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.

Spiral Wound Gasket Dimensions

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

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