be at a higher pressure, high temperature, strong corrosion under the conditions of use, the temperature below 200 ℃ and vacuum is 0.096 MPa, quenching heat or alternating operation, won't make PTFE grassroots fall off, the drum, expansion deformation of flat, thereby the fluorine steel body.

Chemical properties of steel lined teflon tube:

Air aging resistance: radiation resistance and low permeability: long-term exposure to the atmosphere, the surface and performance remain unchanged.

Non-flammability: the oxygen limit index is below 90.

Acid and alkali resistance: insoluble in strong acids, strong bases and organic solvents.

Oxidation resistance: resistant to corrosion of strong oxidants.

Steel lined teflon tube working characteristics:

Performance: working temperature of medium: -100℃~-250℃

Working pressure of medium: positive pressure: 2.5mpa, with negative pressure of 70KPa at normal temperature

Corrosion resistance: steel ptfe composite pipe, in addition to molten metal lithium, potassium, sodium, chlorine trifluoride, high temperature trifluoride oxygen, high flow rate of liquid fluorine, it can resist almost all chemical media, including concentrated nitric acid and aqua aqua corrosion, it can work for a long time in the temperature of 230℃-250℃.Steel polyvinylidene fluoride or other vinylidene fluoride composite pipe, halogen, halogenated hydrocarbon, strong oxidant, boiling acid, alkali, a variety of organic solvents have good corrosion resistance, but not resistant to smoke sulfuric acid, concentrated hot sulfuric acid and nitric acid, 90℃ above ketone, ester, amine and high temperature sulfonating agent corrosion.

Application fields of steel lined teflon pipeline:

Steel lined tetrafluoroethylene pipe is suitable for strong corrosive gas and liquid under high temperature, other types of steel plastic composite pipe and metal pipe are not suitable for conveying medium, steel ptfe composite pipe is suitable for all.In addition, steel polyvinylidene fluoride composite pipe suitable for the transport of corrosive media at the working temperature of -40℃~+150℃.