HDPE double-wall corrugated pipe's outstanding advantages:

· High ring stiffness: The corrugated exterior wall structure scientifically distributes external pressure, making it extremely resistant to pressure, able to withstand soil and ground loads after burial.
· Lightweight and convenient to construct: The weight is only one-tenth that of cement pipes, making transportation and installation very convenient. Multiple connection methods are adopted, such as electric resistance melting connection or seal ring connection, which are fast and have good sealing performance.
· Corrosion-resistant, long life: Chemically stable, does not rust or scale, with a service life far exceeding that of traditional pipe materials.
· Good flexibility: Adapts to uneven settlement of foundations, with excellent seismic performance.

Plastic manholes: High-efficiency integrated "pipeline network hub station"

Plastic manholes, commonly known as "plastic sewer wells," are auxiliary structures placed at intersections, turns, changes in diameter, or falls in drainage pipes to facilitate regular inspections, cleaning, and drainage pipe maintenance. They have replaced traditional brick-built manholes and have various uses, including:

1. Pipe connection and branching:
· Application: As a "hub" of the pipeline system, HDPE corrugated dual-wall pipes connect from different directions, enabling the gathering, branching, and turning of sewage. For example, collecting sewage from branch pipes into the main pipe.