Spiral Wound ANSI Class 400 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	26.25	27.50	29.38
28	27.63	28.13	29.50	31.50
30	29.63	30.13	31.75	33.75
32	31.50	32.00	33.88	35.88
34	33.50	34.13	35.88	37.88
36	35.38	36.13	38.00	40.25
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