HDPE steel belt reinforced spiral corrugated pipes combine the corrosion resistance of plastic and the toughness of steel, making their advantages obvious:
●Avoids the problem of cracking at the lap joints of single-layer structures
●High ring stiffness, with various specifications achievingSN8 and above
●Saves material costs, significantly reducing costs compared to all-plastic buried drainage pipes of the same diameter and ring stiffness
●Combination of steel and plastic: Uses unique bonding materials, with each layer securely and reliably bonded in a molten state
●Easy to construct, with excellent performance: Compared to traditional drainage pipes, it offers reliable sealing, long service life, flexibility, seismic resistance, lightweight, and convenient and fast construction
| No. | Item | Requirement | |
| 1 | Ring Stiffness (KN/㎡) | SN8 | ≥8 |
| SN10 | ≥10 | ||
| SN12.5 | ≥12.5 | ||
| SN16 | ≥8 | ||
| 2 | Impact Performance (TIR) | ≤10% |
|
| 3 | Ring Flexibility | Sample is smooth, no reverse bending, no cracking |
|
| 4 | Oven Test | No delamination or cracking at the weld of the drainage pipe |
|
| 5 | Creep Ratio | ≤2% |
|
| 6 | Tensile Strength of the Weld | Nominal Size/mmNominal Diameter | Minimum Tensile Force the Pipe Can Withstand (N） |
| 300≤DN/ID≤500 | 600 | ||
| 600≤DN/ID≤800 | 840 | ||
| 900≤DN/ID≤1200 | 1020 | ||
| 1300≤DN/ID≤2000 | 1460 | ||
| DN/ID≤2000 | 1600 | ||
| 7 | Ring Flexibility | Sample is smooth, no reverse bending, no cracking | |
| 8 | Oven Test | No delamination or cracking at the weld of the drainage pipe | |
| 9 | Creep Rate |
≤2% |
|
