Pipe flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification.
| Norminal Pipe Size | O.D.of Flange, O | Min.Thick-ness of BL Flange, tf | Raised Fase Diam., R | Diam of Bolt Circle | No.of Bolt Holes | Diam.of Bolt Hole | Approxi-mate Weight kgs |
| 26 | 1020 | 154.0 | 762 | 901.7 | 20 | 66.7 | 929.16 |
| 28 | 1105 | 166.7 | 819 | 971.6 | 20 | 73.0 | 1175.15 |
| 30 | 1180 | 176.1 | 876 | 1035.0 | 20 | 79.4 | 1409.12 |
| 32 | 1240 | 186.0 | 927 | 1092.2 | 20 | 79.4 | 1657.09 |
| 34 | 1315 | 195.0 | 991 | 1155.7 | 20 | 85.7 | 1946.10 |
| 36 | 1345 | 201.7 | 1029 | 1200.2 | 24 | 79.4 | 2108.86 |