Dimensions of Type 6B flanges for 2000 psi (13.8 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 | 165 | 33.4 | 108 | 82.55 | 7.9 | 84 | 127 | 8 | 20 | 81 | 60.3 | 53.3 | 23 |
| 2 9/16" | 65.9 | 190 | 36.6 | 127 | 101.60 | 7.9 | 100 | 149.2 | 8 | 23 | 88 | 73.0 | 63.5 | 26 |
| 3 1/8" | 81.8 | 210 | 39.7 | 146 | 123.83 | 7.9 | 117 | 168.3 | 8 | 23 | 91 | 88.9 | 78.7 | 31 |
| 4 1/16" | 108.7 | 275 | 46.1 | 175 | 149.23 | 7.9 | 152 | 215.9 | 8 | 26 | 110 | 114.3 | 103.1 | 37 |
| 5 1/8" | 131.0 | 330 | 52.4 | 210 | 180.98 | 7.9 | 189 | 266.7 | 8 | 29 | 122 | 141.3 | 122.9 | 41 |
| 7 1/16" | 181.0 | 355 | 55.6 | 241 | 211.15 | 7.9 | 222 | 292.1 | 12 | 29 | 126 | 168.3 | 147.1 | 45 |
| 9" | 229.4 | 420 | 63.5 | 302 | 269.88 | 7.9 | 273 | 349.3 | 12 | 32 | 141 | 219.1 | 199.1 | 49 |
| 11" | 280.2 | 510 | 71.5 | 356 | 323.85 | 7.9 | 343 | 431.8 | 16 | 35 | 160 | 273.0 | 248.4 | 53 |
| 13 5/8 " | 346.9 | 560 | 74.7 | 413 | 381.00 | 7.9 | 400 | 489 | 20 | 35 | - | - | - | 57 |
| 16 3/4" | 426.2 | 685 | 84.2 | 508 | 469.90 | 7.9 | 495 | 603.2 | 20 | 42 | - | - | - | 65 |
| 21 1/4" | 540.5 | 815 | 98.5 | 635 | 584.20 | 9.7 | 610 | 723.9 | 24 | 45 | - | - | - | 73 |