Ring Gaskets | Seal & Design, Inc.
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Ring Gaskets

Seal & Design can fabricate a wide variety of ring gaskets for any pipe size. The lists below are standard guidelines for both 150lb and 300lb ring gaskets. 

Ring Gaskets for 150 lb ASME/ANSI Pipe Flanges

 

There are two styles for Ring Gaskets, Old and New.
Ring Gasket 150lb Comparison Chart

  • 150 lb - New Style
  • 150 lb - Old vs New
150lb Ring Gasket New Standard
Nominal Pipe Size Gasket I.D.
(Inches)		 Gasket O.D.
(Inches)
1/2 27/32 1 7/8
3/4 1 1/16 2 1/4
1 1 5/16 2 5/8
1 1/4 1 21/32 3
1 1/2 1 29/32 3 3/8
2 2 3/8 4 1/8
2 1/2 2 7/8 4 7/8
3 3 1/2 5 3/8
3 1/2 4 6 3/8
4 4 1/2 6 7/8
4 1/2 5 7
5 5 9/16 7 3/4
6 6 5/8 8 3/4
7 7 5/8 10
8 8 5/8 11
10 10 3/4 13 3/8
12 12 3/4 16 1/8
14 14 17 3/4
15 15 19
16 16 20 1/4
18 18 21 5/8
20 20 23 7/8
22 22 26
24 24 28 1/4
26 26 30 1/2
28 28 32 3/4
30 30 34 3/4
32 32 37
34 34 39
36 36 41 1/4
38 38 43 5/8
40 40 45 5/8
42 42 48
46 46 52 1/8
48 48 54 1/2
50 50 56 1/2
52 52 58 3/4
54 54 61
60 60 67 1/2
66 66 74 1/4
72 72 80 3/4
84 84 93 1/2
96 96 106 1/4
  New STD   Old STD
Size I.D.
(Inches)		 O.D.
(Inches)		   I.D.
(Inches)		 O.D.
(Inches)
1/2 27/32 1 7/8   1/2 1 7/8
3/4 1 1/16 2 1/4   3/4 2 1/4
1 1 5/16 2 5/8   1 2 5/8
1-1/4 1 21/32 3   1 1/4 3
1-1/2 1 29/32 3 3/8   1 1/2 3 3/8
2 2 3/8 4 1/8   2 4 1/8
2-1/2 2 7/8 4 7/8   2 1/2 4 7/8
3 3 1/2 5 3/8   3 5 3/8
3-1/2 4 6 3/8   3 1/2 6 3/8
4 4 1/2 6 7/8   4 6 7/8
4 1/2 5 7   4 1/2 7
5 5 9/16 7 3/4   5 7 3/4
6 6 5/8 8 3/4   6 8 3/4
7 7 5/8 10   7 10
8 8 5/8 11   8 11
9 9 5/8 12 1/2   9 12 1/2
10 10 3/4 13 3/8   10 13 3/8
12 12 3/4 16 1/8   12 16 1/8
14 14 17 3/4   14 17 3/4
15 15 19   15 19
16 16 20 1/4   16 20 1/4
18 18 21 5/8   18 21 5/8
20 20 23 7/8   20 23 7/8
22 22 26   22 26

Ring Gaskets for 300 lb ASME/ANSI Pipe Flanges

There are two styles for Ring Gaskets, Old and New.
Ring Gasket 300lb Comparison Chart

  • 300 lb - New Style
  • 300 lb - Old Style
300lb Ring Gasket New Standard
Nominal Pipe Size Gasket I.D.
(Inches)		 Gasket O.D.
(Inches)
1/2 27/32 2 1/8
3/4 1 1/16 2 5/8
1 1 5/16 2 7/8
1 1/4 1 21/32 3 1/4
1 1/2 1 29/32 3 3/4
2 2 3/8 4 3/8
2 1/2 2 7/8 5 1/8
3 3 1/2 5 7/8
3 1/2 4 6 1/2
4 4 1/2 7 1/8
4 1/2 5 7 5/8
5 5 9/16 8 1/2
6 6 5/8 9 7/8
7 7 5/8 10 7/8
8 8 5/8 12 1/8
10 10 3/4 14 1/4
12 12 3/4 16 5/8
14 14 19 1/8
15 15 20 1/8
16 16 21 1/4
18 18 23 1/2
20 20 25 3/4
22 22 27 5/8
24 24 30 1/2
30 30 37 1/2
36 36 44
42 42 50 3/4
48 48 58 3/4
  New STD   Old STD
Size I.D.
(Inches)		 O.D.
(Inches)		   I.D.
(Inches)		 O.D.
(Inches)
1/2 27/32 2 1/8   1/2 2 1/8
3/4 1 1/16 2 5/8   3/4 2 5/8
1 1 5/16 2 7/8   1 2 7/8
1 1/4 1 21/32 3 1/4   1 1/4 3 1/4
1 1/2 1 29/32 3 3/4   1 1/2 3 3/4
2 2 3/8 4 3/8   2 4 3/8
2 1/2 2 7/8 5 1/8   2 1/2 5 1/8
3 3 1/2 5 7/8   3 5 7/8
3 1/2 4 6 1/2   3 1/2 6 1/2
4 4 1/2 7 1/8   4 7 1/8
4 1/2 5 7-5/8   4 1/2 7 5/8
5 5 9/16 8 1/2   5 8 1/2
6 6 5/8 9 7/8   6 9 7/8
7 7 5/8 10-7/8   7 10 7/8
8 8 5/8 12 1/8   8 12 1/8
9 9 5/8 12 7/8   9 12 7/8
10 10 3/4 14 1/4   10 14 1/4
12 12 3/4 16 5/8   12 16 5/8
14 14 19 1/8   13 1/4 19 1/8
15 15 20 1/8   14 1/4 20 1/8
16 16 21 1/4   15 1/4 21 1/4
18 18 23 1/2   17 23 1/2
20 20 25 3/4   19 25 3/4
22 22 27 5/8   21 27 5/8