Winding pipe, English name Coil pipe, large diameter winding pipe, double wall winding pipe, hollow winding pipe is a kind of pipe formed by winding and welding with high density polyethylene (HDPE) as raw material. Due to its special molding process, it can produce pipes with a diameter of 3 meters, which is difficult to complete by other production processes. High density polyethylene (HDPE) not only ensures the product molding process and product quality due to its excellent melt welding performance, but also provides a variety of reliable methods for construction connections, such as electric hot melt welding, heat shrinkage connection, etc. At the same time, This is also an important reason why leakage rarely occurs, and it is precisely because of this reason that this kind of pipe has special environmental protection functions that other pipes do not have, which provides a very effective method for pollution prevention and control that people are currently concerned about. Since hollow wall wound pipe is a chemical building material, it is of great significance to save energy, reduce pollution and protect the environment.

1 The special-shaped structure profile extruded from the mouth die of the extrusion machine is evenly wound on the drum mold according to the predetermined position, and the PE molten material is extruded synchronously to weld the special-shaped structure profile into a whole, which ensures the quality of the structural wall tube weld joint. High quality of fusion seam

2 The pipeline adopts electric hot melt belt or heat shrinkable belt connection technology, which has fast construction, high connection quality and high joint strength to ensure the unity of interface material, structure and pipe body itself. Compared with rubber ring joints or other mechanical joints, there is no There is a danger of leakage caused by joints. At the same time, because the product is lighter in weight than other pipes under the same application conditions, it is easy to transport, convenient and fast in construction, and can reduce construction costs. In the application, the pipe can be directly applied without the need for concrete cushion and concrete pipe base trench. It can be excavated, piped and backfilled at the same time, which simplifies the construction procedure and shortens the construction period. Excellent installation performance, simple connection, reasonable and reliable joint sealing form

3 HDPE is a polymer, which makes the hollow wall wound pipe have good flexibility and overall external pressure resistance. When used under overweight load pavement, it can ensure passage. Due to the flexibility of the pipe, when geological activities such as earthquakes and uneven ground settlement occur, it can reduce the damage loss of the pipeline and improve the earthquake resistance and disaster mitigation ability of public facilities. Has good flexibility and seismic performance

4 The pipe is formed by winding process, which improves the ring stiffness of the pipe on the premise of saving materials. Has high ring stiffness

5 The inner wall roughness N of the hollow wall wound pipe is about 0.010, so the specific friction resistance when conveying fluid is small, and the water transmission can be greatly improved compared with the cement pipe under the same conditions of use. Therefore, the hollow wall wound pipe with a smaller inner diameter can be used to replace the cement pipe with a larger inner diameter, which reduces the project cost. The inner wall roughness of the pipe is low and the water delivery capacity is large. In the application, the reliability of the hollow wall wound pipe project under the same conditions will be improved compared with the traditional pipe material, and the comprehensive benefits are obvious, especially in the narrow construction site, dense construction, complex underground pipelines and heavy traffic sections, as well as in the laying of acid and alkali soils.