Gasket dimensions for male – female and tongue and groove gaskets
ANSI flanges – all pressure classes
Nominal diameter |
Large male-female |
Small tongue and groove |
Large tongue and groove |
Class 150-1500 |
Class 2500 |
Outer diameter |
Inner diameter |
Outer diameter |
Inner diameter |
Outer diameter |
Inner diameter |
Outer diameter |
Inner diameter |
1/4 |
1 |
25.4 |
1/2 |
12.7 |
– |
– |
– |
– |
– |
|
– |
|
1 |
|
1/2 |
|
1/2 |
1 3/8 |
34.9 |
1 |
25.4 |
1 3/8 |
34.9 |
13/16 |
20.6 |
1 3/8 |
34.9 |
1 |
25.4 |
1 3/8 |
34.9 |
1 |
25.4 |
3/4 |
1 11/16 |
42.9 |
1 5/16 |
33.3 |
1 11/16 |
42.9 |
1 1/16 |
27.0 |
1 11/16 |
42.9 |
1 5/16 |
33.3 |
1 11/16 |
42.9 |
1 5/16 |
33.3 |
1 |
2 |
50.8 |
1 1/2 |
38.1 |
2 |
50.8 |
1 1/4 |
31.8 |
1 7/8 |
47.6 |
1 1/2 |
38.1 |
2 |
50.8 |
1 1/2 |
38.1 |
1 1/4 |
2 1/2 |
63.5 |
1 7/8 |
47.6 |
2 1/2 |
63.5 |
1 5/8 |
41.3 |
2 1/4 |
57.2 |
1 7/8 |
47.6 |
2 1/2 |
63.5 |
1 7/8 |
47.6 |
1 1/2 |
2 7/8 |
73.0 |
2 1/8 |
54.0 |
2 7/8 |
73.0 |
1 7/8 |
47.6 |
2 1/2 |
63.5 |
2 1/8 |
54.0 |
2 7/8 |
73.0 |
2 1/8 |
54.0 |
2 |
3 5/8 |
92.1 |
2 7/8 |
73.0 |
3 5/8 |
92.1 |
2 3/8 |
60.3 |
3 1/4 |
82.6 |
2 7/8 |
73.0 |
3 5/8 |
92.1 |
2 7/8 |
73.0 |
2 1/2 |
4 1/8 |
104.8 |
3 3/8 |
85.7 |
4 1/8 |
104.8 |
3 |
76.2 |
3 3/4 |
95.3 |
3 3/8 |
85.7 |
4 1/8 |
104.8 |
3 3/8 |
85.7 |
3 |
5 |
127.0 |
4 1/4 |
108.0 |
5 |
127.0 |
3 3/4 |
95.3 |
4 5/8 |
117.5 |
4 1/4 |
108.0 |
5 |
127.0 |
4 1/4 |
108.0 |
3 1/2 |
5 1/2 |
139.7 |
4 3/4 |
120.7 |
– |
– |
– |
– |
5 1/8 |
130.2 |
4 3/4 |
120.7 |
5 1/2 |
139.7 |
4 3/4 |
120.7 |
4 |
6 3/16 |
157.2 |
5 3/16 |
131.8 |
6 3/16 |
157.2 |
4 3/4 |
120.7 |
5 11/16 |
144.5 |
5 3/16 |
131.8 |
6 3/16 |
157.2 |
5 3/16 |
131.8 |
4 1/2 |
6 3/4 |
171.5 |
5 11/16 |
144.5 |
– |
– |
– |
– |
– |
– |
– |
– |
6 3/4 |
171.5 |
5 11/16 |
144.5 |
5 |
7 5/16 |
185.7 |
6 5/16 |
160.3 |
7 5/16 |
185.7 |
5 3/4 |
146.1 |
6 13/16 |
173.0 |
6 5/16 |
160.3 |
7 5/16 |
185.7 |
6 5/1 |
160.3 |
6 |
8 1/2 |
215.9 |
7 1/2 |
190.5 |
8 1/2 |
215.9 |
6 3/4 |
171.5 |
8 |
203.2 |
7 1/2 |
190.5 |
8 1/2 |
215.9 |
7 1/2 |
190.5 |
8 |
10 5/8 |
269.9 |
9 3/8 |
238.1 |
10 5/8 |
269.9 |
8 3/4 |
222.3 |
10 |
254.0 |
9 3/8 |
238.1 |
10 5/8 |
269.9 |
9 3/8 |
238.1 |
10 |
12 3/4 |
323.9 |
11 1/4 |
285.8 |
12 3/4 |
323.9 |
10 3/4 |
273.1 |
12 |
304.8 |
11 1/4 |
285.8 |
12 3/4 |
323.9 |
11 1/4 |
285.8 |
12 |
15 |
381.0 |
13 1/2 |
342.9 |
15 |
381.0 |
13 |
330.2 |
14 1/4 |
362.0 |
13 1/2 |
342.9 |
15 |
381.0 |
13 1/2 |
342.9 |
14 |
16 1/4 |
412.8 |
14 3/4 |
374.7 |
– |
– |
– |
– |
15 1/2 |
393.7 |
14 3/4 |
374.7 |
16 1/4 |
412.8 |
14 3/4 |
374.7 |
16 |
18 1/2 |
469.9 |
17 |
431.8 |
– |
– |
– |
– |
17 5/8 |
447.7 |
16 3/4 |
425.5 |
18 1/2 |
469.9 |
17 |
431.8 |
18 |
21 |
533.4 |
19 1/4 |
489.0 |
– |
– |
– |
– |
20 1/8 |
511.2 |
19 1/4 |
489.0 |
21 |
533.4 |
19 1/4 |
489.0 |
20 |
23 |
584.2 |
21 |
533.4 |
– |
– |
– |
– |
22 |
558.8 |
21 |
533.4 |
23 |
584.2 |
21 |
533.4 |
24 |
27 1/4 |
692.2 |
25 1/4 |
641.4 |
– |
– |
– |
– |
26 1/4 |
666.8 |
25 1/4 |
641.4 |
27 1/4 |
692.2 |
25 1/4 |
641.4 |