Gasket Dimensions for Flat Ring and Full Face Applications
BS 10 Table H
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 |
2 3/4 |
69.9 |
4 3/4 |
120.7 |
11/16 |
17.5 |
3 7/16 |
87.3 |
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 7/16 |
87.3 |
5 1/2 |
139.7 |
11/16 |
17.5 |
4 1/8 |
104.8 |
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 |
4 |
2 |
2 1/2 |
3 |
76.2 |
5 1/16 |
128.6 |
7 1/4 |
184.2 |
11/16 |
17.5 |
5 3/4 |
146.1 |
8 |
2 1/2 |
3 |
3 1/2 |
88.9 |
5 13/16 |
147.6 |
8 |
203.2 |
11/16 |
17.5 |
6 1/2 |
165.1 |
8 |
3 |
3 1/2 |
4 |
101.6 |
6 5/16 |
160.3 |
8 1/2 |
215.9 |
11/16 |
17.5 |
7 |
177.8 |
8 |
3 1/2 |
4 |
4 1/2 |
114.3 |
6 13/16 |
173.0 |
9 |
228.6 |
11/16 |
17.5 |
7 1/2 |
190.5 |
8 |
4 |
5 |
5 1/2 |
139.7 |
8 3/8 |
212.7 |
11 |
279.4 |
7/8 |
22.2 |
9 1/4 |
235.0 |
8 |
5 |
6 |
6 5/8 |
168.3 |
9 3/8 |
238.1 |
12 |
304.8 |
7/8 |
22.2 |
10 1/4 |
260.4 |
12 |
6 |
7 |
7 5/8 |
193.7 |
10 5/8 |
269.9 |
13 1/4 |
336.6 |
7/8 |
22.2 |
11 1/2 |
292.1 |
12 |
7 |
8 |
8 5/8 |
219.1 |
11 7/8 |
301.6 |
14 1/2 |
368.3 |
7/8 |
22.2 |
12 3/4 |
323.9 |
12 |
8 |
9 |
9 5/8 |
244.5 |
13 |
330.2 |
16 |
406.4 |
1 |
25.4 |
14 |
355.6 |
12 |
9 |
10 |
10 3/4 |
273.1 |
14 |
355.6 |
17 |
431.8 |
1 |
25.4 |
15 |
381.0 |
12 |
10 |
12 |
12 3/4 |
323.9 |
16 1/4 |
412.8 |
19 1/4 |
489.0 |
1 |
25.4 |
17 1/4 |
438.2 |
16 |
12 |
13 |
14 |
355.6 |
17 3/8 |
441.3 |
20 3/4 |
527.1 |
1 1/8 |
28.6 |
18 1/2 |
469.9 |
16 |
13 |
14 |
15 |
381.0 |
18 3/8 |
466.7 |
21 3/4 |
552.5 |
1 1/8 |
28.6 |
19 1/2 |
495.3 |
16 |
14 |
15 |
16 |
406.4 |
19 3/8 |
492.1 |
22 3/4 |
577.9 |
1 1/8 |
28.6 |
20 1/2 |
520.7 |
16 |
15 |
16 |
17 |
431.8 |
20 5/8 |
523.9 |
24 |
609.6 |
1 1/8 |
28.6 |
21 3/4 |
552.5 |
20 |
16 |
17 |
18 |
457.2 |
21 7/8 |
555.6 |
25 1/4 |
641.4 |
1 1/8 |
28.6 |
23 |
584.2 |
20 |
17 |
18 |
19 |
482.6 |
22 3/4 |
577.9 |
26 1/2 |
673.1 |
1 1/4 |
31.8 |
24 |
609.6 |
20 |
18 |
19 |
20 |
508.0 |
24 |
609.6 |
27 3/4 |
704.9 |
1 1/4 |
31.8 |
25 1/4 |
641.4 |
20 |
19 |
20 |
21 |
533.4 |
25 1/4 |
641.4 |
29 |
736.6 |
1 1/4 |
31.8 |
26 1/2 |
673.1 |
24 |
20 |
21 |
22 |
558.8 |
26 1/4 |
666.8 |
30 |
762.0 |
1 1/4 |
31.8 |
27 1/2 |
698.5 |
24 |
21 |
22 |
23 |
584.2 |
27 1/4 |
692.2 |
31 |
787.4 |
1 1/4 |
31.8 |
28 1/2 |
723.9 |
24 |
22 |
23 |
24 |
609.6 |
28 3/8 |
720.7 |
32 1/2 |
825.5 |
1 3/8 |
34.9 |
29 3/4 |
755.7 |
24 |
23 |
24 |
25 |
635.0 |
29 3/8 |
746.1 |
33 1/2 |
850.9 |
1 3/8 |
34.9 |
30 3/4 |
781.1 |
24 |
24 |