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Dims of Spiral Wound Gaskets ASME B16.20 used with Raised Face flanges ASME B16.5

Cross-section Spiral Wound gasket

Other Pressure Classes

NPS Inner Ring Sealing Element Outer Ring
d1 d2 d3 d4
1/2 14.2 19.1 31.8 63.5
3/4 20.6 25.4 39.6 69.9
1 26.9 31.8 47.8 79.5
33.3 39.6 60.5 88.9
41.4 47.8 69.9 98.6
2 52.3 58.7 85.9 143
63.5 69.9 98.6 165.1
3 78.7 92.2 120.7 174.8
4 97.8 117.6 149.4 209.6
5 124.5 143 177.8 254
6 147.3 171.5 209.6 282.7
8 196.9 215.9 257.3 352.6
10 246.1 266.7 311.2 435.1
12 292.1 323.9 368.3 520.7
14 320.8 362 400.1 577.9
16 374.7 406.4 457.2 641.4
18 425.5 463.6 520.7 704.9
20 476.3 514.4 571.5 755.7
24 577.9 616 679.5 901.7

General notes:

Marking of Spiral Wound Gaskets

Marking of Spiral Wound Gaskets
PP
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