Plastic coated steel pipe has a wide range of applications

Advantages of plastic coated steel pipe

1. It retains the rigidity and strength of traditional metal pipes, which is far superior to plastic pipes and aluminum-plastic pipes;

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

3. It is light in weight, good in toughness, impact resistant, and high in compressive strength; the applicable temperature is wider -30℃～100℃;

4. The connection with pipe fittings can be twisted wire, socket, flange, groove, welding, etc., with multiple methods, saving labor and effort;

5. The difference in thermal expansion coefficient of the connection part with the pipe fittings is small, which is safer and more reliable;

6. The price-performance ratio is reasonable, the comprehensive cost is low, and it is more economical than copper pipes and stainless steel pipes. The steel belt in the middle of the mesh steel belt is punched with many holes, so that the inner and outer layers of PE are organically combined into one, thus solving the problem of steel and plastic composite, but sacrificing the oxygen barrier performance of the steel-plastic pipe. Moreover, due to the presence of the mesh on the steel belt, the compressive strength of this type of steel-plastic pipe is greatly reduced. Under high-pressure working conditions, the pipe is prone to local bursting.

The steel wire skeleton is developed on the basis of the mesh steel belt steel-plastic pipe. Since the mesh steel belt has lost its high-pressure resistance and oxygen barrier performance and only plays a partial pressure-bearing role, why do we need such difficult processes as steel belt forming and butt welding? Simply wrap the braided steel wire directly on the pipe wall, which can also play a pressure-bearing role. Therefore, the steel wire skeleton steel-plastic pipe appears. The performance of this pipe is basically similar to that of the mesh steel belt steel-plastic pipe. The plastic-coated composite steel pipe is a new type of composite material made of steel pipe as the matrix, and is melt-sprayed or adsorbed on the inner wall by a special process. Food-grade epoxy powder coating or PE raw materials are cured at high temperature. It has excellent corrosion resistance and relatively small friction resistance.

The plastic-coated steel pipe manufacturer uses fluidized bed suction coating technology, and the manufacturing process is fully automated and computer-controlled. The inner coating uses strong glue-type polymer polyethylene powder, and the outer coating adds anti-wear modifiers to form a stable and reliable epoxy resin coating film or polyethylene coating film protective layer with corrosion and oxidation resistance on the inner and outer surfaces of the steel pipe. The composite pipe integrates the mechanical properties of steel and the chemical corrosion resistance of engineering plastics, overcomes the defects of simple steel pipes that are easy to rust and highly pollute, and plastic pipes that have low strength and unreliable connections, and breaks through the limitations of ordinary plastic pipes that have low pressure bearing and high applicable conditions. It not only meets the high-strength use requirements of steel pipes, but also has the characteristics of plastic pipes such as corrosion resistance, no scaling, and low friction coefficient. Its safety performance indicators (flame retardant and antistatic indicators) reach the level of the highest-level gas pipes "fire retardation and explosion relief, explosion suppression and explosion resistance, multi-level protection, and ensuring safety". Therefore, it can be said that the plastic-coated steel pipe for gas extraction in coal mines is a new type of pipeline that is highly efficient, energy-saving, environmentally friendly, and corrosion-resistant.

To learn more, please visit the website: www.baowi-steel.com