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ASME B16.47 Series B
Class 150 Weld Neck

ASME B16.47 Series B Class 150 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	30.94	1.57	28.00	26.94	3.44	0.38	26.06	Specified by purchaser	29.31	36	7/8	3/4
28	32.94	1.69	30.00	28.94	3.69	0.38	28.06	Specified by purchaser	31.31	40	7/8	3/4
30	34.94	1.69	32.00	31.00	3.88	0.38	30.06	Specified by purchaser	33.31	44	7/8	3/4
32	37.06	1.75	34.00	33.06	4.19	0.38	32.06	Specified by purchaser	35.44	48	7/8	3/4
34	39.56	1.88	36.25	35.12	4.28	0.38	34.06	Specified by purchaser	37.69	40	1	7/8
36	41.62	2.00	38.25	37.19	4.57	0.38	36.06	Specified by purchaser	39.75	44	1	7/8
38	44.25	2.07	40.25	39.25	4.82	0.38	38.12	Specified by purchaser	42.12	40	1-1/8	1
40	46.25	2.13	42.50	41.31	5.00	0.38	40.12	Specified by purchaser	44.12	44	1-1/8	1
42	48.25	2.25	44.50	43.38	5.19	0.44	42.12	Specified by purchaser	46.12	48	1-1/8	1
44	50.25	2.32	46.50	45.38	5.32	0.44	44.12	Specified by purchaser	48.12	52	1-1/8	1
46	52.81	2.38	48.62	47.44	5.63	0.44	46.12	Specified by purchaser	50.56	40	1-1/4	1-1/8
48	54.81	2.50	50.75	49.50	5.82	0.44	48.12	Specified by purchaser	52.56	44	1-1/4	1-1/8
50	56.81	2.63	52.75	51.50	6.00	0.44	50.12	Specified by purchaser	54.56	48	1-1/4	1-1/8
52	58.81	2.69	54.75	53.56	6.13	0.44	52.12	Specified by purchaser	56.56	52	1-1/4	1-1/8
54	61.00	2.75	56.75	55.62	6.32	0.44	54.12	Specified by purchaser	58.75	56	1-1/4	1-1/8
56	63.00	2.82	58.75	57.69	6.50	0.56	56.12	Specified by purchaser	60.75	60	1-1/4	1-1/2
58	65.94	2.88	60.75	59.69	6.82	0.56	58.12	Specified by purchaser	63.44	48	1-3/8	1-1/4
60	67.94	2.94	63.00	61.81	7.00	0.56	60.12	Specified by purchaser	65.44	52	1-3/8	1-1/4

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	786	39.9	711	684	87	10	661.9	Specified by purchaser	744.5	36	7/8	3/4
28	837	42.9	762	735	94	10	712.7	Specified by purchaser	795.3	40	7/8	3/4
30	887	42.9	813	787	98	10	763.5	Specified by purchaser	846.1	44	7/8	3/4
32	941	44.4	864	840	106	10	814.3	Specified by purchaser	900.2	48	7/8	3/4
34	1005	47.8	921	892	109	10	865.1	Specified by purchaser	957.3	40	1	7/8
36	1057	50.8	972	945	116	10	915.9	Specified by purchaser	1009.6	44	1	7/8
38	1124	52.6	1022	997	122	10	968.2	Specified by purchaser	1069.8	40	1-1/8	1
40	1175	54.1	1080	1049	127	10	1019.0	Specified by purchaser	1120.6	44	1-1/8	1
42	1226	57.2	1130	1102	132	11	1069.8	Specified by purchaser	1171.4	48	1-1/8	1
44	1276	58.9	1181	1153	135	11	1120.6	Specified by purchaser	1222.2	52	1-1/8	1
46	1341	60.5	1235	1205	143	11	1171.4	Specified by purchaser	1284.2	40	1-1/4	1-1/8
48	1392	63.5	1289	1257	148	11	1222.2	Specified by purchaser	1335.0	44	1-1/4	1-1/8
50	1443	66.8	1340	1308	152	11	1273.0	Specified by purchaser	1385.8	48	1-1/4	1-1/8
52	1494	68.3	1391	1360	156	11	1323.8	Specified by purchaser	1436.6	52	1-1/4	1-1/8
54	1549	69.8	1441	1413	161	11	1374.6	Specified by purchaser	1492.2	56	1-1/4	1-1/8
56	1600	71.6	1492	1465	165	14	1425.4	Specified by purchaser	1543.0	60	1-1/4	1-1/8
58	1675	73.2	1543	1516	173	14	1476.2	Specified by purchaser	1611.4	48	1-3/8	1-1/4
60	1726	74.7	1600	1570	178	14	1527.0	Specified by purchaser	1662.2	52	1-3/8	1-1/4

Dimensions are based on ASME B16.47 Series B Class 150 flange requirements. Refer to the applicable standard for complete dimensional requirements.

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