HDPE double-wall corrugated pipe, Hubei rain and sewage pipe network construction material

HDPE double-wall corrugated pipe is a new type of structural wall pipe made of high-density polyethylene as the core raw material and processed by a special extrusion molding process. The inner wall is smooth milky white and the outer wall is a regular corrugated structure. It is one of the mainstream application pipes in the field of municipal drainage and sewage engineering in China. At present, Hubei is continuing to promote a series of infrastructure projects such as urban rain and sewage diversion transformation, municipal drainage and waterlogging prevention system construction, and county pipeline network upgrade. The pipe is suitable for many requirements of local climate, geology and construction scenarios. It is a common compliance material for the construction of Hubei rain and sewage pipe network.

Core practical selling point

1. Excellent structural mechanical properties, suitable for complex geological conditions in Hubei

The corrugated outer wall structure of HDPE double-wall corrugated pipe can effectively disperse external pressure, and the ring stiffness grade covers the whole range of SN4 to SN16, which can meet the engineering requirements of different burial depths and different load conditions. The geological conditions in Hubei are diverse, including both plain soft soil areas and hilly slopes. The groundwater level in some cities is high. The pipe has good anti-settlement and impact resistance, which can effectively reduce the risk of pipe damage and leakage caused by slight displacement of the foundation. Compared with traditional concrete pipes of the same diameter, its weight is about 1/8 of the former, which can effectively reduce transportation and hoisting costs. Under standard construction conditions, the operation efficiency is significantly improved compared with traditional pipes.

2. Stable anti-seepage and corrosion resistance, meeting the requirements of rain and sewage diversion construction

HDPE material itself has excellent chemical stability, can withstand the corrosion of acid and alkali substances in domestic sewage and conventional industrial wastewater, and is not prone to corrosion and perforation problems after long-term use. The pipe is equipped with two connection methods of hot melt butt and elastic sealing ring, and the interface sealing is good, and the leakage rate is much lower than that of traditional pipes. It can strictly implement the environmental protection requirements of rainwater and sewage diversion projects that sewage wastewater does not seep out and groundwater does not mix in. Under normal use and no external force man-made damage, the service life of the pipe can reach more than 50 years.

3. Outstanding flow capacity, suitable for drainage needs in Hubei flood season

The roughness coefficient of the inner wall of HDPE double-wall corrugated pipe is ≤0.009, and the surface smoothness is much higher than that of traditional concrete pipes. Under the same diameter and slope conditions, the overflow is about 30% higher than that of concrete pipes, which can improve drainage efficiency without expanding the diameter of the pipe network. Hubei belongs to the subtropical monsoon climate, and the summer rainfall is concentrated and intense, and some urban areas are prone to short-term waterlogging. The high overflow capacity of this pipe can effectively relieve the drainage pressure of the pipe network during the flood season and reduce the risk of urban waterlogging.

4. Strong construction adaptability, reducing the comprehensive cost of the project

The length of a single pipe can be customized according to the construction needs, effectively reducing the number of interfaces, reducing the hidden danger of leakage and improving the construction efficiency. The pipe is suitable for a variety of construction methods such as grooved laying and trenchless pipe jacking at the same time. For the scene of narrow operation space of pipe network transformation in the old city of Hubei, the trenchless process can be used for construction, without large-scale excavation of road surface, reducing the impact on urban traffic and normal life of residents; for the scene of sufficient operation surface of new pipe network in the suburbs, rapid grooved laying can be used to further compress the construction period. In the later operation and maintenance process, the inner wall is smooth and not easy to adhere to sundries, and the dredging difficulty is low, which can reduce long-term operation and maintenance

Applicable scenarios and suitable populations

The core application scenario of this pipe material is the urban new rain and sewage pipe network project in Hubei region, the old urban rain and sewage diversion renovation project, the main pipe network project of municipal drainage and waterlogging prevention, and it can also be adapted to the construction of the supporting drainage pipe network in the community, the construction of the wastewater discharge pipe network in the industrial park, the construction of the new rural domestic sewage collection pipe network, the farmland water conservancy irrigation and water transportation project, and the ecological water replenishment pipeline project along the river and lake.

The appropriate population includes construction units, construction contractors, purchasers, and technical selection personnel involved in municipal infrastructure projects, rain and sewage diversion renovations, real estate supporting construction, water conservancy projects, park construction, etc. The relevant parties can choose the corresponding ring stiffness and caliber products according to the actual buried depth parameters of the project, the properties of the conveying medium, and the construction conditions.

Compliance statement

The whole process of pipe production and testing strictly follows the national standard requirements of GB/T 19472.1-2019 "Buried Polyethylene (PE) Structural Wall Pipeline System, Part 1: Polyethylene Double Wall Corrugated Pipe", and all performance indicators comply with the "Urban Drainage and Sewage Treatment Regulations" and the relevant specifications of local municipal engineering construction in Hubei Province. It can meet the quality acceptance standards of various projects. Only by selecting models can we purchase products with suitable specifications according to the actual parameters of the project.