| DN | INCH | DIN | ISO | EN | ASME |
| 15 | 1/2" | 20 | 21.3 | 21.3 | 21.3 |
| 20 | 3/4" | 25 | 26.9 | 26.9 | 26.9 |
| 25 | 1" | 30 | 33.7 | 33.7 | 33.7 |
| 32 | 1¼" | 38 | 42.4 | 42.4 | 42.4 |
| 40 | 1½" | 44.5 | 48.3 | 48.3 | 48.3 |
| 50 | 2" | 57 | 60.3 | 60.3 | 60.3 |
| - | 2½" | - | - | - | 73 |
| 65 | - | 76.1 | 76.1 | 76.1 | - |
| 80 | 3" | 88.9 | 88.9 | 88.9 | 88.9 |
| - | 3½" | - | - | 101.6 | 101.6 |
| 100 | 4" | 108 | 114.3 | 114.3 | 114.3 |
| 125 | - | 133 | 139.7 | 139.7 | - |
| - | 5" | - | - | - | 141.3 |
| 150 | 6" | 159 | 168.3 | 168.3 | 168.3 |
| 200 | 8" | 216 | 219.1 | 219.1 | 219.1 |
| 250 | 10" | 267 | 273 | 273 | 273 |
| 300 | 12" | 318 | 323.9 | 323.9 | 323.8 |
| 350 | 14" | 368 | 355.6 | 355.6 | 355.6 |
| 400 | 16" | 419 | 406.4 | 406.4 | 406.4 |
| 450 | 18" | 470 | 457 | 457 | 457 |
| 500 | 20" | 521 | 508 | 508 | 508 |
| 600 | 24" | 622 | 610 | 610 | 610 |
| 700 | 28" | 720 | 711 | 711 | 711 |
| 750 | 30" | - | - | 762 | 762 |
| 800 | 32" | 820 | 813 | 813 | 813 |
| 900 | 36" | 920 | 914 | 914 | 914 |
| 1000 | 40" | 1020 | 1016 | 1016 | 1016 |
| 1200 | 48" | - | 1220 | 1219 | 1219 |
