Spiral Wound ANSI Class 300 Gasket, 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