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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 54.1
3/4 20.6 25.4 39.6 66.8
1 26.9 31.8 47.8 73.2
38.1 47.8 60.5 82.6
44.5 54.1 69.9 95.3
2 55.6 69.9 85.9 111.3
66.5 82.6 98.6 130.3
3 81 101.6 120.7 149.4
4 106.4 127 149.4 181.1
5 131.8 155.7 177.8 215.9
6 157.2 182.6 209.6 251
8 215.9 233.4 263.7 308.1
10 268.2 287.3 317.5 362
12 317.5 339.9 374.7 422.4
14 349.3 371.6 406.4 485.9
16 400.1 422.4 463.6 539.8
18 449.3 474.7 527.1 596.9
20 500.1 525.6 577.9 654.1
24 603.3 628.7 685.8 774.7

General notes:

Marking of Spiral Wound Gaskets

Marking of Spiral Wound Gaskets
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