Spiral Wound ANSI Class 900 Gasket, 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