The HDPE spiral structured wall (A) type pipe features smooth inner and outer surfaces, with square spiral connectors between the inner and outer walls. It belongs to flexible pipes, offering good ductility and strong resistance to compression and uneven settlement, thereby enhancing the seismic resistance and disaster mitigation capabilities of public infrastructure. This product is characterized by a reliable manufacturing process, a wide production range, and stable product performance. It represents a newly developed, rapidly emerging type of underground drainage pipe that is well-received and widely used in the market.