ANSI / ASME B16.47 Series A Class 600 Weld Neck Flange Dimensions

Nominal Pipe Size	Outside Diameter (O)	Min Thickness (T)	Raised Face Diameter (R)	Length Thru Hub (Y)	Hub Diameter (X)	Minimum Fillet Radius (r)	Top of Hub (A)	Bore (B)	Approximate Weight (lbs)	Bolt Circle (C)	Number of Holes	Diameter of Holes
26	40.00	4.25	29.50	8.75	29.44	0.50	26.00	Specified by purchaser	940	36.00	28	2.00
28	42.25	4.38	31.50	9.25	31.62	0.50	28.00	Specified by purchaser	1060	38.00	28	2.12
30	44.50	4.50	33.75	9.75	33.94	0.50	30.00	Specified by purchaser	1210	40.25	28	2.12
32	47.00	4.62	36.00	10.25	36.12	0.50	32.00	Specified by purchaser	1375	42.50	28	2.38
34	49.00	4.75	38.00	10.62	38.31	0.56	34.00	Specified by purchaser	1540	44.50	28	2.38
36	51.75	4.88	40.25	11.12	40.62	0.56	36.00	Specified by purchaser	1705	47.00	28	2.62
38	50.00	6.00	41.50	10.00	40.25	0.56	38.00	Specified by purchaser	1470	45.75	28	2.38
40	52.00	6.25	43.75	10.38	42.25	0.56	40.00	Specified by purchaser	1630	47.75	32	2.38
42	55.25	6.62	46.00	11.00	44.38	0.56	42.00	Specified by purchaser	2030	50.50	28	2.62
44	57.25	6.81	48.25	11.38	46.50	0.56	44.00	Specified by purchaser	2160	52.50	32	2.62
46	59.50	7.06	50.25	11.81	48.62	0.56	46.00	Specified by purchaser	2410	54.75	32	2.62
48	62.75	7.44	52.50	12.44	50.75	0.56	48.00	Specified by purchaser	2855	57.50	32	2.88
50	65.75	7.75	54.50	12.94	52.88	0.56	50.00	Specified by purchaser	3330	60.00	28	3.12
52	67.75	8.00	56.50	13.25	54.88	0.56	52.00	Specified by purchaser	3560	62.00	32	3.12
54	70.00	8.25	58.75	13.75	57.00	0.56	54.00	Specified by purchaser	3920	64.25	32	3.12
56	73.00	8.56	60.75	14.25	59.12	0.62	56.00	Specified by purchaser	4280	66.75	32	3.38
58	75.00	8.75	63.00	14.56	61.12	0.62	58.00	Specified by purchaser	4640	68.75	32	3.38
60	78.50	9.19	65.25	15.31	63.38	0.69	60.00	Specified by purchaser	5000	71.75	28	3.62

*Use 25.4 as a factor to convert into mm.