High-density polyethylene (HDPE) double-wall corrugated pipe is a new type of pipe with an annular structure outer wall and a smooth inner wall. The cross-section of the pipe wall is a double-layer structure. The inner wall is smooth and flat, and the outer walls are equidistantly arranged with a trapezoidal hollow structure. Pipes are connected using rubber rings. Main Features: Strong external pressure resistance. The outer wall has an annular corrugated structure, which greatly enhances the ring stiffness of the pipe and thereby enhances the pipe’s resistance to soil load. In this aspect, HDPE double-wall corrugated pipes have obvious advantages compared with other pipes. Advantages. In my country, the promotion and application of HDPE double-wall corrugated pipes are on the rise, and all technical indicators have reached usage standards.