All dimensions are in "mm" unless noted otherwise.
Dimensions of Class 150 Lap Joint Flanges as per ASME B16.5.
| Nominal Pipe Size |
Outside diameter of flange (D) |
Thick of flange (B) |
Diameter of Hub at base (A) |
Length thru Hub (H) |
Dia of bore (ID) |
Fillet radius (r) |
No of holes |
Dia of holes (L) |
Dia of bolts |
Diam of bolt circle (K) |
Approx weight kg |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 88.9 | 11.2 | 30.2 | 15.7 | 22.9 | 3 | 4 | 15.7 | 1/2 | 60.5 | 0.5 |
| 3/4 | 98.6 | 12.7 | 38.1 | 15.7 | 28.2 | 3 | 4 | 15.7 | 1/2 | 69.9 | 1 |
| 1 | 108 | 14.2 | 49.3 | 17.5 | 35.1 | 3 | 4 | 15.7 | 1/2 | 79.2 | 1 |
| 1-1/4 | 117.3 | 15.7 | 58.7 | 20.6 | 43.7 | 4.8 | 4 | 15.7 | 1/2 | 88.9 | 1 |
| 1-1/2 | 127 | 17.5 | 65 | 22.4 | 50 | 6.4 | 4 | 15.7 | 1/2 | 98.6 | 1 |
| 2 | 152.4 | 19.1 | 77.7 | 25.4 | 62.5 | 7.9 | 4 | 19.1 | 5/8 | 120.7 | 2 |
| 2-1/2 | 177.8 | 22.4 | 90.4 | 28.4 | 75.4 | 7.9 | 4 | 19.1 | 5/8 | 139.7 | 3 |
| 3 | 190.5 | 23.9 | 108 | 30.2 | 91.4 | 9.7 | 4 | 19.1 | 5/8 | 152.4 | 4 |
| 3-1/2 | 215.9 | 23.9 | 122.2 | 31.8 | 104.1 | 9.7 | 8 | 19.1 | 5/8 | 177.8 | 5 |
| 4 | 228.6 | 23.9 | 134.9 | 33.3 | 116.8 | 11.2 | 8 | 19.1 | 5/8 | 190.5 | 6 |
| 5 | 254 | 23.9 | 163.6 | 36.6 | 144.5 | 11.2 | 8 | 22.4 | 3/4 | 215.9 | 7 |
| 6 | 279.4 | 25.4 | 192 | 39.6 | 171.5 | 12.7 | 8 | 22.4 | 3/4 | 241.3 | 9 |
| 8 | 342.9 | 28.4 | 246.1 | 44.5 | 222.3 | 12.7 | 8 | 22.4 | 3/4 | 298.5 | 14 |
| 10 | 406.4 | 30.2 | 304.8 | 49.3 | 277.4 | 12.7 | 12 | 25.4 | 7/8 | 362 | 20 |
| 12 | 482.6 | 31.8 | 365.3 | 55.6 | 328.2 | 12.7 | 12 | 25.4 | 7/8 | 431.8 | 29 |
| 14 | 533.4 | 35.1 | 400.1 | 79.2 | 360.2 | 12.7 | 12 | 28.4 | 1 | 476.3 | 48 |
| 16 | 596.9 | 36.6 | 457.2 | 87.4 | 411.2 | 12.7 | 16 | 28.4 | 1 | 539.8 | 64 |
| 18 | 635 | 39.6 | 505 | 96.8 | 462.3 | 12.7 | 20 | 31.8 | 1-1/8 | 577.9 | 73 |
| 20 | 698.5 | 42.9 | 558.8 | 103.1 | 514.4 | 12.7 | 20 | 31.8 | 1-1/8 | 635 | 88 |
| 24 | 812.8 | 47.8 | 663.4 | 111.3 | 616 | 12.7 | 20 | 35.1 | 1-1/4 | 749.3 | 125 |