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Dimension of Class 1500 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 | 120.6 | 22.2 | 34.9 | 38.1 | 60.3 | 31.7 | 31.7 | 21.3 |  |
22.30 | 82.5 | 4 | 22.2 | 9.6 | 22.3 |
| ¾ | 130.2 | 25.4 | 42.9 | 44.4 | 69.8 | 34.9 | 34.9 | 26.7 | 27.70 | 88.9 | 4 | 22.2 | 11.1 | 25.4 | |
| 1 | 149.2 | 28.6 | 50.8 | 52.3 | 73.0 | 41.3 | 41.3 | 33.5 | 34.54 | 101.6 | 4 | 25.4 | 12.7 | 28.7 | |
| 1¼ | 158.7 | 28.6 | 63.5 | 63.5 | 73.0 | 41.3 | 41.3 | 42.2 | 43.20 | 111.1 | 4 | 25.4 | 14.3 | 30.2 | |
| 1½ | 177.8 | 31.7 | 73.0 | 69.8 | 82.5 | 44.4 | 44.4 | 48.3 | 49.50 | 123.8 | 4 | 28.6 | 15.9 | 31.7 | |
| 2 | 215.9 | 38.1 | 92.1 | 104.6 | 101.6 | 57.2 | 57.2 | 60.4 | 62.00 | 165.1 | 8 | 25.4 | 17.5 | 38.1 | |
| 2½ | 244.5 | 41.3 | 104.8 | 123.9 | 104.8 | 63.5 | 63.5 | 73.1 | 74.70 | 190.5 | 28.6 | 19.0 | 47.7 | ||
| 3 | 267.7 | 47.6 | 127.0 | 133.3 | 117.4 | 73.0 | 73.0 | 88.9 | 90.70 | 203.2 | 8 | 31.7 | 50.8 | ||
| 4 | 311.1 | 54.0 | 157,2 | 162.0 | 123.8 | 90.5 | 90.5 | 114.3 | 103.50 | 241.3 | 8 | 34.9 | 57.1 | ||
| 5 | 374.6 | 73.0 | 185.7 | 196.8 | 155.5 | 104.8 | 104.8 | 141.2 | 116.00 | 292.1 | 8 | 41.3 | - | 63.5 | |
| 6 | 393.7 | 82.5 | 215.9 | 228.6 | 171.4 | 119.1 | 119.1 | 168.4 | 143.80 | 317.5 | 12 | 38.1 | - | 69.8 | |
| 8 | 482.6 | 92.1 | 269.9 | 292.1 | 212.7 | 142.8 | 142.8 | 219.2 | 170.50 | 393.7 | 12 | 44.4 | - | 76.2 | |
| 10 | 584.2 | 107.9 | 323,8 | 368.3 | 254.0 | 158.7 | 177.8 | 273.0 | 221.50 | 482.6 | 12 | 50.8 | 84.0 | ||
| 12 | 673.1 | 123.8 | 381.0 , | 450.8 | 282.5 | 180.9 | 219.1 | 323.8 | 276.40 | 571.5 | 16 | 54.0 | - | 92.2 | |
| 14 | 749.3 | 133.3 | 412.7 | 495.3 | 298.4 | 241.3 | 356.6 | - | 635.0 | 16 | 60.3 | - | |||
| 16 | 825.5 | 146.1 | 469.9 | 552.4 | 311.1 | - | 260.3 | 406.4 | - | 704.8 | 16 | 66.7 | - | - | |
| 18 | 914.4 | 161.9 | 533.4 | 596.9 | 327.0 | - | 276.2 | 457.2 | - | 774.7 | 16 | 73.0 | - | - | |
| 20 | 984.2 | 177.8 | 584.2 | 641.3 | 355.6 | - | 292.1 | 508.0 | - | 831.8 | 16 | 79.4 | - | - | |
| 24 | 1168.4 | 203.2 | 692.1 | 762.0 | 406.4 | - | 330.2 | 609.6 | - | 990.6 | 16 | 92.1 | - | - |