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Steel-plastic composite pipe

Update:01-03-2019
Summary:

An emerging composite pipe and pipe, many places referr […]

An emerging composite pipe and pipe, many places referred to as steel-plastic pipe. Steel refers to spiral tube, seamless tube, straight seam tube, elbow, etc.; plastic, refers to plastic, plastic in steel-plastic composite tube is generally high densityThere are many classifications of steel-plastic composite pipes, which can be classified according to the structure of pipes seamless steel-reinforced steel-plastic composite pipes, steel mesh steel-plastic composite pipes and steel mesh skeleton steel-plastic composite pipes. Currently, the most popular on the market is steel-reinforced steel-plastic composite pipes.

It is often said that the steel-plastic composite pressure pipe, the middle layer of the pipe is a steel strip layer formed by butt welding of a high carbon steel belt, and the inner and outer layers are high density polyethylene. The middle layer of the pipe is steel belt, so the pressure bearing performance of the pipe is very good. Unlike the aluminum belt, the pressure is not high, the maximum diameter of the pipe can only be 63mm, and the maximum diameter of the steel pipe can be 200mm or even larger; Since the steel strip of the middle layer of the pipe is sealed, the steel-plastic pipe has the oxygen barrier effect and can be directly used for the direct drinking water project, and the inner and outer layers are made of plastic material, which has very good corrosion resistance.

Such excellent performance makes the steel-plastic composite pipe widely used, and oil, natural gas transportation, industrial and mining pipes, drinking water pipes, drain pipes and the like can be seen in various fields.nature The production process of steel strip reinforced steel-plastic composite pipe is complicated. The steel strip is different from the aluminum strip, and it has almost no flexibility. Therefore, the forming process of the steel strip is very demanding. Secondly, the steel strip is usually thicker than the aluminum strip and cannot be welded by the lap welding process. Only the butt welding process with extremely high precision can be used.

Finally, even if the steel strip is processed into a steel pipe that completely meets the requirements, what kind of process can be used to make the steel strip and PE perfectly combined, and it becomes another problem in the manufacture of steel-plastic composite pipe. In 2003, the Ministry of Construction of the People's Republic of China introduced the CJ/T183-2003 "Steel-Plastic Composite Pressure Pipe Standard".Although the steel-reinforced steel-plastic composite pipe has advantages that other pipes cannot match, the complexity of its production process and the requirements for high-precision technology have made many pipe manufacturers discouraged. Therefore, there is a seamless steel pipe reinforced steel. The appearance of these types of pipes, such as composite pipes, steel mesh steel-plastic composite pipes and steel mesh skeleton steel-plastic composite pipes.

PPR Pipe