Gasket - Spiral Wound, for ANSI Class 300, B16.47, Series B (in)
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Gasket - Spiral Wound, for ANSI Class 300, B16.47, Series B (in)
Gasket - Spiral Wound, for ANSI Class 300, B16.47, Series B (in)
Dimensions to ASME B16.20 - Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound, and Jacketed
Inner rings are recommended for all graphite filled gaskets, required for all PTFE filled gaskets.
The gasket outside diameter tolerance for NPS 26" through NPS 60" is ±0.06".
The gasket inside diameter tolerance for NPS 26" through NPS 34" is ±0.03"; for NPS 36" through NPS 60" is ±0.05".
The centering ring outside diameter tolerance is ±0.03".
Pipe
Size
(NPS)
Inner
Ring
Inside
Diameter
A
Sealing
Element
Inside
Diameter
B
Sealing
Element
Outside
Diameter
C
Outer
Ring
Outside
Diameter
D
26
25.75
26.50
28.00
30.38
28
27.75
28.50
30.00
32.50
30
29.75
30.50
32.00
34.88
32
31.75
32.50
34.00
37.00
34
33.75
34.50
36.00
39.13
36
35.75
36.50
38.00
41.25
38
38.25
39.75
41.25
43.25
40
40.25
41.75
43.25
45.25
42
42.75
43.75
45.25
47.25
44
44.25
45.75
47.25
49.25
46
46.38
47.88
49.38
51.88
48
48.50
49.75
51.63
53.88
50
49.88
51.88
53.38
55.88
52
51.88
53.88
55.38
57.88
54
53.75
55.25
57.25
60.25
56
56.25
58.25
60.00
62.75
58
58.44
60.44
61.94
65.19
60
61.31
62.56
64.19
67.19
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