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ASME B16.47 Series B
Class 600 Weld Neck

ASME B16.47 Series B Class 600 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	35.00	4.38	28.62	27.50	7.12	0.50	26.00	Specified by purchaser	31.75	28	1-3/4	1-5/8
28	37.50	4.56	30.88	29.62	7.50	0.50	28.00	Specified by purchaser	34.00	28	1-7/8	1-3/4
30	40.25	4.94	33.12	31.75	8.06	0.50	30.00	Specified by purchaser	36.50	28	2	1-7/8
32	42.75	5.12	35.25	33.88	8.50	0.50	32.00	Specified by purchaser	38.75	28	2-1/8	2
34	45.75	5.56	37.50	36.00	9.19	0.56	34.00	Specified by purchaser	41.50	24	2-3/8	2-1/4
36	47.75	5.75	39.75	38.12	9.56	0.56	36.00	Specified by purchaser	43.50	28	2-3/8	2-1/4
38	1270	152.4	1054	1022	254	14	965.2	Specified by purchaser	1162.0	28	2-3/8	2-1/4
40	1321	158.8	1111	1073	264	14	1016.0	Specified by purchaser	1212.8	32	2-3/8	2-1/4
42	1403	168.1	1168	1127	279	14	1066.8	Specified by purchaser	1282.7	28	2-5/8	2-1/2
44	1454	173.0	1226	1181	289	14	1117.6	Specified by purchaser	1333.5	32	2-5/8	2-1/2
46	1511	179.3	1276	1235	300	14	1168.4	Specified by purchaser	1390.6	32	2-5/8	2-1/2
48	1594	189.0	1334	1289	316	14	1219.2	Specified by purchaser	1460.5	32	2-7/8	2-3/4
50	1670	196.8	1384	1343	329	14	1270.0	Specified by purchaser	1524.0	28	3-1/8	3
52	1721	203.2	1435	1394	337	14	1320.8	Specified by purchaser	1574.8	32	3-1/8	3
54	1778	209.6	1492	1448	349	14	1371.6	Specified by purchaser	1632.0	32	3-1/8	3
56	1854	217.4	1543	1502	362	16	1422.4	Specified by purchaser	1695.4	32	3-3/8	3-1/4
58	1905	222.2	1600	1553	370	16	1473.2	Specified by purchaser	1746.2	32	3-3/8	3-1/4
60	1994	233.4	1657	1610	389	17	1524.0	Specified by purchaser	1822.4	28	3-5/8	3-1/2

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	889	111.3	727	698	181	13	660.4	Specified by purchaser	806.4	28	1-3/4	1-5/8
28	952	115.8	784	752	190	13	711.2	Specified by purchaser	863.6	28	1-7/8	1-3/4
30	1022	125.5	841	806	205	13	762.0	Specified by purchaser	927.1	28	2	1-7/8
32	1086	130.0	895	861	216	13	812.8	Specified by purchaser	984.2	28	2-1/8	2
34	1162	141.2	952	914	233	14	863.6	Specified by purchaser	1054.1	24	2-3/8	2-1/4
36	1213	146.0	1010	968	243	14	914.4	Specified by purchaser	1104.9	28	2-3/8	2-1/4
38	1270	152.4	1054	1022	254	14	965.2	Specified by purchaser	1162.0	28	2-3/8	2-1/4
40	1321	158.8	1111	1073	264	14	1016.0	Specified by purchaser	1212.8	32	2-3/8	2-1/4
42	1403	168.1	1168	1127	279	14	1066.8	Specified by purchaser	1282.7	28	2-5/8	2-1/2
44	1454	173.0	1226	1181	289	14	1117.6	Specified by purchaser	1333.5	32	2-5/8	2-1/2
46	1511	179.3	1276	1235	300	14	1168.4	Specified by purchaser	1390.6	32	2-5/8	2-1/2
48	1594	189.0	1334	1289	316	14	1219.2	Specified by purchaser	1460.5	32	2-7/8	2-3/4
50	1670	196.8	1384	1343	329	14	1270.0	Specified by purchaser	1524.0	28	3-1/8	3
52	1721	203.2	1435	1394	337	14	1320.8	Specified by purchaser	1574.8	32	3-1/8	3
54	1778	209.6	1492	1448	349	14	1371.6	Specified by purchaser	1632.0	32	3-1/8	3
56	1854	217.4	1543	1502	362	16	1422.4	Specified by purchaser	1695.4	32	3-3/8	3-1/4
58	1905	222.2	1600	1553	370	16	1473.2	Specified by purchaser	1746.2	32	3-3/8	3-1/4
60	1994	233.4	1657	1610	389	17	1524.0	Specified by purchaser	1822.4	28	3-5/8	3-1/2

Dimensions are based on ASME B16.47 Series B Class 600 flange requirements. Refer to the applicable standard for complete dimensional requirements.

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