Overview and types of steel-plastic composite pipe fittings

Overview

Steel-plastic composite pipe, the product is based on seamless steel pipe and welded steel pipe, and the inner wall is coated with high-adhesion, anti-corrosion, food-grade hygienic polyethylene powder coating or epoxy resin coating. The galvanized inner plastic coated composite steel pipe made by pre-treatment, preheating, inner coating, leveling and post-treatment processes is an upgraded product of the traditional galvanized pipe, and the steel-plastic composite pipe is generally threaded.

Types of

The plastic coated composite steel pipe is made of welded steel pipe and seamless steel pipe. The inner and outer walls are coated with epoxy resin or polyethylene powder. It is a green and environmentally friendly pipe with anti-corrosion, erosion resistance, non-toxicity and no radiation. It is applied to various fluid transportation. . The base pipe is a straight seam welded steel pipe that meets the requirements of GB/T3091-2008 for the base pipe; the base pipe is a seamless steel pipe that meets the requirements of GB/T8163-2008 for the base pipe; the base pipe is a spiral seam submerged arc welded steel pipe. The requirements of the base pipe of SY/T5037-2000 should be met.

This product has the following advantages.

1. It retains the steel and strength of traditional metal pipes, far superior to plastic pipes and aluminum-plastic pipes.

2. It has the characteristics of smooth inner wall, small friction resistance and no scaling, and the outer wall is more beautiful and luxurious;

3, light weight, good toughness, impact resistance, high compressive strength; applicable temperature is wider -30 ° C ~ 100 ° C;

4, the connection with the pipe fittings can be skein, socket, flange, groove, welding, etc., a variety of ways, labor saving;

5. The difference in thermal expansion coefficient between the joints with the pipe fittings is small, and it is safer and more reliable;

6. The price performance ratio is reasonable, the overall cost is low, and it is more economical than copper pipes and stainless steel pipes. The steel strip in the middle of the mesh belt is punched with a lot of holes, so that the inner and outer layers of PE are organically integrated into one, thus solving the problem of steel and plastic compounding, but sacrificing the oxygen barrier performance of the steel-plastic tube, and The existence of the mesh on the steel belt greatly reduces the compressive strength of this type of steel-plastic pipe. Under high-pressure working conditions, local cracking of the pipe is prone to occur.

It is developed on the basis of the steel mesh steel pipe of the mesh. Since the mesh-shaped steel strip has lost the performance of high pressure resistance and oxygen barrier, and only plays part of the pressure bearing role, why should the steel strip be formed and docked? Welding such a difficult process, simply winding the woven wire directly on the pipe wall, can also play a role in pressure, so there is a steel wire steel tube, the performance of this pipe and the mesh steel strip Plastic pipes are basically similar.