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 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