DN800 SN20 carat pipe, large municipal drainage pipe

In the construction of large-scale municipal drainage pipe networks, DN800 SN20 carat pipes are being included in more and more engineering projects due to their structural design and ring stiffness performance. DN800 refers to the nominal inner diameter of the pipeline of 800 mm, which is more common in municipal trunk pipes and rainwater drainage systems and can meet the drainage needs of medium and above flow. SN20 represents the ring stiffness of 20 kN per square meter, which belongs to the high ring stiffness grade, which means that the pipeline has strong deformation resistance when withstanding external loads and earth pressure.

The carat pipe adopts the hot winding molding process, and the pipe wall is composed of polyethylene material and waveform reinforcing ribs to form a hollow spiral structure. This structure not only ensures the overall strength of the pipe, but also effectively reduces its own weight, which provides convenience for transportation and on-site hoisting. For DN800 caliber pipes, the standard effective length is usually 6 meters. The interface is mostly made of socket electric fusion connection or rubber ring sealing socket connection. When installing, the socket and socket need to be cleaned to ensure that the sealing surface is free of foreign objects, and then the docking is completed according to the specifications.

In practical applications, the DN800 SN20 carat pipe is suitable for municipal sewage trunk pipes, rainwater drainage trunk pipes and some industrial wastewater collection systems. Its inner wall is smooth, and the Manning roughness coefficient is low, which is conducive to maintaining a stable drainage slope and reducing the risk of siltation. At the same time, the polyethylene material has good chemical corrosion resistance, and has strong tolerance to acid and alkali components in domestic sewage and general industrial wastewater, which helps to prolong the overall service life of the pipe network.

In the construction process, attention should be paid to the treatment of the trench base. The pipeline should be laid on the cushion that meets the design requirements. The backfill material should be symmetrically layered and tamped to avoid the deviation of the pipeline. In areas with soft soil foundation or high groundwater level, foundation reinforcement and drainage measures should also be taken to ensure the long-term operation and stability of the pipeline. Only by combining reasonable selection with standardized construction can the comprehensive advantages of DN800 SN20 carat pipes in large-scale municipal drainage projects be fully realized.