Series B Flanges Dimensions

ASME B16.47 Series B Class 150 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	684	661.9	785	39.8 41.4	43 44.6	87 88.6
28	735	712.7	835	43 44.6	46.2 47.8	94 95.6
30	787	763.5	885	43 44.6	49.3 50.9	98 99.6
32	840	814.3	940	44.6 46.2	52.5 54.1	106 107.6
34	892	865.1	1005	47.7 49.3	55.7 57.3	109 110.6
36	945	915.9	1055	50.9 52.5	57.3 58.9	116 117.6
38	997	968.2	1125	52.5 54.1	62 63.6	122 123.6
40	1049	1019	1175	54.1 55.7	65.2 66.8	127 128.6
42	1102	1069.8	1225	57.3 58.9	66.8 68.4	132 133.6
44	1153	1120.6	1275	58.9 60.5	70 71.6	135 136.6
46	1205	1171.4	1340	60.4 62	73.1 74.7	143 144.6
48	1257	1222.2	1390	63.6 65.2	76.3 77.9	148 149.6
50	1308	1273	1445	66.8 68.4	79.5 81.1	152 153.6
52	1360	1323.8	1495	68.4 70	82.7 84.3	156 157.6
54	1413	1374.6	1550	70 71.6	85.8 87.4	160 161.6
56	1465	1425.4	1600	71.6 73.2	89 90.6	165 166.6
58	1516	1476.2	1675	73.1 74.7	91.9 93.5	173 174.6
60	1570	1527	1725	74.7 76.3	95.4 97	178 179.6

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	36	711	744.5	22.2	3/4	140
28	40	762	795.3	22.2	3/4	146
30	44	813	846.1	22.2	3/4	146
32	48	864	900.1	22.2	3/4	146
34	40	921	957.3	25.4	7/8	159
36	44	972	1009.6	25.4	7/8	165
38	40	1022	1070	28.6	1	178
40	44	1080	1120.8	28.6	1	178
42	48	1130	1171.6	28.6	1	184
44	52	1181	1222.4	28.6	1	190
46	40	1235	1284.3	31.8	1.1/8	203
48	44	1289	1335.1	31.8	1.1/8	203
50	48	1340	1385.9	31.8	1.1/8	210
52	52	1391	1436.7	31.8	1.1/8	216
54	56	1441	1492.2	31.8	1.1/8	216
56	60	1492	1543	31.8	1.1/8	222
58	48	1543	1611.3	34.9	1.1/4	229
60	52	1600	1662.1	34.9	1.1/4	235

ASME B16.47 Series B Class 300 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	702	665.2	865	87.4 89	87.4 89	168 169.6
28	756	716	920	87.4 89	87.4 89	148 149.6
30	813	768.4	990	92.1 93.7	92.1 93.7	156 157.6
32	864	819.2	1055	101.6 103.2	101.6 103.2	167 168.6
34	918	870	1110	101.6 103.2	101.6 103.2	171 172.6
36	965	920.8	1170	101.6 103.2	101.6 103.2	179 180.6
38	1016	971.6	1220	109.6 111.2	109.6 111.2	190 191.6
40	1067	1022.4	1275	114.3 115.9	114.3 115.9	197 198.6
42	1118	1074.7	1335	117.5 119.1	117.5 119.1	203 204.6
44	1173	1125.5	1385	125.5 127.1	125.5 127.1	213 214.6
46	1229	1176.3	1460	127 128.6	128.6 130.2	221 222.6
48	1278	1227.1	1510	127 128.6	133.4 135	222 223.6
50	1330	1277.9	1560	136.6 138.2	138.2 139.8	233 234.6
52	1383	1328.7	1615	141.3 142.9	142.6 144.2	241 242.6
54	1435	1379.5	1675	135 136.6	147.7 149.3	238 239.6
56	1494	1430.3	1765	152.4 154	155.4 157	267 268.6
58	1548	1481.1	1825	152.4 154	160.4 162	273 274.6
60	1599	1557.3	1880	149.3 150.9	165.1 166.7	270 271.6

