Gasket dimensions for flat ring and full face applications
BS 10 table R
| Nominal pipe size | Gasket ID | IBC gasket OD | Full face | Nominal pipe size | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Full face gasket OD | Diameter of bolt holes | Bolt P.C.D. | Number of bolt holes | |||||||||
| Inches | mm | Inches | mm | Inches | mm | Inches | mm | Inches | mm | |||
| 1/2 | 27/32 | 21.4 | 2 9/16 | 65.1 | 4 1/2 | 114.3 | 11/16 | 17.5 | 3 1/4 | 82.6 | 4 | 1/2 |
| 3/4 | 1 1/16 | 27.0 | 2 9/16 | 65.1 | 4 1/2 | 114.3 | 11/16 | 17.5 | 3 1/4 | 82.6 | 4 | 3/4 |
| 1 | 1 11/32 | 34.1 | 3 1/16 | 77.8 | 5 | 127.0 | 11/16 | 17.5 | 3 3/4 | 95.3 | 4 | 1 |
| 1 1/4 | 1 11/16 | 42.9 | 3 3/16 | 81.0 | 5 1/4 | 133.4 | 11/16 | 17.5 | 3 7/8 | 98.4 | 4 | 1 1/4 |
| 1 1/2 | 1 29/32 | 48.4 | 3 5/8 | 92.1 | 6 | 152.4 | 7/8 | 22.2 | 4 1/2 | 114.3 | 4 | 1 1/2 |
| 2 | 2 3/8 | 60.3 | 4 5/16 | 109.5 | 6 1/2 | 165.1 | 11/16 | 17.5 | 5 | 127.0 | 8 | 2 |
| 2 1/2 | 3 | 76.2 | 4 7/8 | 123.8 | 7 1/4 | 184.2 | 7/8 | 22.2 | 5 3/4 | 146.1 | 8 | 2 1/2 |
| 3 | 3 1/2 | 88.9 | 5 5/8 | 142.9 | 8 | 203.2 | 7/8 | 22.2 | 6 1/2 | 165.1 | 8 | 3 |
| 3 1/2 | 4 | 101.6 | 6 1/4 | 158.8 | 9 | 228.6 | 1 | 25.4 | 7 1/4 | 184.2 | 8 | 3 1/2 |
| 4 | 4 1/2 | 114.3 | 6 3/4 | 171.5 | 9 1/2 | 241.3 | 1 | 25.4 | 7 3/4 | 196.9 | 8 | 4 |
| 5 | 5 1/2 | 139.7 | 8 1/4 | 209.6 | 11 | 279.4 | 1 | 25.4 | 9 1/4 | 235.0 | 12 | 5 |
| 6 | 6 5/8 | 168.3 | 9 1/4 | 235.0 | 12 | 304.8 | 1 | 25.4 | 10 1/4 | 260.4 | 12 | 6 |
| 7 | 7 1/2 | 190.5 | 10 3/8 | 263.5 | 13 1/2 | 342.9 | 1 1/8 | 28.6 | 11 1/2 | 292.1 | 12 | 7 |
| 8 | 8 1/2 | 215.9 | 11 3/8 | 288.9 | 14 1/2 | 368.3 | 1 1/8 | 28.6 | 12 1/2 | 317.5 | 12 | 8 |
| 9 | 9 1/2 | 241.3 | 12 7/8 | 327.0 | 16 | 406.4 | 1 1/8 | 28.6 | 14 | 355.6 | 16 | 9 |
| 10 | 10 5/8 | 269.9 | 14 1/8 | 358.8 | 17 | 431.8 | 1 1/8 | 28.6 | 15 1/4 | 387.4 | 16 | 10 |
| 12 | 12 5/8 | 320.7 | 16 3/4 | 425.5 | 19 1/4 | 489.0 | 1 1/4 | 31.8 | 18 | 457.2 | 16 | 12 |
| 13 | 13 5/8 | 346.1 | 18 1/8 | 460.4 | 21 1/2 | 546.1 | 1 3/8 | 34.9 | 19 1/2 | 495.3 | 16 | 13 |
| 14 | 14 5/8 | 371.5 | 19 3/8 | 492.1 | 23 | 584.2 | 1 3/8 | 34.9 | 20 3/4 | 527.1 | 16 | 14 |
| 15 | 15 5/8 | 396.9 | 20 3/8 | 517.5 | 24 | 609.6 | 1 3/8 | 34.9 | 21 3/4 | 552.5 | 20 | 15 |
| 16 | 17 | 431.8 | 21 5/8 | 549.3 | 25 1/4 | 641.4 | 1 3/8 | 34.9 | 23 | 584.2 | 20 | 16 |
| 17 | 18 | 457.2 | 22 5/8 | 574.7 | 26 1/2 | 673.1 | 1 3/8 | 34.9 | 24 | 609.6 | 20 | 17 |
| 18 | 19 | 482.6 | 25 | 635.0 | 29 | 736.6 | 1 1/2 | 38.1 | 26 1/2 | 673.1 | 20 | 18 |
| 20 | 21 | 533.4 | 27 1/8 | 689.0 | 31 3/4 | 806.5 | 1 5/8 | 41.3 | 28 3/4 | 730.3 | 20 | 20 |
| 22 | 23 | 584.2 | 29 5/8 | 752.5 | 35 1/4 | 895.4 | 2 1/8 | 54.0 | 31 3/4 | 806.5 | 20 | 22 |
