Gasket Dimensions for Flat Ring and Full Face Applications
BS 10 Table T
| 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 | 3 1/8 | 79.4 | 5 1/2 | 139.7 | 7/8 | 22.2 | 4 | 101.6 | 4 | 1/2 |
| 3/4 | 1 1/16 | 27.0 | 3 1/8 | 79.4 | 5 1/2 | 139.7 | 7/8 | 22.2 | 4 | 101.6 | 4 | 3/4 |
| 1 | 1 11/32 | 34.1 | 3 3/8 | 85.7 | 5 3/4 | 146.1 | 7/8 | 22.2 | 4 1/4 | 108.0 | 4 | 1 |
| 1 1/4 | 1 11/16 | 42.9 | 3 3/4 | 95.3 | 6 1/4 | 158.8 | 1 | 25.4 | 4 3/4 | 120.7 | 4 | 1 1/4 |
| 1 1/2 | 1 29/32 | 48.4 | 4 3/8 | 111.1 | 6 3/4 | 171.5 | 7/8 | 22.2 | 5 1/4 | 133.4 | 8 | 1 1/2 |
| 2 | 2 3/8 | 60.3 | 4 7/8 | 123.8 | 7 1/4 | 184.2 | 7/8 | 22.2 | 5 3/4 | 146.1 | 8 | 2 |
| 2 1/2 | 3 | 76.2 | 5 1/2 | 139.7 | 8 | 203.2 | 1 | 25.4 | 6 1/2 | 165.1 | 8 | 2 1/2 |
| 3 | 3 1/2 | 88.9 | 6 3/8 | 161.9 | 9 1/4 | 235.0 | 1 1/8 | 28.6 | 7 1/2 | 190.5 | 8 | 3 |
| 3 1/2 | 4 | 101.6 | 7 1/4 | 184.2 | 10 1/2 | 266.7 | 1 1/4 | 31.8 | 8 1/2 | 215.9 | 8 | 3 1/2 |
| 4 | 4 1/2 | 114.3 | 8 | 203.2 | 11 1/4 | 285.8 | 1 1/4 | 31.8 | 9 1/4 | 235.0 | 8 | 4 |
| 4 1/2 | 5 | 127.0 | 8 7/8 | 225.4 | 11 3/4 | 1 1/8 | 28.6 | 10 | 254.0 | 12 | 4 1/2 | |
| 5 | 5 1/2 | 139.7 | 9 1/2 | 241.3 | 12 3/4 | 298.5 | 1 1/4 | 31.8 | 10 3/4 | 273.1 | 12 | 5 |
| 6 | 6 5/8 | 168.3 | 11 1/8 | 282.6 | 14 3/4 | 323.9 | 1 3/8 | 34.9 | 12 1/2 | 317.5 | 12 | 6 |
| 7 | 7 1/2 | 190.5 | 13 | 330.2 | 17 | 374.7 | 1 1/2 | 38.1 | 14 1/2 | 368.3 | 12 | 7 |
| 8 | 8 1/2 | 215.9 | 14 3/8 | 365.1 | 18 3/4 | 431.8 | 1 5/8 | 41.3 | 16 | 406.4 | 12 | 8 |
| 9 | 9 1/2 | 241.3 | 16 | 406.4 | 20 | 508.0 | 1 1/2 | 38.1 | 17 1/2 | 444.5 | 16 | 9 |
| 10 | 10 5/8 | 269.9 | 17 5/8 | 447.7 | 22 | 558.8 | 1 5/8 | 41.3 | 19 1/4 | 489.0 | 16 | 10 |
| 11 | 11 5/8 | 295.3 | 19 1/8 | 485.8 | 24 1/4 | 616.0 | 1 7/8 | 47.6 | 21 | 533.4 | 16 | 11 |
| 12 | 12 5/8 | 320.7 | 20 5/8 | 523.9 | 25 3/4 | 654.1 | 1 7/8 | 47.6 | 22 1/2 | 571.5 | 16 | 12 |
| 13 | 13 5/8 | 346.1 | 21 7/8 | 555.6 | 27 3/4 | 704.9 | 2 1/8 | 54.0 | 24 | 609.6 | 16 | 13 |
