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ASME B16.47 Series B
Class 75 Weld Neck

ASME B16.47 Series B Class 75 Weld Neck Flange Technical Drawing

DIMENSIONAL DATA

NPS	Flange OD (O)	Thickness (T)	Raised Face Diameter (R)	Hub Diameter (X)	Hub Length (Y)	Point Fillet Radius (r)	Top of Hub (A)	Bore (B)	Bolt Circle Dia.	No. of Holes	Diameter of Bolt Hole	Hole Dia.
26	30.00	1.25	27.75	26.62	2.25	0.31	26.06	Specified by purchaser	28.50	36	3/4	5/8
28	32.00	1.25	29.75	28.62	2.38	0.31	28.06	Specified by purchaser	30.50	40	3/4	5/8
30	34.00	1.25	31.75	30.62	2.50	0.31	30.06	Specified by purchaser	32.50	44	3/4	5/8
32	36.00	1.32	33.75	32.62	2.69	0.31	32.06	Specified by purchaser	34.50	48	3/4	5/8
34	38.00	1.32	35.75	34.62	2.82	0.31	34.06	Specified by purchaser	36.50	52	3/4	5/8
36	40.69	1.38	38.00	36.81	3.32	0.38	36.06	Specified by purchaser	39.06	40	7/8	3/4
38	42.69	1.44	40.00	38.81	3.44	0.38	38.06	Specified by purchaser	41.06	40	7/8	3/4
40	44.69	1.44	42.00	40.81	3.57	0.38	40.06	Specified by purchaser	43.06	44	7/8	3/4
42	46.69	1.50	44.00	42.81	3.69	0.38	42.06	Specified by purchaser	45.06	48	7/8	3/4
44	49.25	1.63	46.25	44.88	4.07	0.38	44.06	Specified by purchaser	47.38	36	1	7/8
46	51.25	1.69	48.25	46.88	4.19	0.38	46.06	Specified by purchaser	49.38	40	1	7/8
48	53.25	1.75	50.25	48.88	4.32	0.38	48.06	Specified by purchaser	51.38	44	1	7/8
50	55.25	1.82	52.25	50.94	4.50	0.38	50.06	Specified by purchaser	53.38	44	1	7/8
52	57.38	1.82	54.25	52.94	4.69	0.38	52.06	Specified by purchaser	55.50	48	1	7/8
54	59.38	1.88	56.25	55.00	4.88	0.38	54.06	Specified by purchaser	57.50	48	1	7/8
56	62.00	1.94	58.50	57.12	5.25	0.44	56.06	Specified by purchaser	59.88	40	1-1/8	1
58	64.00	2.00	60.50	59.12	5.38	0.44	58.06	Specified by purchaser	61.88	44	1-1/8	1
60	66.00	2.13	62.50	61.12	5.63	0.44	60.06	Specified by purchaser	63.88	44	1-1/8	1

NPS	Flange OD (O)	Thickness (T)	Raised Face Diameter (R)	Hub Diameter (X)	Hub Length (Y)	Point Fillet Radius (r)	Top of Hub (A)	Bore (B)	Bolt Circle Dia.	No. of Holes	Diameter of Bolt Hole (Inch)	Diameter of Bolt (Inch)
26	760	31.8	705	676	57	8	661.9	Specified by purchaser	723.9	36	3/4	5/8
28	813	31.8	756	727	60	8	712.7	Specified by purchaser	774.7	40	3/4	5/8
30	864	31.8	806	778	64	8	763.5	Specified by purchaser	825.5	44	3/4	5/8
32	914	33.5	857	829	68	8	814.3	Specified by purchaser	876.3	48	3/4	5/8
34	965	33.5	908	879	72	8	865.1	Specified by purchaser	927.1	52	3/4	5/8
36	1034	35.1	965	935	84	10	915.9	Specified by purchaser	992.1	40	7/8	3/4
38	1084	36.6	1016	986	87	10	966.7	Specified by purchaser	1042.9	40	7/8	3/4
40	1135	36.6	1067	1037	91	10	1017.5	Specified by purchaser	1093.7	44	7/8	3/4
42	1186	38.1	1118	1087	94	10	1068.3	Specified by purchaser	1144.5	48	7/8	3/4
44	1251	41.4	1175	1140	103	10	1119.1	Specified by purchaser	1203.5	36	1	7/8
46	1302	42.9	1226	1191	106	10	1169.9	Specified by purchaser	1254.3	40	1	7/8
48	1353	44.6	1276	1242	110	10	1220.7	Specified by purchaser	1305.1	44	1	7/8
50	1403	46.2	1327	1294	114	10	1271.5	Specified by purchaser	1355.9	44	1	7/8
52	1457	46.2	1378	1345	119	10	1322.3	Specified by purchaser	1409.7	48	1	7/8
54	1508	47.8	1429	1397	124	10	1373.1	Specified by purchaser	1460.5	48	1	7/8
56	1575	49.3	1486	1451	133	11	1423.9	Specified by purchaser	1521.0	40	1-1/8	1
58	1626	50.8	1537	1502	137	11	1474.7	Specified by purchaser	1571.8	44	1-1/8	1
60	1676	54.1	1588	1553	143	11	1525.5	Specified by purchaser	1622.6	44	1-1/8	1

Dimensions are based on ASME B16.47 Series B Class 75 flange requirements. Refer to the applicable standard for complete dimensional requirements.

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