2025-03-07
Anticorrosion Technology and Main Category of Large Diameter Anticorrosive Spiral Pipe
Large-diameter anti-corrosion spiral pipe refers to the steel pipe that has been processed by anti-corrosion technology and can effectively prevent or slow down the corrosion of chemical or electrochemical reactions during transportation and use.
The production process of large-diameter spiral welded pipe adopts electric contact pressure gauge to control the pressure of the pressure cylinder on both sides of the conveyor to ensure the smooth transportation of the strip steel. The weld gap control device is used to ensure that the weld gap meets the welding requirements, and the pipe diameter, misalignment and weld gap are strictly controlled. Both internal welding and external welding adopt American Lincoln welding machine for single wire or double wire submerged arc welding, so as to obtain stable welding specifications. The welded welds are inspected by on-line continuous ultrasonic automatic flaw detector, which ensures 100% NDT coverage of spiral welds. If there are defects, automatic alarm and spraying marks, production workers according to this at any time to adjust the process parameters, timely elimination of defects.
The main categories of large diameter anti-corrosion spiral pipe are as follows:
1. IPN8710 anti-corrosion (mainly applicable to drinking water pipeline).
2. 2PE/3PE anti-corrosion.
3. Epoxy coal tar pitch anti-corrosion (made of epoxy resin, coal tar pitch, anti-rust pigment, additives and modified amine. The product has the characteristics of rapid drying, good adhesion, good flexibility, two-component packaging and convenient construction. It has the characteristics of acid resistance, alkali resistance, salt resistance, water resistance and oil resistance).
4. Epoxy powder anticorrosion (using electrostatic spraying process to coat epoxy powder on the surface of steel pipe, a film. The coating has the advantages of simple coating operation, no pollution, good impact resistance and bending resistance, high temperature resistance, etc.). The main implementation standard FBE epoxy powder anti-corrosion implementation SY/T0315-1997 "steel pipeline fusion bonded epoxy powder coating technical standard", 2PE/3PE anti-corrosion implementation SY/T0413-2002 (test) "buried steel pipeline polyethylene coating technical standard".
Tel / WhatsApp:
E-mail: