| DN | INCH | SCH 20 |
| 8 | 1/4" | |
| 10 | 3/8" | |
| 15 | 1/2" | - |
| 20 | 3/4" | - |
| 25 | 1" | - |
| 32 | 1¼" | - |
| 40 | 1½" | - |
| 50 | 2" | - |
| - | 2½" | - |
| 65 | - | - |
| 80 | 3" | - |
| - | 3½" | - |
| 100 | 4" | - |
| 125 | - | - |
| - | 5" | - |
| 150 | 6" | - |
| 200 | 8" | 6.35 |
| 250 | 10" | 6.35 |
| 300 | 12" | 6.35 |
| 350 | 14" | 7.92 |
| 400 | 16" | 7.92 |
| 450 | 18" | 7.92 |
| 500 | 20" | 9.53 |
| 600 | 24" | 9.53 |
| 700 | 28" | 12.7 |
| 750 | 30" | 12.7 |
| 800 | 32" | 12.7 |
| 900 | 36" | 12.7 |
| 1000 | 40" | - |
| 1200 | 48" | - |