Suppliers with verified business licenses
Audited Supplier 
| Diameter DN/ID(mm) |
Minimum Mean Inside Diameter(mm) | Minimum Laminated Wall Thickness(mm) | Minimum Inner Wall Thickness(mm) | Suggestion Connection Length(mm) |
| 200 | 195 | 1.5 | 1.1 | 54 |
| 300 | 294 | 2.0 | 1.7 | 65 |
| 400 | 392 | 2.5 | 2.3 | 74 |
| 500 | 490 | 3.0 | 3.0 | 85 |
| 600 | 588 | 3.5 | 3.5 | 96 |
| 800 | 785 | 4.5 | 4.5 | 118 |
| 1000 | 985 | 5.0 | 5.0 | 140 |
| IDX | Diameter DN/ID(mm) |
Minimum Mean Inside Diameter(mm) | Minimum Inner Wall Thickness(mm) | Minimum Laminated Wall Thickness(mm) | The Biggest Pitch(mm) | Minimum Strip Thickness(mm) |
| 1 | 300 | 294 | 2.5 | 4.0 | 75 | 0.4 |
| 2 | 400 | 392 | 3.0 | 4.5 | 85 | 0.4 |
| 3 | 500 | 490 | 3.5 | 5.0 | 100 | 0.5 |
| 4 | 600 | 588 | 4.0 | 6.0 | 110 | 0.5 |
| 5 | 700 | 685 | 4.0 | 6.0 | 115 | 0.5 |
| 6 | 800 | 785 | 4.5 | 7.5 | 120 | 0.7 |
| 7 | 1000 | 985 | 5.0 | 8.0 | 150 | 0.7 |
| 8 | 1200 | 1185 | 5.0 | 8.0 | 180 | 0.7 |
| 9 | 2000 | 1985 | 6.0 | 9.0 | 235 | 1.0 |
| Item | Unit | Index | ||
| TIR | ≤10% | |||
| Flexible Ring | The pattern is smooth and the wall is not broken | |||
| Ring-stiffness | SN2 | KN/m² | ||
| SN4 | KN/m² | |||
| SN8 | KN/m² | |||
| Oven Test | No bubbles, no delamination, no cracking | |||
| Creep Ratio | ≤4 | |||
| IDX | Item | Unit | Index | ||
| 1 | Ring-stiffness | SN8 | KN/m² | ≥8 | |
| SN10 | KN/m² | ≥10 | |||
| SN12.5 | KN/m² | ≥12.5 | |||
| 2 | TIR | ≤10% | |||
| 3 | Peel Strength(23ºC±2ºC) | N/cm | ≥100 | ||
| 4 | Flexible Ring | The tube wall is not broken, and the two walls are not detached. | |||
| 5 | Oven Test | No delamination, no cracking. | |||
| 6 | Tensile Strength Of Laminated Wall Of Pipe | 300≤DN/ID≤500 | N | ≥600 | |
| 600≤DN/ID≤800 | N | ≥840 | |||
| 900≤DN/ID≤1200 | N | ≥1020 | |||
| 7 | Creep Ratio | ≤2 | |||
Suppliers with verified business licenses
Audited Supplier 
){kind=link}
){kind=link}