HDPE carat pipe is a new type of plastic pipe made of high-density polyethylene (HDPE) as the main raw material through a special process. It has the characteristics of light weight, high strength and corrosion resistance, and is widely used in various underground infrastructure buildings. Among them, the model with ring stiffness up to 20kN/m 2 is the concentrated embodiment of its performance advantages. In soft soil foundation, heavy traffic area or high water level environment, this ring stiffness value means that the pipeline can effectively resist external pressure and soil load, avoid deformation or damage, and ensure long-term stable operation of the pipeline system. Whether it is the upgrading of municipal drainage and sewage systems, or the laying of underground pipelines in construction projects, or agricultural irrigation, water conservancy projects and other fields, HDPE carat pipe ring stiffness 20kN/m 2 model can rely on its high strength characteristics to provide reliable underground pipeline solutions for projects, reduce later maintenance costs, and ensure the safety and durability of infrastructure.