ASME B16.47 Series B Class 300 Flange Dimensions

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Nominal Size	Outside Diameter (OD)	Min. Thickness [Note1] – WNF  (tf)	Min. Thickness [Note1] – Blind  (tf)	Length Through Hub  (Y)	Hub Dia. Base [Note2] (X)	Hub Dia. Top (A)	Raised Face Dia.  (R)	Drilling – Bolt Circle Dia.	Drilling – No. of Bolt Holes	Drilling – Dia. of Bolt Hole	Dia. of Bolt	Min. Fillet Radius (r1)
26	34.12	3.44	3.44	5.63	27.62	26.19	29.00	31.62	32	13⁄8	11⁄4	0.56
28	36.25	3.44	3.44	5.81	29.75	28.19	31.00	33.75	36	13⁄8	11⁄4	0.56
30	39.00	3.63	3.63	6.16	32.00	30.25	33.25	36.25	36	11⁄2	13⁄8	0.56
32	41.50	4.00	4.00	6.56	34.00	32.35	35.50	38.50	32	15⁄8	11⁄2	0.62
34	43.62	4.00	4.00	6.75	36.12	34.25	37.50	40.62	36	15⁄8	11⁄2	0.62
36	46.12	4.00	4.00	7.06	38.00	36.25	39.75	42.88	32	13⁄4	15⁄8	0.62
38	48.12	4.31	4.31	7.50	40.00	38.25	41.75	44.88	36	13⁄4	15⁄8	0.62
40	50.12	4.50	4.50	7.75	42.00	40.25	43.88	46.88	40	13⁄4	15⁄8	0.62
42	52.50	4.63	4.63	8.00	44.00	42.31	46.00	49.00	36	17⁄8	13⁄4	0.62
44	54.50	4.94	4.94	8.38	46.19	44.31	48.00	51.00	40	17⁄8	13⁄4	0.62
46	57.50	5.00	5.06	8.69	48.38	46.31	50.00	53.75	36	2	17⁄8	0.62
48	59.50	5.00	5.25	8.75	50.31	48.31	52.25	55.75	40	2	17⁄8	0.62
50	61.50	5.38	5.44	9.19	52.38	50.31	54.25	57.75	44	2	17⁄8	0.62
52	63.50	5.56	5.61	9.50	54.44	52.31	56.25	59.75	48	2	17⁄8	0.62
54	65.88	5.32	5.81	9.38	56.50	54.31	58.25	62.12	48	2	17⁄8	0.62
56	69.50	6.00	6.12	10.50	58.81	56.31	60.50	65.00	36	23⁄8	21⁄4	0.69
58	71.94	6.00	6.31	10.75	60.94	58.31	62.75	67.44	40	23⁄8	21⁄4	0.69
60	73.94	5.88	6.50	10.63	62.94	60.31	65.00	69.44	40	23⁄8	21⁄4	0.69

ASME B16.47 Series B Class 300 Flange Industries and Applications Widely used in the industries

ASME B16.47 Series B Class 300 Flange Supply and Export Network List of Cities and Countries