DN400 SN10 carat pipe, rain and sewage diversion engineering pipe

In the rain and sewage diversion reconstruction project, the ring stiffness and sealing reliability of the pipe directly determine the long-term operation quality of the pipe network. Carat pipes with DN400 caliber and SN10 ring stiffness are becoming a common choice in municipal drainage design due to the structural wall advantages brought by the high-density polyethylene winding molding process.

The carat pipe is connected by socket-type electrofusion, and the interface is fused and welded by pre-embedded electric heating elements to form a homogeneous joint of the same material as the pipe body, effectively avoiding the risk of leakage of the traditional interface. The SN10 ring stiffness means that the pipe can withstand a radial pressure of not less than 10 kN per square meter. Under municipal roads with large soil cover depth or occasional dynamic loads, the section can still be kept stable and the deformation can be prevented from reducing the flow section.

In the rain and sewage diversion scene, DN400 caliber is often used to connect branch pipes to main pipes. Its inner wall is smooth, the Manning coefficient is low, and the water transportation efficiency is better than that of traditional concrete pipes at the same slope, which helps to reduce the buried depth of pipelines and the amount of earthwork excavation. At the same time, the polyethylene material itself is resistant to acid and alkali corrosion, and has good tolerance to weak acid and alkali components in domestic sewage. It does not scale or breed microbial membranes in long-term operation, and the maintenance cost is low.

In the construction process, the weight of a single section of pipe is lighter than that of cement pipe, and the lifting and docking are flexible, so that the downhole assembly can be completed without large lifting equipment. The pipe can be cut in length according to the site demand, reducing the dependence on special-shaped parts. The design concept of flexible pipe-soil interaction enables the pipe body to be carried synergistically with the surrounding soil after backfilling and compacting, further developing the structural potential.

Overall, the DN400 SN10-carat pipe meets the dual requirements of long-term sealing and deformation resistance of the pipe in the current rain and sewage diversion project with reliable ring stiffness performance, zero leakage electrofusion interface and corrosion resistance. It is a practical solution to improve the collection efficiency of the pipe network and reduce the infiltration of groundwater.