American welding neck flange (WN flange) features a hub whose size matches the pipe for butt welding connection, so the stress is transferred from the flange to the pipe. It is mainly used for high pressure and temperature applications.
Available size (Class 150)
| Size | Flange OD O (mm) | Bolt circle dia. W (mm) | Bolting (No. x hole) | Ref. No. |
|---|---|---|---|---|
| 1/2″ / DN15 / 21.3mm | 90 | 60.3 | 4 x 5/8″ | N8601-150 |
| 3/4″ / DN20 / 26.7mm | 100 | 69.9 | 4 x 5/8″ | N8602-150 |
| 1″ / DN25 / 33.4mm | 110 | 79.4 | 4 x 5/8″ | N8603-150 |
| 1-1/4″ / DN32 / 42.2mm | 115 | 88.9 | 4 x 5/8″ | N8604-150 |
| 1-1/2″ / DN40 / 48.3mm | 125 | 98.4 | 4 x 5/8″ | N8605-150 |
| 2″ / DN50 / 60.3mm | 150 | 120.7 | 4 x 3/4″ | N8606-150 |
| 2-1/2″ / DN65 / 73.0 / 76.1mm | 180 | 139.7 | 4 x 3/4″ | N8607-150 |
| 3″ / DN80 / 88.9mm | 190 | 152.4 | 4 x 3/4″ | N8608-150 |
| 4″ / DN100 / 114.3mm | 230 | 190.5 | 8 x 3/4″ | N8609-150 |
| 5″ / DN125 / 141.3mm | 255 | 215.9 | 8 x 7/8″ | N8610-150 |
| 6″ / DN150 / 165.1 / 168.3mm | 280 | 241.3 | 8 x 7/8″ | N8611-150 |
| 8″ / DN200 / 219.1mm | 345 | 298.5 | 8 x 7/8″ | N8612-150 |
| 10″ / DN250 / 273.0mm | 405 | 362.0 | 12 x 1″ | N8613-150 |
| 12″ / DN300 / 323.8mm | 485 | 431.8 | 12 x 1″ | N8614-150 |
| 14″ / DN350 / 355.6mm | 535 | 476.3 | 12 x 1-1/8″ | N8615-150 |
Note: Please download our catalog for more available sizes.
