Spiral wound gasket dimension to ASME B16.20 to suit ASME B16.47 Series A Flanges.
Dimensions D1, D2, D3 and D4 are in mm.
| Nom Pipe Size |
Inside Diameter of Inner Ring (D1) |
Inner Diameter of Sealing Element (D2) |
Outside Diameter of Sealing Element (D3) |
Outer Diameter of Centering Ring (D4) |
|---|---|---|---|---|
| 26 | 654.1 | 673.1 | 711.2 | 771.7 |
| 28 | 704.9 | 723.9 | 762.0 | 825.5 |
| 30 | 755.7 | 774.7 | 812.8 | 886.0 |
| 32 | 806.5 | 825.5 | 863.6 | 939.8 |
| 34 | 857.3 | 876.3 | 914.4 | 993.9 |
| 36 | 908.1 | 927.1 | 965.2 | 1047.8 |
| 38 | 971.6 | 1009.7 | 1047.8 | 1098.6 |
| 40 | 1022.4 | 1060.5 | 1098.6 | 1149.4 |
| 42 | 1085.9 | 1111.3 | 1149.4 | 1200.2 |
| 44 | 1124.0 | 1162.1 | 1200.2 | 1251.0 |
| 46 | 1178.1 | 1216.2 | 1254.3 | 1317.8 |
| 48 | 1231.9 | 1263.7 | 1311.4 | 1368.6 |
| 50 | 1267.0 | 1317.8 | 1355.9 | 1419.4 |
| 52 | 1317.8 | 1368.6 | 1406.7 | 1470.2 |
| 54 | 1365.3 | 1403.4 | 1454.2 | 1530.4 |
| 56 | 1428.8 | 1479.6 | 1524.0 | 1593.9 |
| 58 | 1484.4 | 1535.2 | 1573.3 | 1655.8 |
| 60 | 1557.3 | 1589.0 | 1630.4 | 1706.6 |