Lap Joint Flanges
Class 2500
| Nominal size | O | C | X | Y | B | R | No. of holes | Diam. of holes | Diam. of bolts | Diam. of bolt circle | Approx. weight pounds Kg | |
| O | C | X | Y | B | r | |||||||
| in. | 1/2″ | 5.25 | 1.19 | 1.69 | 1.56 | 0.9 | 0.12 | 4 | 0.88 | 3/4″ | 3.5 | 7 |
| mm. | 133.4 | 30.2 | 42.9 | 39.6 | 22.9 | 3 | 22.4 | 19.1 | 88.9 | 3 | ||
| in. | 3/4″ | 5.5 | 1.25 | 2 | 1.69 | 1.11 | 0.12 | 4 | 0.88 | 3/4″ | 3.75 | 8 |
| mm. | 139.7 | 31.8 | 50.8 | 42.9 | 28.2 | 3 | 22.4 | 19.1 | 95.3 | 4 | ||
| in. | 1″ | 6.25 | 1.38 | 2.25 | 1.88 | 1.38 | 0.12 | 4 | 1 | 7/8″ | 4.25 | 11 |
| mm. | 158.8 | 35.1 | 57.2 | 47.8 | 35.1 | 3 | 25.4 | 22.2 | 108 | 5 | ||
| in. | 1 1/4″ | 7.25 | 1.5 | 2.88 | 2.06 | 1.72 | 0.19 | 4 | 1.12 | 1″ | 5.12 | 16 |
| mm. | 184.2 | 38.1 | 73.2 | 52.3 | 43.7 | 4.8 | 28.4 | 25.4 | 130 | 7 | ||
| in. | 1 1/2″ | 8 | 1.75 | 3.12 | 2.38 | 1.97 | 0.25 | 4 | 1.25 | 1 1/8″ | 5.75 | 22 |
| mm. | 203.2 | 44.5 | 79.2 | 60.5 | 50 | 6.4 | 31.8 | 28.6 | 146.1 | 10 | ||
| in. | 2″ | 9.25 | 2 | 3.75 | 2.75 | 2.46 | 0.31 | 8 | 1.12 | 1″ | 6.75 | 37 |
| mm. | 235 | 50.8 | 95.3 | 69.9 | 62.5 | 7.9 | 28.4 | 25.4 | 171.5 | 17 | ||
| in. | 2 1/2″ | 10.5 | 2.25 | 4.5 | 3.12 | 2.97 | 0.31 | 8 | 1.25 | 1 1/8″ | 7.75 | 53 |
| mm. | 266.7 | 57.2 | 114.3 | 79.2 | 75.4 | 7.9 | 31.8 | 28.6 | 196.9 | 24 | ||
| in. | 3″ | 12 | 2.62 | 5.25 | 3.62 | 3.6 | 0.38 | 8 | 1.38 | 1 1/4″ | 9 | 80 |
| mm. | 304.8 | 66.5 | 133.4 | 91.9 | 91.4 | 9.7 | 35.1 | 31.8 | 228.6 | 36 | ||
| in. | 4″ | 14 | 3 | 6.5 | 4.25 | 4.6 | 0.44 | 8 | 1.62 | 1 1/2″ | 10.75 | 120 |
| mm. | 355.6 | 76.2 | 165.1 | 108 | 116.8 | 11.2 | 41.1 | 38.1 | 273.1 | 54 | ||
| in. | 5″ | 16.5 | 3.62 | 8 | 5.12 | 5.69 | 0.44 | 8 | 1.88 | 1 3/4″ | 12.75 | 205 |
| mm. | 419.1 | 91.9 | 203.2 | 130 | 144.5 | 11.2 | 47.8 | 44.5 | 323.9 | 93 | ||
| in. | 6″ | 19 | 4.25 | 9.25 | 6 | 6.75 | 0.5 | 8 | 2.12 | 2″ | 14.5 | 315 |
| mm. | 482.6 | 108 | 235 | 152.4 | 171.5 | 12.7 | 53.8 | 50.8 | 368.3 | 143 | ||
| in. | 8″ | 21.75 | 5 | 12 | 7 | 8.75 | 0.5 | 12 | 2.12 | 2″ | 17.25 | 470 |
| mm. | 552.5 | 127 | 304.8 | 177.8 | 222.3 | 12.7 | 53.8 | 50.8 | 438.2 | 213 | ||
| in. | 10″ | 26.5 | 6.5 | 14.75 | 9 | 10.92 | 0.5 | 12 | 2.62 | 2 1/2″ | 21.25 | 900 |
| mm. | 673.1 | 165.1 | 374.7 | 228.6 | 277.4 | 12.7 | 66.5 | 63.5 | 539.8 | 408 | ||
| in. | 12″ | 30 | 7.25 | 17.38 | 10 | 12.92 | 0.5 | 12 | 2.88 | 2 3/4″ | 24.38 | 1100 |
| mm. | 762 | 184.2 | 441.5 | 254 | 328.2 | 12.7 | 73.2 | 69.9 | 619.3 | 499 |