Ring Gaskets for 300 lb ASME/ANSI Pipe Flanges (OLD STYLE)
This chart shows the difference between the new ring gaskets standard and the old ring gaskets standard.
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| RINGS | |||||
| New STD | Old STD | ||||
| Size | I.D. | O.D. | I.D. | O.D. | |
| 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" | |