Dimensions of Type 6B flanges for 5000 psi (34.5 MPa) rated working pressure.
Type 6B flanges are of the ring joint type and are not designed for face-to-face make-up. The connection make-up bolting force reacts on the metallic ring gasket.
All dimensions are in "mm" unless noted otherwise. Only flange sizes are in imperial units.
| Size | B1 | O | C | K | P | E | X | BC | N | H | Y | A | B2 | Ring Number R or RX |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 1/16" | 53.2 | 215 | 46.1 | 124 | 95.25 | 7.9 | 104.8 | 165.1 | 8 | 26 | 109.6 | 60.3 | 43.7 | 24 |
| 2 9/16" | 65.9 | 245 | 49.3 | 137 | 107.95 | 7.9 | 123.8 | 190.5 | 8 | 29 | 112.7 | 73.0 | 54.9 | 27 |
| 3 1/8" | 81.8 | 265 | 55.6 | 168 | 136.53 | 7.9 | 133.3 | 203.2 | 8 | 32 | 125.4 | 88.9 | 67.5 | 35 |
| 4 1/16" | 108.7 | 310 | 62.0 | 194 | 161.93 | 7.9 | 161.9 | 241.3 | 8 | 35 | 131.8 | 114.3 | 88.1 | 39 |
| 5 1/8" | 131.0 | 375 | 81.0 | 229 | 193.68 | 7.9 | 196.8 | 292.1 | 8 | 42 | 163.5 | 141.3 | 110.3 | 44 |
| 7 1/16" | 181.0 | 395 | 92.1 | 248 | 211.15 | 9.7 | 228.6 | 317.5 | 12 | 39 | 181 | 168.3 | 132.6 | 46 |
| 9" | 229.4 | 485 | 103.2 | 318 | 269.88 | 11.2 | 292.1 | 393.7 | 12 | 45 | 223.8 | 219.1 | 173.8 | 50 |
| 11" | 280.2 | 585 | 119.1 | 371 | 323.85 | 11.2 | 368.3 | 482.6 | 12 | 51 | 265.1 | 273 | 216.7 | 54 |