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	32	737	803.3	34.9	1.1/4	260
28	36	787	857.2	34.9	1.1/4	260
30	36	845	920.8	38.1	1.3/8	273
32	32	902	977.9	41.3	1.1/2	298
34	36	953	1031.9	41.3	1.1/2	298
36	32	1010	1089	44.5	1.3/8	305
38	36	1060	1139.8	44.5	1.3/8	324
40	40	1114	1190.6	44.5	1.5/8	330
42	36	1168	1244.6	47.6	1.3/4	343
44	40	1219	1295.4	47.6	1.3/4	362
46	36	1270	1365.2	50.8	1.7/8	368
48	40	1327	1416	50.8	1.7/8	368
50	44	1378	1466.8	50.8	1.7/8	387
52	48	1429	1517.6	50.8	1.7/8	400
54	48	1480	1578	50.8	1.7/8	387
56	36	1537	1651	60.3	2.1/4	438
58	40	1594	1712.9	60.3	2.1/4	438
60	40	1651	1763.7	60.3	2.1/4	432

ASME B16.47 Series B Class 400 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	698	660.4	850	88.9 95.25	98.5 104.85	149 155.35
28	740	711.2	915	95.3 101.65	104.8 111.15	159 165.35
30	794	762	970	101.6 107.95	111.2 117.55	170 176.35
32	845	812.8	1035	108 114.35	115.9 122.25	179 185.35
34	899	863.6	1085	111.2 117.55	122.3 128.65	187 193.35
36	952	914.4	1155	119.1 125.45	119.1 125.45	200 206.35
38	1003	965.2	1205	123.9 130.25	123.9 130.25	206 212.35
40	1054	1016	1270	130.2 136.55	130.2 136.55	216 222.35
42	1108	1066.8	1320	133.4 139.75	133.4 139.75	224 230.35
44	1159	1117.6	1385	139.7 146.05	139.7 146.05	233 239.35
46	1213	1168.4	1440	146.1 152.45	146.1 152.45	244 250.35
48	1267	1219.2	1510	152.4 158.75	152.4 158.75	257 263.35
50	1321	1270.2	1570	157.2 163.55	158.8 165.15	268 274.35
52	1372	1320.8	1620	162 168.35	163.6 169.95	276 282.35
54	1426	1371.6	1700	169.9 176.25	171.5 177.85	289 295.35
56	1480	1422.4	1755	174.7 181.05	176.3 182.65	298 304.35
58	1530	1473.2	1805	177.8 184.15	181 187.35	306 312.35
60	1584	1524	1885	185.8 192.15	189 195.35	319 325.35

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	28	711	781	38.1	1.3/8	279
28	24	762	838.2	41.3	1.1/2	298
30	28	819	895.4	41.3	1.1/2	311
32	28	873	952.5	44.5	1.5/8	330
34	32	927	1003.3	44.5	1.5/8	337
36	28	981	1066.8	47.6	1.3/4	356
38	32	1035	1117.6	47.6	1.3/4	368
40	32	1092	1174.8	50.8	1.7/8	387
42	32	1143	1225.6	50.8	1.7/8	394
44	32	1200	1282.7	54	2	413
46	36	1257	1339.8	54	2	425
48	28	1308	1403.4	60.3	2.1/4	451
50	32	1362	1460.5	60.3	2.1/4	457
52	32	1413	1511.3	60.3	2.1/4	470
54	28	1470	1581.2	66.7	2.1/2	502
56	32	1527	1632	66.7	2.1/2	508
58	32	1578	1682.8	66.7	2.1/2	514
60	32	1635	1752.6	73	2.3/4	546

