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 |