Seal & Design Inc. | Seal & Gasket Manufacturer | Custom Seals | Ring Gaskets

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

150lb Ring Gasket New Standard
Nominal Pipe SizeGasket I.D.
(Inches)
Gasket O.D.
(Inches)
1/227/321 7/8
3/41 1/162 1/4
11 5/162 5/8
1 1/41 21/323
1 1/21 29/323 3/8
22 3/84 1/8
2 1/22 7/84 7/8
33 1/25 3/8
3 1/246 3/8
44 1/26 7/8
4 1/257
55 9/167 3/4
66 5/88 3/4
77 5/810
88 5/811
1010 3/413 3/8
1212 3/416 1/8
141417 3/4
151519
161620 1/4
181821 5/8
202023 7/8
222226
242428 1/4
262630 1/2
282832 3/4
303034 3/4
323237
343439
363641 1/4
383843 5/8
404045 5/8
424248
464652 1/8
484854 1/2
505056 1/2
525258 3/4
545461
606067 1/2
666674 1/4
727280 3/4
848493 1/2
9696106 1/4

New STD
Old STD
SizeI.D.
(Inches)
O.D.
(Inches)

I.D.
(Inches)
O.D.
(Inches)
1/227/321 7/8
1/21 7/8
3/41 1/162 1/4
3/42 1/4
11 5/162 5/8
12 5/8
1-1/41 21/323
1 1/43
1-1/21 29/323 3/8
1 1/23 3/8
22 3/84 1/8
24 1/8
2-1/22 7/84 7/8
2 1/24 7/8
33 1/25 3/8
35 3/8
3-1/246 3/8
3 1/26 3/8
44 1/26 7/8
46 7/8
4 1/257
4 1/27
55 9/167 3/4
57 3/4
66 5/88 3/4
68 3/4
77 5/810
710
88 5/811
811
99 5/812 1/2
912 1/2
1010 3/413 3/8
1013 3/8
1212 3/416 1/8
1216 1/8
141417 3/4
1417 3/4
151519
1519
161620 1/4
1620 1/4
181821 5/8
1821 5/8
202023 7/8
2023 7/8
222226
2226

Ring Gaskets for 300 lb ASME/ANSI Pipe Flanges

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

300lb Ring Gasket New Standard
Nominal Pipe SizeGasket I.D.
(Inches)
Gasket O.D.
(Inches)
1/227/322 1/8
3/41 1/162 5/8
11 5/162 7/8
1 1/41 21/323 1/4
1 1/21 29/323 3/4
22 3/84 3/8
2 1/22 7/85 1/8
33 1/25 7/8
3 1/246 1/2
44 1/27 1/8
4 1/257 5/8
55 9/168 1/2
66 5/89 7/8
77 5/810 7/8
88 5/812 1/8
1010 3/414 1/4
1212 3/416 5/8
141419 1/8
151520 1/8
161621 1/4
181823 1/2
202025 3/4
222227 5/8
242430 1/2
303037 1/2
363644
424250 3/4
484858 3/4

New STD
Old STD
SizeI.D.
(Inches)
O.D.
(Inches)

I.D.
(Inches)
O.D.
(Inches)
1/227/322 1/8
1/22 1/8
3/41 1/162 5/8
3/42 5/8
11 5/162 7/8
12 7/8
1 1/41 21/323 1/4
1 1/43 1/4
1 1/21 29/323 3/4
1 1/23 3/4
22 3/84 3/8
24 3/8
2 1/22 7/85 1/8
2 1/25 1/8
33 1/25 7/8
35 7/8
3 1/246 1/2
3 1/26 1/2
44 1/27 1/8
47 1/8
4 1/257-5/8
4 1/27 5/8
55 9/168 1/2
58 1/2
66 5/89 7/8
69 7/8
77 5/810-7/8
710 7/8
88 5/812 1/8
812 1/8
99 5/812 7/8
912 7/8
1010 3/414 1/4
1014 1/4
1212 3/416 5/8
1216 5/8
141419 1/8
13 1/419 1/8
151520 1/8
14 1/420 1/8
161621 1/4
15 1/421 1/4
181823 1/2
1723 1/2
202025 3/4
1925 3/4
222227 5/8
2127 5/8