External winding 3PE internal fusion bonded epoxy large diameter anticorrosive pipeline (TPEP anti-corrosion steel pipe) is a steel pipe as a substrate, the outer wall of the three-layer structure of winding polyethylene anti-corrosion, the inner wall of the hot-melt epoxy resin powder has not been preserved at high temperatures, the formation of steel-plastic alloy layer. Abbreviation TPEP anti-corrosion steel pipe. (T, the first letter of three-layer English THREE, PE refers to polyethylene, EP refers to epoxy resin).
TPEP anti-corrosion steel pipe structure:
- Inner coating of hot-melt epoxy resin: smooth inner wall, small pipe roughness, good hydraulic performance.
- Bottom layer of hot-melt epoxy resin: good chemical resistance and cathodic stripping resistance.
- Outer layer of low-pressure high-density polyethylene: resistant to bumping, mainly playing a mechanical protection role, followed by anti-corrosion role of the steel pipe layer: high mechanical strength, strong pressure-bearing capacity.
- Intermediate layer adhesive: greatly enhance the adhesion of polyethylene layer.
- Three-layer structure polyethylene anticorrosion layer (3PE) combines the excellent properties of epoxy coating and extruded polyethylene two kinds of anticorrosion layer, the interface characteristics of epoxy coating and chemical resistance, and extruded polyethylene anticorrosion layer of the mechanical protection characteristics of the advantages of the combination, so as to significantly improve the performance of their respective. Therefore, it is very superior as the outer protective layer of buried pipeline.
