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 | 890 | 111.3 | 727 | 806.4 | 28 | 44.5 | 528.79 |
| 28 | 950 | 115.9 | 784 | 863.6 | 28 | 47.6 | 626.51 |
| 30 | 1020 | 127.0 | 841 | 927.1 | 28 | 50.8 | 789.17 |
| 32 | 1085 | 134.9 | 895 | 984.2 | 28 | 54.0 | 946.54 |
| 34 | 1160 | 144.2 | 953 | 1054.1 | 24 | 60.3 | 1158.72 |
| 36 | 1215 | 150.9 | 1010 | 1104.9 | 28 | 60.3 | 1323.63 |