Dimensions of Class 150 Flat Ring Gaskets (up to 24 inches) as per ASME B16.21 to Suit ASME B16.5 Flanges.
| CLASS 150 | ||||
|---|---|---|---|---|
| Nominal Pipe Size (NPS) |
Inside Diameter (ID) |
Outside Diameter (OD) |
||
| inches | mm | inches | mm | |
| 1/2 | 0.84 | 21 | 1.88 | 48 |
| 3/4 | 1.06 | 27 | 2.25 | 57 |
| 1 | 1.31 | 33 | 2.62 | 67 |
| 1 1/4 | 1.66 | 42 | 3.00 | 76 |
| 1 1/2 | 1.91 | 49 | 3.38 | 86 |
| 2 | 2.38 | 60 | 4.12 | 105 |
| 21/2 | 2.88 | 73 | 4.88 | 124 |
| 3 | 3.50 | 89 | 5.38 | 137 |
| 31/2 | 4.00 | 102 | 6.38 | 162 |
| 4 | 4.50 | 114 | 6.88 | 175 |
| 5 | 5.56 | 141 | 7.75 | 197 |
| 6 | 6.62 | 168 | 8.75 | 222 |
| 8 | 8.62 | 219 | 11.00 | 279 |
| 10 | 10.75 | 273 | 13.38 | 340 |
| 12 | 12.75 | 324 | 16.13 | 410 |
| 14 | 14.00 | 356 | 17.75 | 451 |
| 16 | 16.00 | 406 | 20.25 | 514 |
| 18 | 18.00 | 457 | 21.62 | 549 |
| 20 | 20.00 | 508 | 23.88 | 607 |
| 24 | 24.00 | 610 | 28.25 | 718 |