Gasket - Spiral Wound, for ANSI Class 400, 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".
| 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 | 32.75 |
| 28 | 28.00 | 29.00 | 31.00 | 35.13 |
| 30 | 29.75 | 31.25 | 33.25 | 37.25 |
| 32 | 32.00 | 33.50 | 35.50 | 39.50 |
| 34 | 34.00 | 35.50 | 37.50 | 41.50 |
| 36 | 36.13 | 37.63 | 39.63 | 44.00 |
| 38 | 37.50 | 38.25 | 40.25 | 42.25 |
| 40 | 39.38 | 40.38 | 42.38 | 44.38 |
| 42 | 41.38 | 42.38 | 44.38 | 46.38 |
| 44 | 43.50 | 44.50 | 46.50 | 48.50 |
| 46 | 46.00 | 47.00 | 49.00 | 50.75 |
| 48 | 47.50 | 49.00 | 51.00 | 53.00 |
| 50 | 49.50 | 51.00 | 53.00 | 55.25 |
| 52 | 51.50 | 53.00 | 55.00 | 57.25 |
| 54 | 53.25 | 55.25 | 57.25 | 59.75 |
| 56 | 55.25 | 57.25 | 59.25 | 61.75 |
| 58 | 57.25 | 59.25 | 61.25 | 63.75 |
| 60 | 59.75 | 61.75 | 63.75 | 66.25 |