All dimensions are in "mm" unless noted otherwise.
Dimensions of Class 150 RF Blind Flanges Series A as per ASME B16.47.
| Nominal Pipe Size |
OD of Flange (O) |
Thickness of Flange (C) |
Dia of Raised Face (R) |
Dia of Bolt Circle (B) |
No of Bolt Holes |
Dia of Bolt Holes |
Dia of Bolt |
Approx Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 26 | 870 | 68.3 | 749.3 | 806.5 | 24 | 35.1 | 31.8 | 306 |
| 28 | 927.1 | 71.4 | 800.1 | 863.6 | 28 | 35.1 | 31.8 | 363 |
| 30 | 984.30 | 74.70 | 857.3 | 914.4 | 28 | 35.1 | 31.8 | 431 |
| 32 | 1060.5 | 81 | 914.4 | 977.9 | 28 | 41.1 | 38.1 | 539 |
| 34 | 1111.3 | 82.6 | 965.2 | 1028.7 | 32 | 41.1 | 38.1 | 602 |
| 36 | 1168.4 | 90.4 | 1022.4 | 1085.9 | 32 | 41.1 | 38.1 | 733 |
| 38 | 1238.3 | 87.4 | 1073.2 | 1149.4 | 32 | 41.1 | 38.1 | 798 |
| 40 | 1289 | 90.4 | 1124 | 1200.2 | 36 | 41.1 | 38.1 | 895 |
| 42 | 1346.2 | 96.8 | 1193.8 | 1257.3 | 36 | 41.1 | 38.1 | 1048 |
| 44 | 1403.4 | 101.6 | 1244.6 | 1314.5 | 40 | 41.1 | 38.1 | 1195 |
| 46 | 1454.2 | 103.1 | 1295.4 | 1365.3 | 40 | 41.1 | 38.1 | 1306 |
| 48 | 1511.3 | 108 | 1358.9 | 1422.4 | 44 | 41.1 | 38.1 | 1476 |
| 50 | 1568.5 | 111.3 | 1409.7 | 1479.6 | 44 | 47.8 | 44.5 | 1625 |
| 52 | 1625.6 | 115.8 | 1460.5 | 1530.4 | 44 | 47.8 | 44.5 | 1823 |
| 54 | 1682.8 | 120.7 | 1511.3 | 1593.9 | 44 | 47.8 | 44.5 | 2040 |
| 56 | 1746.3 | 124 | 1574.8 | 1651 | 48 | 47.8 | 44.5 | 2256 |
| 58 | 1803.4 | 128.5 | 1625.6 | 1708.2 | 48 | 47.8 | 44.5 | 2501 |
| 60 | 1854.2 | 131.8 | 1676.4 | 1759 | 52 | 47.8 | 44.5 | 2710 |