Understanding of large-diameter blowdown PE corrugated pipeSteel belt pipe is also called steel belt reinforced polyethylene (HDPE) spiral corrugated pipe (hereinafter referred to as MRP) for underground drainage. It is a new type of plastic buried drainage pipe developed in China in recent years. The product is wound with spiral steel ribs pressed into an approximately ^ shape by a continuous steel belt between the inner and outer layers of heat fusion polyethylene, combining the high rigidity and high strength of steel with the flexibility, corrosion resistance and wear resistance of polyethylene . The production diameter range is 300-2200 mm, the length is 6-10 meters, and the ring rigidity can reach four levels: SN8, SN10, SN12.5, and SN16. It makes up for the past that the large-diameter plastic buried drainage pipes generally have a ring stiffness of only SN8 limits. This product can adopt a variety of connection methods to meet different engineering needs, which satisfies the requirements of sealing reliability and convenient connection construction.
Steel pipe is a kind of winding and forming structure wall pipe which is developed by drawing on the advanced metal-plastic pipe composite technology from abroad. The structure of the pipe wall is composed of three layers. The spirally formed high-strength steel belt is used as the reinforcement, and the high-density polyethylene is used as the matrix. The unique manufacturing process is used to fuse the steel belt and high-density polyethylene into one body to make it It has both the flexibility of plastic pipes and the rigidity of metal pipes, which is suitable for municipal engineering applications with large buried depth.
Steel pipe advantages:
1. High rigidity and strong resistance to external pressure: Because the steel belt reinforced PE spiral corrugated pipe adopts "U" steel belt reinforcement in the middle layer, it has extremely high rigidity.
2. The pipe wall is firmly bonded: the bonding of each layer is firm. There is a transition layer between the steel belt and the PE. The material of the transition layer enhances the bonding ability of the PE and the steel belt, and has a strong function of blocking oxygen and moisture to avoid corrosion of the steel belt.
3. Convenient construction, diverse connection methods, safe and reliable connection: Steel belt reinforced PE spiral corrugated pipe has low requirements for basic treatment, construction is not restricted by seasons and temperature, the pipe has good bendability, light weight and easy construction. There are various connection methods, such as heat shrinkable tape connection, electric fusion connection, PE welding gun extrusion welding, etc., which can effectively ensure the connection strength.
4. Excellent wear resistance and good drainage circulation: the steel skeleton reinforced spiral double-wall corrugated pipe has a smooth interior, low friction damping coefficient, and small surface roughness coefficient. Compared with a concrete pipe of the same inner diameter, the water delivery volume is increased by more than 40% under the same conditions .