Gasket dimensions for flat ring and full face applications
BS 10 table K
| 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 | 13 7/8 | 352.4 | 17 | 431.8 | 1 1/8 | 28.6 | 15 | 381.0 | 16 | 10 |
| 12 | 12 5/8 | 320.7 | 15 3/4 | 400.1 | 19 1/4 | 489.0 | 1 1/8 | 28.6 | 17 | 431.8 | 16 | 12 |
| 13 | 13 5/8 | 346.1 | 17 5/8 | 447.7 | 21 1/2 | 546.1 | 1 3/8 | 34.9 | 19 | 482.6 | 16 | 13 |
| 14 | 14 5/8 | 371.5 | 18 5/8 | 473.1 | 22 1/2 | 571.5 | 1 3/8 | 34.9 | 20 | 508.0 | 16 | 14 |
| 15 | 15 5/8 | 396.9 | 19 7/8 | 504.8 | 23 3/4 | 603.3 | 1 3/8 | 34.9 | 21 1/4 | 539.8 | 20 | 15 |
| 16 | – | – | – | – | – | – | – | – | – | – | – | 16 |
| 17 | – | – | – | – | – | – | – | – | – | – | – | 17 |
| 18 | – | – | – | – | – | – | – | – | – | – | – | 18 |
| 19 | – | – | – | – | – | – | – | – | – | – | – | 19 |
| 20 | – | – | – | – | – | – | – | – | – | – | – | 20 |
| 21 | – | – | – | – | – | – | – | – | – | – | – | 21 |
| 22 | – | – | – | – | – | – | – | – | – | – | – | 22 |
| 23 | – | – | – | – | – | – | – | – | – | – | – | 23 |
| 24 | – | – | – | – | – | – | – | – | – | – | – | 24 |
