NORWEGIAN NS Flange Dimensions
| Nominal Pipe OD | Flange Size | OD | ID | Minimum Thickness | PCD | Bolt Hole No. X Dia. | Bolt Size |
|---|
| 15 | 15 | 95 | 28 | 14 | 65 | 4X14 | M12 |
| 25 | 20 | 105 | 34 | 16 | 75 | 4X14 | M12 |
| 32 | 25 | 115 | 42 | 16 | 85 | 4X14 | M12 |
| 40 | 32 | 140 | 51 | 18 | 100 | 4X18 | M16 |
| 50 | 40 | 150 | 62 | 18 | 110 | 4X18 | M16 |
| 63 | 50 | 165 | 78 | 20 | 125 | 4X18 | M16 |
| 75 | 65 | 185 | 92 | 20 | 145 | 8X18 | M16 |
| 90 | 80 | 200 | 108 | 20 | 160 | 8X18 | M16 |
| 110 | 100 | 220 | 128 | 22 | 180 | 8X18 | M16 |
| 125 | 100 | 220 | 135 | 22 | 180 | 8X18 | M16 |
| 140 | 125 | 250 | 158 | 22 | 210 | 8X18 | M16 |
| 160 | 150 | 285 | 178 | 24 | 240 | 8X22 | M20 |
| 180 | 150 | 285 | 188 | 24 | 240 | 8X22 | M20 |
| 200 | 200 | 340 | 235 | 26 | 295 | 12X22 | M20 |
| 225 | 200 | 340 | 238 | 26 | 295 | 12X22 | M20 |
| 250 | 250 | 405 | 288 | 28 | 355 | 12X26 | M24 |
| 280 | 250 | 405 | 294 | 28 | 355 | 12X26 | M24 |
| 315 | 300 | 460 | 338 | 32 | 410 | 12X26 | M24 |
| 355 | 350 | 520 | 376 | 35 | 470 | 16X26 | M24 |
| 400 | 400 | 580 | 430 | 38 | 525 | 16X29.5 | M27 |
| 450 | 450 | 640 | 470 | 42 | 585 | 20X29.5 | M27 |
| 500 | 500 | 715 | 533 | 46 | 650 | 20X32.5 | M30 |
| 560 | 600 | 840 | 618 | 52 | 770 | 20X35.5 | M33 |
| 630 | 600 | 840 | 645 | 52 | 770 | 20X35.5 | M33 |
| 710 | 700 | 910 | 740 | - | 840 | 24X35.5 | M33 |
| 800 | 800 | 1025 | 843 | - | 950 | 24X39 | M36 |
| 900 | 900 | 1125 | 947 | - | 1050 | 28X39 | M36 |
| 1000 | 1000 | 1255 | 1050 | - | 1170 | 28X42 | M39 |
