Spiral Wound ANSI Class 150 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".

Pipen 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	27.75	30.50
28	27.75	28.50	29.75	32.75
30	29.75	30.50	31.75	34.75
32	31.75	32.50	33.88	37.00
34	33.75	34.50	35.88	39.00
36	35.75	36.50	38.13	41.25
38	37.75	38.50	40.13	43.75
40	39.75	40.50	42.13	45.75
42	41.75	42.50	44.25	48.00
44	43.75	44.50	46.38	50.25
46	45.75	46.50	48.38	52.25
48	47.75	48.50	50.38	54.50
50	49.75	50.50	52.50	56.50
52	51.75	52.50	54.50	58.75
54	53.50	54.50	56.50	61.00
56	55.50	56.50	58.50	63.25
58	57.50	58.50	60.50	65.50
60	59.50	60.50	62.50	67.50