Spiral Wound ANSI Class 300 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".

Pipe Size (NPS)	Inner Ring Inside Diamete A	Sealing Element Inside Diameter B	Sealing Element Outside Diameter C	Outer Ring Outside Diameter D
26	25.75	27.00	29.00	32.88
28	27.75	29.00	31.00	35.38
30	29.75	31.25	33.25	37.50
32	31.75	33.50	35.50	39.63
34	33.75	35.50	37.50	41.63
36	35.75	37.63	39.63	44.00
38	37.50	38.50	40.00	41.50
40	39.50	40.25	42.13	43.88
42	41.50	42.25	44.13	45.88
44	43.50	44.50	46.50	48.00
46	45.38	46.38	48.38	50.13
48	47.63	48.63	50.63	52.13
50	49.00	51.00	53.00	54.25
52	52.00	53.00	55.00	56.25
54	53.25	55.25	57.25	58.75
56	55.25	57.25	59.25	60.75
58	57.00	59.50	61.50	62.75
60	60.00	61.50	63.50	64.75