Application fields of large-diameter plastic-coated steel pipes

Large-diameter plastic-coated steel pipes are mainly made of spiral steel pipes or seamless steel pipes as the base material. It is not recommended to use straight-seam welded pipes. Straight-seam welded pipes are usually not as good as spiral steel pipes in terms of pressure bearing, and the cost is higher than spiral steel pipes. Therefore, large-diameter plastic-coated steel pipes are recommended to use spiral steel pipes as the base material, and seamless steel pipes are used when the demand is higher.

The main application areas of large-diameter plastic-coated steel pipes are distributed in: HVAC, municipal, industrial, sewage, and other fields. In the fields of HVAC and municipal, large-diameter plastic-coated steel pipes solve the problems of easy rust, easy scaling, and easy pollution of ordinary steel pipes. In addition, the service life of large-diameter plastic-coated steel pipes is 5-10 times longer than that of normal steel pipes, which greatly reduces the cost of pre-installation and pre-embedding of pipelines, the cost of later maintenance, and the cost of reinstallation and replacement after the service life is reached.

In the fields of industry and sewage, the substances usually discharged and transported have a certain pH value. Under the effect of long-term oxidation, the corrosion rate of steel pipes is usually dozens of times faster than the normal rate. The cost of large-diameter steel pipes is very high, and rapid corrosion causes the cost to soar. It fails to achieve the expected effect and loses the big picture for the small. With the use of large-diameter plastic-coated steel pipes, the pressure of the pipeline itself is not reduced, and the corrosion of the pipeline in pH and long-term oxidation in the air is reduced to almost zero.

Therefore, the service life of the pipeline is increased from a few years to decades. The service life has increased tenfold, but the cost is almost the same.

Large-diameter plastic-coated steel pipes have won the favor of the majority of users in the fields of HVAC, municipal administration, industry, sewage treatment, etc., relying on excellent performance, high-cost performance, energy saving and environmental protection, cleaning, and safety.