| 管径 （DN） | 0.4 m/s | 0.5 m/s | 0.6 m/s | 0.7 m/s | 0.8 m/s | 1.0 m/s | 1.2 m/s | 1.4 m/s | 1.6 m/s | 2.0 m/s | 2.5 m/s | 3.0 m/s | 3.5 m/s | 4.0 m/s |
|-----------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|
| 15| - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 20| 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 25| - | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 32| - | - | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 40| - | - | - | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 50| - | - | - | - | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 65| - | - | - | - | - | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 80| - | - | - | - | - | - | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 100 | - | - | - | - | - | - | - | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 125 | - | - | - | - | - | - | - | - | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
| 150 | - | - | - | - | - | - | - | - | - | 150 | 200 | 250 |