| Nominal Pipe Size | Outside Diameter of Flange | Diameter of Raised Face | Thickness of Flanges Min. | Diameter of Hub | Hub Diameter Beginning of Chamfer | Length Through Hub | Bore | Diameter of Bolt Circle | Diameter of Bolt Holes | Number of Bolts | Approxi-mate Weight kgs |
| NPS | O | R | tf | X | A | Y | B | W | I | n | |
| 1/2 | 135 | 34.9 | 30.2 | 43 | 21.3 | 73 | 15.8 | 88.9 | 22.2 | 4 | 3.23 |
| 3/4 | 140 | 42.9 | 31.8 | 51 | 26.7 | 79 | 21.0 | 95.2 | 22.2 | 4 | 3.74 |
| 1 | 160 | 50.8 | 35.0 | 57 | 33.4 | 89 | 26.6 | 108.0 | 25.4 | 4 | 5.34 |
| 1 1/4 | 185 | 63.5 | 38.1 | 73 | 42.2 | 95 | 35.1 | 130.2 | 28.6 | 4 | 7.84 |
| 1 1/2 | 205 | 73.0 | 44.5 | 79 | 48.3 | 111 | 40.9 | 146.0 | 31.8 | 4 | 11.10 |
| 2 | 235 | 92.1 | 50.9 | 95 | 60.3 | 127 | 52.5 | 171.4 | 28.6 | 8 | 16.21 |
| 2 1/2 | 265 | 104.8 | 57.2 | 114 | 73.0 | 143 | 62.7 | 196.8 | 31.8 | 8 | 23.40 |
| 3 | 305 | 127.0 | 66.7 | 133 | 88.9 | 168 | 77.9 | 228.6 | 34.9 | 8 | 36.10 |
| 4 | 355 | 157.2 | 76.2 | 165 | 114.3 | 190 | 102.3 | 273.0 | 41.3 | 8 | 54.89 |
| 5 | 420 | 185.7 | 92.1 | 203 | 141.3 | 229 | 128.2 | 323.8 | 47.6 | 8 | 92.52 |
| 6 | 485 | 215.9 | 108.0 | 235 | 168.3 | 273 | 154.1 | 368.3 | 54.0 | 8 | 143.61 |
| 8 | 550 | 269.9 | 127.0 | 305 | 219.1 | 318 | 202.7 | 438.2 | 54.0 | 12 | 211.29 |
| 10 | 675 | 323.8 | 165.1 | 375 | 273.0 | 419 | 254.5 | 539.8 | 66.7 | 12 | 408.58 |
| 12 | 760 | 381.0 | 184.2 | 441 | 323.8 | 464 | 304.7 | 619.1 | 73.0 | 12 | 572.56 |
Thewelding neck flangeis the best designed butt-welded flange of those currently available becuase of its inherent structural value.
Below you will find a short description and definition of each type, completed with an detailed image.
Our team is highly trained and experienced in servicing and producing all types of steel supplies.
