In the face of HDPE double-wall corrugated pipes marked S1 and S2 on the market, many engineers and users are often confused about how to distinguish them. In fact, S1 and S2 of HDPE double-wall corrugated pipes are mainly divided according to ring stiffness. Mastering the correct distinction method will help to select the appropriate pipe in the project and ensure the quality of the project.

ring stiffness is the core index to distinguish HDPE double-wall corrugated pipes S1 and S2. Ring stiffness refers to the ability of the pipeline to resist external pressure. The larger the value, the stronger the pipeline's ability to withstand external pressure. In the national standard, S1 grade HDPE double-wall corrugated pipe has a ring stiffness of not less than 4kN/m2, which is suitable for some scenarios with relatively low external pressure requirements, such as the laying of drainage pipes under roads in residential areas, or small drainage projects in green belts. In these environments, S1 grade pipes can meet basic compressive requirements while controlling engineering costs. The S2 grade HDPE double-wall corrugated pipe has a ring stiffness of not less than 8kN/m2, which has higher strength and compressive performance. It is often used in busy traffic sections, heavy-duty vehicle traffic areas, and municipal drainage projects with large buried depths. For example, in the main road drainage system transformation of Shishou City, due to the large traffic flow and heavy load on the road, the use of S2 grade HDPE double-wall corrugated pipe can effectively resist the pressure caused by vehicle rolling and soil extrusion, and ensure the long-term stable operation of the drainage pipe.

In addition to ring stiffness, the ring flexibility of HDPE double-wall corrugated pipe is also an important indicator to measure the performance of the pipe. Although it is not a direct basis for distinguishing between S1 and S2, it is complementary to ring stiffness. Ring flexibility reflects the flexibility of the pipe. Good ring flexibility allows HDPE double-wall corrugated pipe to disperse the pressure through reasonable deformation when exposed to external pressure, so as to avoid pipe rupture due to stress concentration. Whether it is S1 or S2 grade pipes, they need to have a certain degree of ring flexibility to adapt to different construction environments and geological conditions.

want to accurately distinguish the S1 and S2 of HDPE double-wall corrugated pipes, it can be determined by checking the product identification and inspection report. HDPE double-wall corrugated pipes produced by regular manufacturers will clearly mark the specifications, ring stiffness grade and other information of the product on the surface or outer packaging of the pipe. Just look carefully, you can initially understand whether the pipe belongs to S1 or S2 grade. The inspection report is a more authoritative basis for judgment. Professional HDPE double-wall corrugated pipe manufacturers will send the pipe to a qualified testing agency for comprehensive testing before the product leaves the factory, and issue a detailed inspection report. The report will clearly record the ring stiffness, ring flexibility and other performance indicators of the pipe. By looking at the inspection report, engineers can accurately judge the specific grade of the pipe to ensure that the purchased pipe meets the engineering design requirements.

In the engineering construction of Shishou City, Honghu City, Songzi City, Jianli City, Public Security County, Jiangling County and other places, it is crucial to choose high-quality HDPE double-wall corrugated pipe manufacturers. As a professional pipe manufacturer, Hubei AD Building Materials Co., Ltd. strictly follows the national standard to produce HDPE double-wall corrugated pipes. Whether it is S1 or S2 grade products, every link is strictly controlled from raw material procurement, production and processing to finished product inspection. The HDPE double-wall corrugated pipes produced by the company not only have excellent ring stiffness and ring flexibility performance, but also have clear product identification, which can provide real and effective inspection reports. In addition, the company also has a professional technical team, which can provide customers with pipe selection suggestions. According to the load requirements of different projects, construction environment and other factors, recommend suitable grades of HDPE double-wall corrugated pipes to ensure the smooth progress of the project. If you have pipe procurement and related technical consultation needs, please call 17399989993, Hubei AD Building Materials Co., Ltd. will serve you wholeheartedly.

accurately distinguish the S1 and S2 of HDPE double-wall corrugated pipes, which is of great significance to engineering construction. By paying attention to the ring stiffness, checking the product identification and inspection report, and choosing the appropriate grade of pipe according to the actual needs of the project, the quality of the project can be effectively guaranteed. Hubei Au Yuan Building Materials Co., Ltd. has helped Shishou City, Honghu City, Songzi City, Jianli City, Public Security County, Jiangling County and other places with high-quality products and professional services, and contributed to the construction of various projects in Shishou City, Honghu City, Songzi City, Jianli City, and Public Security County and Jiangling County.