PTFE PFA lined  Steel manifold pipes are suitable for strong corrosive gases and liquids at high temperatures. Other types of steel-plastic composite pipes and metal pipes are not suitable for conveying media. Steel PTFE composite pipes are suitable. In addition, the steel polyvinylidene fluoride composite pipe is suitable for transporting corrosive media with working temperature of -40℃~+150℃.

Brief Introduction of Processing Technology of Steel Lined PTFE Pipe

Steel-lined tetrafluorotube sodium naphthalene solution treatment bonding method

Polytetrafluoroethylene (PTFE)-sodium naphthalene solution treatment bonding method: sodium naphthalene solution treatment of fluorine-containing materials, mainly through the chemical reaction of the corrosive liquid with the PTFE plastic, tear off part of the fluorine atoms on the surface of the material, so that it is on the surface A carbonized layer and some polar groups are left on it.

The sodium naphthalene solution treatment of fluorine-containing materials is mainly through the chemical reaction between the corrosive liquid and the PTFE plastic to tear off part of the fluorine atoms on the surface of the material, thus leaving a carbonized layer and certain polar groups on the surface. The infrared spectrum shows that polar groups such as hydroxyl, carbonyl and unsaturated bonds are introduced on the surface. These groups can increase the surface energy, reduce the contact angle, improve the wettability, and change from difficult to sticky to sticky. This is the most effective and commonly used method among all the methods currently studied. Generally, sodium naphthalene tetrahydrofuran is used as an etching solution.