Dimensions of Spiral Wound Gaskets ASME B16.20

used with Raised Face flanges ASME B16.47 series A


Spiral Wound Gasket

OTHER PRESSURE CLASSES

150
300
400
600
900
NPS Inner Ring Sealing Element Outer Ring
d1 d2 d3 d4
26 647.7 685.8 736.6 866.9
28 698.5 736.6 787.4 914.4
30 755.7 793.8 844.6 971.6
32 812.8 850.9 901.7 1022.4
34 863.6 901.7 952.5 1073.2
36 917.7 955.8 1006.6 1130.3
38 952.5 990.6 1041.4 1104.9
40 1009.7 1047.8 1098.6 1155.7
42 1066.8 1104.9 1155.7 1219.2
44 1111.3 1162.1 1212.9 1270
46 1162.1 1212.9 1263.7 1327.2
48 1219.2 1270 1320.8 1390.7
50 1270 1320.8 1371.6 1447.8
52 1320.8 1371.6 1422.4 1498.6
54 1378 1428.8 1479.6 1555.8
56 1428.8 1479.6 1530.4 1612.9
58 1473.2 1536.7 1587.5 1663.7
60 1530.4 1593.9 1644.7 1733.6


Spiral Wound Gasket

General notes..

Marking of Spiral Wound Gaskets


Marking of Spiral Wound Gaskets

Cross Section of a Spiral Wound gasket


Cross Section of a Spiral Wound gasket