HDPE double wall corrugated pipe is a special pipeline produced from high-density polyethylene, with smooth inner walls, corrugated outer walls, and hollow inner and outer walls. It is mainly used for buried sewage and drainage systems. The socket of this product adopts a double-layer pipe wall, which is expanded online during production and formed in one go, avoiding the disadvantage of easy deformation caused by the thin pipe wall of the single-layer pipe wall. The double-layer pipe wall is relatively hard, and it is flexibly connected using natural rubber sealing rings, which is easy to install, reliable to connect, not easy to leak, low in overall cost, and has a lifespan of up to 50 years.