| Drilling | Ring Type Joint | |||||||||||||||||
| Nom Size | OD | Thickness | OD of RF | Dia at Base | Dia Bevel | LTH | Dia of Pressure Connection | Bolt Circle | Hole Dia | # of holes | Bolt Dia | Grove # | Pitch Dia | Groove Depth | Groove width | Rad at Bottom | Spec Oval RH | |
| O | C | R | X | A | Y | TT | P | E | F | r max | W | |||||||
| in | 4 | 10 | 1.5 | 6.19 | 5.75 | 4.5 | 3.5 | 1/2 | 7.88 | 1 | 8 | 7/8 | R37 | 5.875 | 0.312 | 0.469 | 0.03 | 1.06 |
| mm | 254 | 38.1 | 157 | 146 | 114.3 | 88.9 | 12.7 | 200.2 | 25.4 | 22.2 | 149.225 | 7.925 | 11.913 | 0.8 | 26.9 | |||
| in | 6 | 12.5 | 1.62 | 8.5 | 8.12 | 6.63 | 4.06 | 1/2 | 10.62 | 1 | 12 | 7/8 | R45 | 8.312 | 0.312 | 0.469 | 0.03 | 1.06 |
| mm | 317.5 | 41.1 | 216 | 206 | 168.4 | 103 | 12.7 | 269.7 | 25.4 | 22.2 | 211.125 | 7.925 | 11.913 | 0.8 | 26.9 | |||
| in | 8 | 15 | 1.88 | 10.62 | 10.25 | 8.63 | 4.62 | 1/2 | 13 | 1.12 | 12 | 1 | R49 | 10.625 | 0.312 | 0.469 | 0.03 | 1.06 |
| mm | 381 | 47.8 | 270 | 260 | 219.2 | 117 | 12.7 | 330.2 | 28.4 | 25.4 | 269.875 | 7.925 | 11.913 | 0.8 | 26.9 | |||
| in | 10 | 17.5 | 2.12 | 12.75 | 12.62 | 10.75 | 4.88 | 1/2 | 15.25 | 1.25 | 16 | 1 1/8 | R53 | 12.75 | 0.312 | 0.469 | 0.03 | 1.06 |
| mm | 444.5 | 53.8 | 324 | 321 | 273.1 | 124 | 12.7 | 387.4 | 31.8 | 28.6 | 323.850 | 7.925 | 11.913 | 0.8 | 26.9 | |||
| in | 12 | 20.5 | 2.25 | 15 | 14.75 | 12.75 | 5.38 | 1/2 | 17.75 | 1.38 | 16 | 1 1/4 | R57 | 15 | 0.312 | 0.469 | 0.03 | 1.06 |
| mm | 520.7 | 57.2 | 381 | 375 | 323.9 | 137 | 12.7 | 450.9 | 35.1 | 31.8 | 381.000 | 7.925 | 11.913 | 0.8 | 26.9 | |||
| in | 14 | 23 | 2.39 | 16.25 | 16.75 | 14 | 5.88 | 1/2 | 20.25 | 1.38 | 20 | 1 1/4 | R61 | 16.5 | 0.312 | 0.469 | 0.03 | 1.06 |
| mm | 584.2 | 60.7 | 413 | 426 | 355.6 | 149 | 12.7 | 514.4 | 35.1 | 31.8 | 419.100 | 7.925 | 11.913 | 0.8 | 26.9 | |||
| in | 16 | 25.5 | 2.5 | 18.5 | 19 | 16 | 6 | 1/2 | 22.5 | 1.5 | 20 | 1 3/8 | R65 | 18.5 | 0.312 | 0.469 | 0.03 | 1.19 |
| mm | 647.7 | 63.5 | 470 | 483 | 406.4 | 152 | 12.7 | 571.5 | 38.1 | 34.9 | 469.900 | 7.925 | 11.913 | 0.8 | 30.2 | |||
| in | 18 | 28 | 2.62 | 21 | 21 | 18 | 6.5 | 1/2 | 24.75 | 1.5 | 24 | 1 3/8 | R69 | 21 | 0.312 | 0.469 | 0.03 | 1.19 |
| mm | 711.2 | 66.5 | 533 | 533 | 457.2 | 165 | 12.7 | 628.7 | 38.1 | 34.9 | 533.400 | 7.925 | 11.913 | 0.8 | 30.2 | |||
| in | 20 | 30.5 | 2.75 | 23 | 23.12 | 20 | 6.62 | 1/2 | 27 | 1.62 | 24 | 1 1/2 | R73 | 23 | 0.375 | 0.531 | 0.06 | 1.25 |
| mm | 774.7 | 69.9 | 584 | 587 | 508 | 168 | 12.7 | 685.8 | 41.1 | 38.1 | 584.200 | 9.525 | 13.487 | 1.5 | 31.8 | |||
| in | 24 | 36 | 3 | 27.25 | 27.62 | 24 | 6.88 | 1/2 | 32 | 1.89 | 24 | 1 3/4 | ||||||
| mm | 914.4 | 76.2 | 692.2 | 702 | 609.6 | 174.8 | 12.7 | 812.8 | 48 | 44.5 |
Note: Weld neck flanges NPS 3″ and smaller are identical to Class 600 flanges and may be so marked.
(1) Bore diameter to be specified by purchaser
(2) Other NPT and SW connections available upon request.
Welding Neck Orifice Class 400 Flange PDF (for printing).
