Dimensions of Non-Metallic Flat Gaskets ASME B16.21
to be used with RF flanges ASME B16.47 series A
NPS 26 - 60
| NPS | d1 | d2 | |||
| Class 150 |
Class 300 |
Class 400 |
Class 600 |
||
| 26 | 660 | 775 | 835 | 832 | 867 |
| 28 | 711 | 832 | 899 | 892 | 914 |
| 30 | 762 | 883 | 953 | 946 | 972 |
| 32 | 813 | 940 | 1006 | 1003 | 1022 |
| 34 | 864 | 991 | 1057 | 1054 | 1073 |
| 36 | 914 | 1048 | 1118 | 1118 | 1130 |
| 38 | 965 | 1111 | 1054 | 1073 | 1105 |
| 40 | 1016 | 1162 | 1114 | 1127 | 1156 |
| 42 | 1067 | 1219 | 1165 | 1178 | 1219 |
| 44 | 1118 | 1276 | 1219 | 1232 | 1270 |
| 46 | 1168 | 1327 | 1273 | 1289 | 1327 |
| 48 | 1219 | 1384 | 1324 | 1346 | 1391 |
| 50 | 1270 | 1435 | 1378 | 1403 | 1448 |
| 52 | 1321 | 1492 | 1429 | 1454 | 1499 |
| 54 | 1372 | 1549 | 1492 | 1518 | 1556 |
| 56 | 1422 | 1607 | 1543 | 1568 | 1613 |
| 58 | 1473 | 1664 | 1594 | 1619 | 1664 |
| 60 | 1524 | 1715 | 1645 | 1683 | 1721 |
General notes..
- Dimensions are in millimeters unless otherwise indicated.
- d1 = Inside diameter.
- d2 = Outside diameter.
- Dimensional tolerances OD.. +0 / -3.0 mm.
- Dimensional tolerances ID.. ± 3.0 mm.
- Thickness (t) specified by customer.