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Dimension of Class 600 Flanges As Per ANSI B 16.5
| Size | D O.D |
B Thk |
G R.F Dia |
M Hub O.D |
H1 W/N |
H2 Sorf |
H3 Lap Joint |
A Neck O.D |
B1 Wnrf ID |
B2 ID SW Lap/Sorf |
K PCD |
N No of Holes |
O Hole |
DEP P |
Thread T |
| ½ | 95.2 | 14.3 | 34.9 | 38.1 | 52.4 | 22.2 | 22.2 | 21.3 |  |
22.30 | 66.7 | 4 | 15.9 | 9.6 | 15.7 |
| ¾ | 117.5 | 15.9 | 42.9 | 47.6 | 57.1 | 25.4 | 25.4 | 26.7 | 27.70 | 82.5 | 4 | 19.0 | 11.1 | 15.7 | |
| 1 | 123.8 | 17.5 | 50.8 | 54.0 | 61.9 | 26.9 | 26.9 | 33.5 | 34.54 | 88.9 | 4 | 19.0 | 12.7 | 17.5 | |
| 1¼ | 133.3 | 20.6 | 63.5 | 63.5 | 66.7 | 28.6 | 28.6 | 42.2 | 43.20 | 98.4 | 4 | 19.0 | 14.3 | 20.6 | |
| 1½ | 155.6 | 22.4 | 73.0 | 69.8 | 69.8 | 31.7 | 31.7 | 48.3 | 49.50 | 114.3 | 4 | 22.2 | 15.9 | 22.4 | |
| 2 | 165.1 | 25.4 | 92.1 | 84.1 | 73.0 | 36.5 | 36.5 | 60.4 | 62.00 | 127.0 | 8 | 19.0 | 17.5 | 28.4 | |
| 2½ | 190.5 | 28.6 | 104.8 | 100.0 | 79.4 | 41.3 | 41.3 | 73.1 | 74.70 | 149.2 | 8 | 22.2 | 19.0 | 31.8 | |
| 3 | 209.5 | 31.8 | 127.0 | 117.5 | 82.5 | 46.0 | 46.0 | 88.9 | 90.70 | 168.3 | 8 | 22.2 | 20.6 | 35.1 | |
| 3½ | 228.5 | 34.9 | 139.7 | 133.4 | 85.7 | 49.2 | 49.2 | 101.6 | 103.50 | 184.1 | 8 | 25.4 | - | 39.6 | |
| 4 | 273.5 | 38.1 | 157.2 | 152.4 | 101.6 | 53.9 | 53.9 | 114.3 | 116.00 | 215.9 | 8 | 25.4 | - | 41.1 | |
| 5 | 330.2 | 44.5 | 185.7 | 188.9 | 114.3 | 60.3 | 60.3 | 141.2 | 143.80 | 266.7 | 8 | 28.6 | - | 47.8 | |
| 6 | 355.6 | 47.8 | 215.9 | 222.3 | 117.5 | 66.7 | 66.7 | 168.4 | 170.50 | 292.1 | 12 | 28.6 | - | 50.8 | |
| 8 | 419.1 | 55.6 | 269.9 | 273.1 | 133.3 | 76.2 | 76.2 | 219.2 | 221.50 | 349.2 | 12 | 31.7 | - | 57.2 | |
| 10 | 508.0 | 63.5 | 323.8 | 342.9 | 152.4 | 85.7 | 111.1 | 273.0 | 276.40 | 431.8 | 16 | 34.9 | - | 65.0 | |
| 12 | 558.0 | 66.5 | 381.0 | 400.0 | 155.6 | 92.1 | 117.5 | 323.8 | 327.20 | 488.9 | 20 | 34.9 | - | 69.9 | |
| 14 | 603.2 | 69.9 | 412.7 | 431.8 | 165.1 | 93.7 | 127.0 | 355.6 | 359.20 | 527.0 | 20 | 38.1 | - | 73.2 | |
| 16 | 685.8 | 76.2 | 469.9 | 495.3 | 177.8 | 106.4 | 139.7 | 406.4 | 410.50 | 603.2 | 20 | 41.3 | - | 77.7 | |
| 18 | 742.9 | 82.6 | 533.4 | 546.1 | 184.2 | 117.5 | 152.4 | 457.2 | 461.80 | 654.0 | 20 | 44.4 | - | 79.2 | |
| 20 | 812.8 | 88.9 | 584.2 | 609.6 | 190.5 | 127.0 | 165.1 | 508.0 | 513.10 | 723.9 | 24 | 44.4 | - | 82.6 | |
| 22 | 870.0 | 95.2 | 641.3 | 666.7 | 196.8 | 133.3 | 174.6 | 558.8 | 564.40 | 777.9 | 24 | 47.6 | - | 91.9 | |
| 24 | 939.8 | 101.6 | 692.1 | 717.5 | 203.2 | 139.7 | 184.1 | 609.6 | 616.00 | 838.2 | 24 | 50.8 | - | - | |
| 26 | 1016.0 | 107.9 | 749.3 | 747.8 | 222.2 | 222.2 | - | 660.4 | - | 914.4 | 28 | 50.8 | - | - | |
| 28 | 1073.1 | 111.1 | 800.1 | 803.1 | 234.9 | 234.9 | - | 711.2 | - | 965.2 | 28 | 50.8 | - | - | |
| 30 | 1130.3 | 114.3 | 857.2 | 862.1 | 247.6 | 247.6 | - | 762.0 | - | 1022.3 | 28 | 50.8 | - | - | |
| 32 | 1193.8 | 117.5 | 914.4 | 917.4 | 260.3 | 260.3 | - | 812.8 | - | 1079.5 | 28 | 60.3 | - | - | |
| 34 | 1244.6 | 120.6 | 965.2 | 970.0 | 269.9 | 269.9 | - | 863.6 | - | 1130.3 | 28 | 60.3 | - | - | |
| 36 | 1314.4 | 123.8 | 1022.3 | 1032.0 | 282.6 | 282.6 | - | 914.4 | - | 1193.8 | 28 | 66.7 | - | - | |
| 42 | 1492.2 | 139.7 | 1193.8 | 1127.0 | 279.4 | 279.4 | - | 1067.0 | - | 1365.2 | 28 | 73.0 | - | - |