All dimensions are in "mm" unless noted otherwise.
Dimensions of Class 300 RF Blind Flanges Series B 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 | 299.6 | 88.9 | 936.6 | 803.1 | 32 | 35.1 | 31.8 | 390 |
| 28 | 920.8 | 88.9 | 787.4 | 857.3 | 36 | 35.1 | 31.8 | 441 |
| 30 | 990.6 | 93.7 | 844.6 | 920.8 | 36 | 38.1 | 34.9 | 537 |
| 32 | 1054.1 | 103.1 | 901.7 | 977.9 | 32 | 41.1 | 38.1 | 673 |
| 34 | 1107.9 | 103.1 | 952.6 | 1031.7 | 36 | 41.1 | 38.1 | 743 |
| 36 | 1171.4 | 103.1 | 1009.7 | 1089.7 | 32 | 44.5 | 41.3 | 843 |
| 38 | 1222.2 | 111.3 | 1066.5 | 1140 | 36 | 44.5 | 41.3 | 978 |
| 40 | 1273 | 115.8 | 1114.6 | 1190.8 | 40 | 44.5 | 41.3 | 1104 |
| 42 | 1333.5 | 119.1 | 1168.4 | 1244.6 | 36 | 47.8 | 44.5 | 1249 |
| 44 | 1384.3 | 127 | 1219.2 | 1295.4 | 40 | 47.8 | 44.5 | 1433 |
| 46 | 1460.5 | 130 | 1270 | 1365.3 | 36 | 50.8 | 47.6 | 1641 |
| 48 | 1511.3 | 134.9 | 1327.2 | 1416.1 | 40 | 50.8 | 47.6 | 1819 |
| 50 | 1562.1 | 139.7 | 1378 | 1466.9 | 44 | 50.8 | 47.6 | 2011 |
| 52 | 1612.9 | 144.3 | 1428.8 | 1517.7 | 48 | 50.8 | 47.6 | 2212 |
| 54 | 1673.4 | 149.4 | 1479.6 | 1577.8 | 48 | 50.8 | 47.6 | 2473 |
| 56 | 1765.3 | 157 | 1536.7 | 1651 | 36 | 60.5 | 57.2 | 2899 |
| 58 | 1827.3 | 162.1 | 1593.9 | 1713 | 40 | 60.5 | 57.2 | 3184 |
| 60 | 1878 | 166.6 | 1651 | 1763.8 | 40 | 60.5 | 57.2 | 3486 |