| 管径 (inch) | 最小进尺 (mm) | 最大弯曲角度 (˚) |
| 6 | 300 | 4.5 |
| 8 | 300 | 3.8 |
| 10 | 300 | 2.8 |
| 12 | 300 | 2.3 |
| 14 | 300 | 1.7 |
| 16 | 300 | 1.5 |
| 18 | 300 | 1.2 |
| 20 | 450 | 0.9 |
| 24 | 450 | 0.75 |
| 30 | 450 | 0.6 |
| ≥36 | 450 | 0.5 |