Flange Types And Dimensions
| Size | Standard | Class | Outside ø | Pitch Circle ø | Bolt Hole ø | No. of Bolt Holes |
|---|---|---|---|---|---|---|
| 1/2″ (DN15) | ASME B16.5 | 150 | 90 | 60.3 | 15.9 | 4 |
| 300 | 95 | 66.7 | 15.9 | 4 | ||
| 3/4″ (DN20) | ASME B16.5 | 150 | 100 | 69.9 | 15.9 | 4 |
| 300 | 115 | 82.6 | 19.1 | 4 | ||
| 1″ (DN25) | ASME B16.5 | 150 | 110 | 79.4 | 15.9 | 4 |
| 300 | 125 | 88.9 | 19.1 | 4 | ||
| 1 1/2″ (DN40) | ASME B16.5 | 150 | 125 | 98.4 | 15.9 | 4 |
| 300 | 155 | 114.3 | 22.2 | 4 | ||
| 2″ (DN50) | ASME B16.5 | 150 | 150 | 120.7 | 19.1 | 4 |
| 300 | 165 | 127 | 19.1 | 8 | ||
| 3″ (DN80) | ASME B16.5 | 150 | 190 | 152.4 | 19.1 | 4 |
| 300 | 210 | 168.3 | 22.2 | 8 | ||
| 4″ (DN100) | ASME B16.5 | 150 | 230 | 190.5 | 19.1 | 8 |
| 300 | 255 | 200 | 22.2 | 8 | ||
| 6″ (DN150) | ASME B16.5 | 150 | 280 | 241.3 | 22.2 | 8 |
| 300 | 320 | 269.9 | 22.2 | 12 | ||
| 8″ (DN200) | ASME B16.5 | 150 | 345 | 298.5 | 22.2 | 8 |
| 300 | 380 | 330.2 | 25.4 | 12 | ||
| 10″ (DN250) | ASME B16.5 | 150 | 405 | 362 | 25.4 | 12 |
| 300 | 445 | 87.4 | 28.6 | 16 | ||
| 12″ (DN300) | ASME B16.5 | 150 | 485 | 431.8 | 25.4 | 12 |
| 300 | 520 | 450.8 | 31.8 | 16 | ||
| 14″ (DN350) | ASME B16.5 | 150 | 535 | 476.3 | 28 | 12 |
| 300 | 585 | 514.4 | 32 | 20 |
