In the construction of municipal drainage, sewage and water conservancy projects, HDPE double-wall corrugated pipes have been widely used due to their excellent performance. Among them, HDPE double-wall corrugated pipes with 8-level buried depth (ie ring stiffness SN8) have become an ideal choice for scenarios that require deeper burial due to their excellent external pressure resistance. As a well-known enterprise in the industry, AD Pipeline's HDPE double-wall corrugated pipes (SN8 grade) have outstanding performance in ensuring engineering quality and long-term stability.
HDPE double-wall corrugated pipes have unique "double-wall" structural design. The inner wall is smooth and flat, which helps to reduce fluid transportation resistance and improve drainage efficiency; the outer wall adopts corrugated design, which greatly enhances the ring stiffness and impact resistance of the pipe. Grade 8 (SN8) represents the ring stiffness grade of the pipe, which specifically refers to the ability of the pipe's annular section to resist deformation when subjected to external pressure to reach 8kN/m ². This grade means that the pipe can adapt to deeper buried soil depths. Usually, under the premise of meeting the design specifications and construction requirements, SN8 HDPE double-wall corrugated pipe can meet the engineering requirements of buried depth of 3-5 meters or even deeper. The specific buried depth needs to be comprehensively determined according to the actual soil conditions, ground loads and other factors.
HDPE double-wall corrugated pipe (SN8 grade) produced by AD pipeline is strictly controlled in the selection of raw materials, and high-quality high-density polyethylene (HDPE) resin is used to ensure the strength, toughness and corrosion resistance of the pipe. In the production process, through the advanced extrusion molding process and strict quality control system, the dimensional accuracy and performance stability of each pipe are guaranteed. This pipe is not only light in weight, easy to transport and install, and effectively reduces the construction cost and labor intensity, but also has good chemical stability. It can resist the erosion of acid, alkali, salt and other chemical media. The service life can reach more than 50 years, which greatly reduces the later maintenance cost.
In practical engineering applications, AD HDPE double-wall corrugated pipe (SN8 grade) has shown excellent comprehensive performance. Whether it is in the transformation of drainage pipe network under urban roads, or in the sewage collection system in industrial parks, or in farmland water conservancy irrigation projects, it can reliably undertake the task of conveying media. Its strong ring stiffness makes the pipeline in the deep buried state, even under the action of external factors such as soil pressure and ground vehicle load, it is not easy to deform or damage, effectively ensuring the smooth operation of the drainage system. At the same time, the flexible connection method of the pipe (such as socket electric hot melt connection or rubber ring sealing connection) is not only convenient and fast to install, but also can adapt to a certain degree of foundation settlement, avoiding engineering problems caused by leakage at the pipeline connection.
To sum up, the HDPE double-wall corrugated pipe (SN8 grade) of AD pipeline has become an ideal pipe choice to meet the needs of deep buried engineering due to its excellent ring stiffness, reliable quality, long service life and convenient construction characteristics. It not only provides a solid pipeline system guarantee for various municipal and industrial projects, but also reflects AD Pipeline's professional strength in Product Research & Development and production and a high degree of responsibility for engineering quality. Choosing AD HDPE double-wall corrugated pipe (SN8 grade) is to choose an efficient, safe and economical pipeline solution.