ASME/ANSI B16.5 Class 900 WN
| 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 | 120 | 34.9 | 22.3 | 38 | 21.3 | 60 | 15.8 | 82.6 | 22.2 | 4 | 1.86 |
| 3/4 | 130 | 42.9 | 25.4 | 44 | 26.7 | 70 | 21.0 | 88.9 | 22.2 | 4 | 2.55 |
| 1 | 150 | 50.8 | 28.6 | 52 | 33.4 | 73 | 26.6 | 101.6 | 25.4 | 4 | 3.78 |
| 1 1/4 | 160 | 63.5 | 28.6 | 64 | 42.2 | 73 | 35.1 | 111.1 | 25.4 | 4 | 4.40 |
| 1 1/2 | 180 | 73.0 | 31.8 | 70 | 48.3 | 83 | 40.9 | 123.8 | 28.6 | 4 | 6.12 |
| 2 | 215 | 92.1 | 38.1 | 105 | 60.3 | 102 | 52.5 | 165.1 | 25.4 | 8 | 10.86 |
| 2 1/2 | 245 | 104.8 | 41.3 | 124 | 73.0 | 105 | 62.7 | 190.5 | 28.6 | 8 | 15.20 |
| 3 | 240 | 127.0 | 38.1 | 127 | 88.9 | 102 | 77.9 | 190.5 | 25.4 | 8 | 13.53 |
| 4 | 290 | 157.2 | 44.5 | 159 | 114.3 | 114 | 102.3 | 235.0 | 31.8 | 8 | 22.14 |
| 5 | 350 | 185.7 | 50.8 | 190 | 141.3 | 127 | 128.2 | 279.4 | 34.9 | 8 | 36.14 |
| 6 | 380 | 215.9 | 55.6 | 235 | 168.3 | 140 | 154.1 | 317.5 | 31.8 | 12 | 47.04 |
| 8 | 470 | 269.9 | 63.5 | 298 | 219.1 | 162 | 202.7 | 393.7 | 38.1 | 12 | 80.64 |
| 10 | 545 | 323.8 | 69.9 | 368 | 273.0 | 184 | 254.5 | 469.9 | 38.1 | 16 | 118.62 |
| 12 | 610 | 381.0 | 79.4 | 419 | 323.8 | 200 | 304.7 | 533.4 | 38.1 | 20 | 158.37 |
| 14 | 640 | 412.8 | 85.8 | 451 | 355.6 | 213 | 336.5 | 558.8 | 41.3 | 20 | 180.07 |
| 16 | 705 | 469.9 | 88.9 | 508 | 406.4 | 216 | 387.3 | 616.0 | 44.5 | 20 | 217.98 |
| 18 | 785 | 533.4 | 101.6 | 565 | 457.0 | 229 | 437.9 | 685.8 | 50.8 | 20 | 292.21 |
| 20 | 855 | 584.2 | 108.0 | 622 | 508.0 | 248 | 488.9 | 749.3 | 54.0 | 20 | 362.66 |
| 24 | 1040 | 692.2 | 139.7 | 749 | 610.0 | 292 | 590.9 | 901.7 | 66.7 | 20 | 665.98 |
