All dimensions are in "mm" unless noted otherwise.
Dimensions of Class 1500 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 | 120.7 | 22.4 | 38.1 | 31.8 | 22.9 | 3 | 4 | 22.4 | 3/4 | 82.6 | 2 |
| 3/4 | 130 | 25.4 | 44.5 | 35.1 | 28.2 | 3 | 4 | 22.4 | 3/4 | 88.9 | 2 |
| 1 | 149.4 | 28.4 | 52.3 | 41.1 | 35.1 | 3 | 4 | 25.4 | 7/8 | 101.6 | 4 |
| 1-1/4 | 158.8 | 28.4 | 63.5 | 41.1 | 43.7 | 4.8 | 4 | 25.4 | 7/8 | 111.3 | 4 |
| 1-1/2 | 177.8 | 31.8 | 69.9 | 44.5 | 50 | 6.4 | 4 | 28.4 | 1 | 124 | 5 |
| 2 | 215.9 | 38.1 | 104.6 | 57.2 | 62.5 | 7.9 | 8 | 25.4 | 7/8 | 165.1 | 11 |
| 2-1/2 | 244.3 | 41.1 | 124 | 63.5 | 75.4 | 7.9 | 8 | 28.4 | 1 | 190.5 | 16 |
| 3 | 266.7 | 47.8 | 133.4 | 73.2 | 91.4 | 9.7 | 8 | 31.8 | 1-1/8 | 203.2 | 21 |
| 4 | 311.2 | 53.8 | 162.1 | 90.4 | 116.8 | 11.2 | 8 | 35.1 | 1-1/4 | 241.3 | 34 |
| 5 | 374.7 | 73.2 | 196.9 | 104.6 | 144.5 | 11.2 | 8 | 41.1 | 1-1/2 | 292.1 | 64 |
| 6 | 393.7 | 82.6 | 228.6 | 119.1 | 171.5 | 12.7 | 12 | 38.1 | 1-3/8 | 317.5 | 77 |
| 8 | 482.6 | 91.9 | 292.1 | 142.7 | 222.3 | 12.7 | 12 | 44.5 | 1-5/8 | 393.7 | 129 |
| 10 | 584.2 | 108 | 368.3 | 177.8 | 277.4 | 12.7 | 12 | 50.8 | 1-7/8 | 482.6 | 220 |
| 12 | 673.1 | 124 | 450.9 | 218.9 | 328.2 | 12.7 | 16 | 53.8 | 2 | 571.5 | 286 |
| 14 | 749.3 | 133.4 | 495.3 | 241.3 | 360.2 | 12.7 | 16 | 60.5 | 2-1/4 | 635 | 404 |
| 16 | 825.5 | 146.1 | 552.5 | 260.4 | 411.2 | 12.7 | 16 | 66.5 | 2-1/2 | 704.9 | 476 |
| 18 | 914.4 | 162.1 | 596.9 | 276.4 | 462.3 | 12.7 | 16 | 73.2 | 2-3/4 | 774.7 | 669 |
| 20 | 984.3 | 177.8 | 641.4 | 292.1 | 514.4 | 12.7 | 16 | 79.2 | 3 | 831.9 | 805 |
| 24 | 1168.4 | 203.2 | 762 | 330.2 | 616 | 12.7 | 16 | 91.9 | 3-1/2 | 990.6 | 1281 |
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