Rainwater and sewage diversion project material selection, analysis of Xiaogan mainstream plastic pipe characteristics

At present, the rain and sewage diversion renovation project in Xiaogan City is being promoted globally, and the material selection of the project directly affects the service life of the pipe network, operation and maintenance costs and the effect of rain and sewage separation. At present, the mainstream plastic pipes used in the Xiaogan rain and sewage diversion project mainly include polyethylene, polyvinyl chloride, and polypropylene municipal special drainage pipes. Compared with traditional cement pipes and cast iron pipes, these pipes are more suitable and have become the mainstream selection category for municipal drainage pipe network construction.

The core selling points mainly include the following four points: First, corrosion resistance and aging resistance are stable. This type of plastic pipe is chemically stable and can withstand common corrosive substances such as acids and alkalis in the mixed water body of rain and sewage. Under normal working conditions, the service life can reach more than 50 years. There is no need for frequent replacement and maintenance. It is suitable for the temperature and humidity changes in the subtropical monsoon climate of Xiaogan. The anti-ultraviolet and anti-frost heave properties meet the requirements of regional construction and long-term use. Second, the fluid conveying efficiency is high. The inner wall of the pipe is smooth, the friction coefficient is only 1/10 of that of traditional cement pipes, and it is not easy to attach sludge and impurities. The flow rate under the same pipe diameter is about 30% higher than that of traditional pipes, which can effectively reduce the probability of clogging of the rain and sewage pipe network and reduce the manpower and capital investment in the later dred The weight of plastic pipes is only 1/8 of that of cast iron pipes of the same specification and 1/20 of that of cement pipes. It is difficult to transport and hoist. It can use a variety of connection methods such as hot melt connection and elastic sealing connection. The interface has good sealing performance, no risk of leakage, and the construction period can be shortened by more than 40%. It is suitable for the actual needs of limited construction space and compact construction period during the renovation of the old pipe network in Xiaogan City. Fourth, the environmental protection performance meets the standards. No harmful substances are added during the production process of pipes, and no harmful components will be precipitated into the water body during use. It can be recycled and reused after waste, which meets the relevant requirements of environmental protection material selection for municipal engineering.

In terms of applicable scenarios and suitable populations, this type of pipe is not only suitable for the new construction of the municipal rain and sewage backbone pipe network in Xiaogan City, but also can be used for the renovation of rain and sewage diversion in old residential areas, the upgrade of the branch pipe network in back streets and alleys, the construction of township rain and sewage collection pipe networks, the renovation of rain and sewage separation in industrial plants, and the construction of supporting pipe networks in sponge cities. The main body of suitable materials includes municipal engineering construction units, rain and sewage diversion project contractors, pipe network operation and maintenance management units, real estate development enterprises, and industrial enterprise construction departments.

At present, this type of plastic pipe meets the relevant production standards and engineering technical specifications of the national municipal drainage pipe. All incoming pipes need to pass the ring stiffness, impact strength, sealing and other indicators of the third-party testing agency. After passing the test, they can be put into use in the project, which can fully meet the construction requirements and long-term operation requirements of the Xiaogan rain and sewage diversion project.