TPEP anti-corrosion spiral steel pipe for large diameter water transmission

Manager Zhang’s anti-corrosion technology (inside and outside) of Tianyuan Anti-corrosion Steel Pipe Co., Ltd. is a combination of thermosetting epoxy resin powder coating and polyethylene properties and processing technology, and then cleverly combines the three-layer structure polyethylene coating and sintered epoxy powder coating technology to provide It provides the best solution for corrosion protection of buried steel pipes. The inner wall is sintered with epoxy resin powder (B) for anti-corrosion, which solves the problem of internal anti-corrosion of the pipeline. The pipe has small roughness, smooth inner wall and good hydraulic performance. Through the analysis of design examples, it is concluded that compared with pipes of the same diameter, the loss of pipelines with inner wall sintered epoxy coating can be reduced by more than %. When transporting the same flow rate, the pipe diameter can be reduced by one level, thereby reducing Reduce costs and reduce energy consumption. It has become a main product of large-diameter water transmission pipelines widely used in the market.
The first step of the anti-corrosion steel pipe is a single layer of epoxy powder, which fundamentally ensures the anti-corrosion effect of the anti-corrosion steel pipe. Then the next process is carried out: the adhesive three-layer structure polyethylene anti-corrosion layer combines the sintered epoxy powder The excellent properties of both coatings and extruded polyethylene anti-corrosion layers combine the interfacial properties and chemical resistance properties of sintered epoxy powder coatings with the mechanical protective properties of extruded polyethylene anti-corrosion layers, thereby significantly improving their respective performance. Therefore, it is very superior as an outer protective layer for buried pipelines. According to relevant information, three layers can extend the service life of buried pipelines to years. Currently, it is considered to be the most advanced pipeline external anti-corrosion technology in the world. In our country, three-layer systems have taken the lead in being applied in oil and gas systems. Our country's built Shaanxi-Beijing natural gas pipeline and Kushan-Shanxi oil pipeline, as well as the recent national key project West-East Gas Pipeline nearly one kilometer long, all use three layers of external anti-corrosion coating. In Tianjin, three kilometers of high-pressure pipelines from Shaanxi to Tianjin, kilometers of high-pressure natural gas pipelines on the outer ring line, and kilometers of underground gas storage pipelines on the Shaanxi-Beijing line also use three layers.
The outer and inner sintered epoxy anti-corrosion steel pipe is an upgraded product based on the outer single-layer polyethylene inner epoxy composite steel pipe. It is currently the most advanced form of steel pipe anti-corrosion for buried long-distance pipelines. It is a fourth-generation new anti-corrosion production line for large-diameter pipes independently developed by Cangzhou Tianyuan Anti-corrosion Engineering Co., Ltd. The outer wall uses a hot-fusion winding process to form a three-layer anti-corrosion layer with the bottom epoxy resin, the middle layer of adhesive, and the outer layer of polyethylene. The inner wall adopts the thermal spray epoxy powder anti-corrosion method. The powder is heated and sintered at high temperature and then evenly coated on the surface of the pipe body to form a steel-plastic alloy layer, referred to as anti-corrosion steel pipe. Ethylene refers to epoxy resin). It greatly improves the coating adhesion and coating thickness, and enhances the resistance to collision and corrosion.
Steel pipes have superior ductility, integrity and convenient construction operability. They are suitable for underground laying and can be used for overhead construction, river crossing and pipe jacking construction. Steel pipes and their accessories are shielded with anti-corrosion coatings on their inner and outer wall surfaces. This is the most convenient and commonly used means of protection. The steel-plastic composite pipe after internal and external protection is very cost-effective. It is a combination of the excellent properties of steel pipes and plastic pipes. It not only has the strength and stiffness of steel pipes, but also has the chemical corrosion resistance, no pollution, smooth inner wall, and no fouling of plastics. , small fluid resistance and other advantages, it can effectively prevent secondary pollution of water quality, and has a significant effect on improving water quality. Developed countries such as the United States and Japan have been using it for more than 10 years.