Manufactured mainly from high-density polyethylene (HDPE).
This new type of pipe is produced via double-layer co-extrusion, featuring an annular outer wall and smooth inner wall. It balances high ring stiffness and low water resistance, serving as the primary pipeline for rainwater-sewage diversion, drainage & sewer networks, community pipe networks, industrial sewage discharge and farmland drainage in municipal and construction projects.
| Item | Technical Index | Remarks |
| Executive Standard | GB/T 19472.1-2019 | Complies with the latest national standard |
| Nominal Outer Diameter | DN200-DN1000 | Custom special specifications available |
| Ring Stiffness Grade | SN4/SN8/SN12.5 | Select based on burial depth and geological conditions |
| Impact Strength (TIR) | ≤10% | Meets standard assessment requirements |
| Connection Method | Socket joint with rubber ring sealing | Easy construction & reliable tightness |
| Operating Temperature Range | -40℃ ~ +60℃ | Adapts to extreme climates |
| Standard Length | 6 m per piece | - |
A: Please provide the required nominal outer diameter (DN), ring stiffness grade (SN4/SN8), total purchase length and delivery address. We will calculate the ex-factory price including freight for you.
A: Over 50 years under standard construction.
A: Double-wall corrugated pipe (conventional diameter ≤DN800) fits general deep burial; winding pipe can reach DN1500 and above, suitable for large flow and deep burial scenarios.