American socket weld flange (SW flange) has a socket area in the bore, so pipe is inserted into the flange to the socket area end for socket welding connection. It mainly applies in high pressure small diameter piping system.
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″ | N8801-150 |
| 3/4″ / DN20 / 26.7mm | 100 | 69.9 | 4 x 5/8″ | N8802-150 |
| 1″ / DN25 / 33.4mm | 110 | 79.4 | 4 x 5/8″ | N8803-150 |
| 1-1/4″ / DN32 / 42.2mm | 115 | 88.9 | 4 x 5/8″ | N8804-150 |
| 1-1/2″ / DN40 / 48.3mm | 125 | 98.4 | 4 x 5/8″ | N8805-150 |
| 2″ / DN50 / 60.3mm | 150 | 120.7 | 4 x 3/4″ | N8806-150 |
| 2-1/2″ / DN65 / 73.0 / 76.1mm | 180 | 139.7 | 4 x 3/4″ | N8807-150 |
| 3″ / DN80 / 88.9mm | 190 | 152.4 | 4 x 3/4″ | N8808-150 |
Available size (Class 300)
| Size | Flange OD O (mm) | Bolt circle dia. W (mm) | Bolting (No. x hole) | Ref. No. |
|---|---|---|---|---|
| 1/2″ / DN15 / 21.3mm | 95 | 66.7 | 4 x 5/8″ | N8801-300 |
| 3/4″ / DN20 / 26.7mm | 115 | 82.6 | 4 x 3/4″ | N8802-300 |
| 1″ / DN25 / 33.4mm | 125 | 88.9 | 4 x 3/4″ | N8803-300 |
| 1-1/4″ / DN32 / 42.2mm | 135 | 98.4 | 4 x 3/4″ | N8804-300 |
| 1-1/2″ / DN40 / 48.3mm | 155 | 114.3 | 4 x 7/8″ | N8805-300 |
| 2″ / DN50 / 60.3mm | 165 | 127.0 | 8 x 3/4″ | N8806-300 |
| 2-1/2″ / DN65 / 73.0 / 76.1mm | 190 | 149.2 | 8 x 7/8″ | N8807-300 |
| 3″ / DN80 / 88.9mm | 210 | 168.3 | 8 x 7/8″ | N8808-300 |
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