Introduction of Steel-Plastic Pipe Products

Introduction of Steel-Plastic Pipe Products

Steel-plastic pipe, the product is based on seamless steel pipe and welded steel pipe, the inner wall is coated with high adhesion, anti-corrosion, food-grade sanitary polyethylene powder coating or epoxy resin coating. Zinc-coated and plastic-coated composite steel pipes for water supply are made by pretreatment, preheating, internal coating, leveling and post-treatment processes. They are upgraded products of traditional galvanized pipes. Steel-plastic composite pipes are generally connected by threads.

Product introduction

structure

A new kind of composite pipe is called steel-plastic pipe in many places. Steel is a kind of iron material; plastic refers to plastics. The plastics in steel-plastic composite pipes are generally high density polyethylene (HDPE).

There are many kinds of steel-plastic composite pipes, which can be classified according to the structure of the pipes: steel belt reinforced steel-plastic composite pipes, seamless steel pipe reinforced steel-plastic composite pipes, hole-mesh steel-plastic composite pipes and steel mesh framework steel-plastic composite pipes. At present, the most popular one on the market is steel-reinforced steel-plastic composite pipe, that is, we

Steel-plastic Composite Pipe Structure

Steel-plastic Composite Pipe Structure

The steel-plastic composite pressure pipe is often said to be a steel strip layer formed by butt welding of high carbon steel strip through crimping, and the inner and outer layers are high density polyethylene (HDPE). The middle layer of the pipe is steel strip, so the pressure-bearing performance of the pipe is very good, unlike that of the aluminium strip, the maximum diameter of the pipe can only be 63 mm, and the maximum diameter of the steel-plastic pipe can be 200 mm or even larger. Because the steel strip in the middle layer of the pipe is sealed, the steel-plastic pipe has the function of oxygen resistance and can be directly used in direct drinking water projects, while the inner and outer layers are plastic. Material, with very good corrosion resistance. With such excellent performance, steel-plastic composite pipes are widely used in oil and natural gas transportation, industrial and mining pipes, drinking pipes, drainage pipes and other fields.

Nature

The production process of steel strip reinforced steel-plastic composite pipe is complex. Steel strip is different from aluminium strip, it has almost no flexibility, so the forming process of steel strip is very demanding. Secondly, steel strip is usually thicker than aluminium strip. It can not be welded by lap welding, but by butt welding with high precision. Finally, even if the steel strip is processed into fully qualified steel pipe, what kind of technology can be used to make the steel strip and PE perfectly combined, which becomes another difficult problem in the manufacture of steel-plastic composite pipe. In 2003, the Ministry of National Construction promulgated CJ/T183-2003 Steel-Plastic Composite Pressure Pipe Standard (revised to CJ/T183-2008 standard again in 2008).

Despite its incomparable advantages compared with other pipes, the complexity of its production process and the requirement of high-end technology make many pipe manufacturers hesitate. As a result, seamless steel pipe reinforced steel-plastic composite pipes, perforated steel-plastic composite pipes and steel-net framework steel-plastic composite pipes have emerged.