Gasket - Spiral Wound, for ANSI Class 900, B16.47, Series A (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".
- There are no Class 900 flanges in NPS 50" and larger.
Pipe
Size (NPS) | Inner
Ring Inside Diameter A | Sealing
Element Inside Diameter B | Sealing
Element Outside Diameter C | Outer
Ring Outside Diameter D |
---|---|---|---|---|
26 | 26.00 | 27.00 | 29.00 | 34.75 |
28 | 28.00 | 29.00 | 31.00 | 37.25 |
30 | 30.25 | 31.25 | 33.25 | 39.75 |
32 | 32.00 | 33.50 | 35.50 | 42.25 |
34 | 34.00 | 35.50 | 37.50 | 44.75 |
36 | 36.25 | 37.75 | 39.75 | 47.25 |
38 | 39.75 | 40.75 | 42.75 | 47.25 |
40 | 41.75 | 43.25 | 45.25 | 49.25 |
42 | 43.75 | 45.25 | 47.25 | 51.25 |
44 | 45.50 | 47.50 | 49.50 | 53.88 |
46 | 48.00 | 50.00 | 52.00 | 56.50 |
48 | 50.00 | 52.00 | 54.00 | 58.50 |