ASME B16.47 Series B Class 600 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	698	660.4	890	111.2 117.55	111.2 117.55	181 187.35
28	752	711.2	950	115.9 122.25	115.9 122.25	190 196.35
30	806	762	1020	125.5 131.85	127 133.35	205 211.35
32	860	812.8	1085	130.2 136.55	134.9 141.25	216 222.35
34	914	863.6	1160	141.3 147.65	144.2 150.55	233 239.35
36	968	914.4	1215	146.1 152.45	150.9 157.25	243 249.35
38	1022	965.2	1270	152.4 158.75	155 161.35	254 260.35
40	1073	1016	1320	158.8 165.15	162 168.35	264 270.35
42	1127	1066.8	1405	168.3 174.65	171.5 177.85	279 285.35
44	1181	1117.6	1455	173.1 179.45	177.8 184.15	289 295.35
46	1235	1168.4	1510	179.4 185.75	185.8 192.15	300 306.35
48	1289	1219.2	1595	189 195.35	195.3 201.65	316 322.35
50	1343	1270.2	1670	196.9 203.25	203.2 209.55	329 335.35
52	1394	1320.8	1720	203.2 209.55	209.6 215.95	337 343.35
54	1448	1371.6	1780	209.6 215.95	217.5 223.85	349 355.35
56	1502	1422.4	1855	217.4 223.75	225.5 231.85	362 368.35
58	1553	1473.2	1905	222.3 228.65	231.8 238.15	370 376.35
60	1610	1524	1995	233.4 239.75	242.9 249.25	389 395.35

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	28	727	806.4	44.5	1.5/8	337
28	28	784	863.6	47.6	1.3/4	349
30	28	841	927.1	50.8	1.7/8	375
32	28	895	984.2	54	2	394
34	24	953	1054.1	60.3	2.1/4	425
36	28	1010	1104.9	60.3	2.1/4	438
38	28	1054	1162	60.3	2.1/4	451
40	32	1111	1212.8	60.3	2.1/4	464
42	28	1168	1282.7	66.7	2.1/2	495
44	32	1226	1333.5	66.7	2.1/2	508
46	32	1276	1390.6	66.7	2.1/2	521
48	32	1334	1460.5	73	2.3/4	552
50	28	1384	1524	79.4	3	578
52	32	1435	1574.8	79.4	3	591
54	32	1492	1632	79.4	3	603
56	32	1543	1695.4	85.7	3.1/4	635
58	32	1600	1746.2	85.7	3.1/4	641
60	28	1657	1822.4	92.1	3.1/2	679

ASME B16.47 Series B Class 900 Weld Neck & Blind flanges Dimensions

NPS	A	OD	D	B (WNF)	B (BLF)	H
26	743	660.4	1020	135 141.35	154 160.35	259 265.35
28	797	711.2	1105	147.7 154.05	166.7 173.05	276 282.35
30	851	762	1180	155.6 161.95	176.1 182.45	289 295.35
32	908	812.8	1240	160.4 166.75	186 192.35	303 309.35
34	962	863.6	1315	171.5 177.85	195 201.35	319 325.35
36	1016	914.4	1345	173.1 179.45	201.7 208.05	325 331.35
38	1073	965.2	1460	190.5 196.85	215.9 222.25	352 358.35
40	1127	1016	1510	196.9 203.25	223.9 230.25	364 370.35
42	1176	1066.8	1560	206.4 212.75	231.8 238.15	371 377.35
44	1235	1117.6	1650	214.4 220.75	242.9 249.25	391 397.35
46	1292	1168.4	1735	225.6 231.95	255.6 261.95	411 417.35
48	1343	1219.2	1785	233.4 239.75	263.6 269.95	419 425.35

NPS	No of Bolts	G	K	L	Stud Bolt Dia x L
26	20	762	901.7	66.7	2.1/2	425
28	20	819	971.6	73	2.3/4	470
30	20	876	1035	79.4	3	495
32	20	927	1092.2	79.4	3	508
34	20	991	1155.7	85.7	3.1/4	540
36	24	1029	1200.2	79.4	3	533
38	20	1099	1289	92.1	3.1/2	591
40	24	1162	1339.8	92.1	3.1/2	603
42	24	1213	1390.6	92.1	3.1/2	622
44	24	1270	1463.7	98.4	3.3/4	654
46	24	1334	1536.7	104.8	4	686
48	24	1384	1587.5	104.8	4	705

A = Diameter at Base of Hub
G = Outside Diameter of Raised Face
K = Bolt Circle Diameter
L = Diameter of Bolt Holes
OD = Diameter at Weld Bevel
D = Overall Diameter of Flange
B (WNF) = Minimum Thickness of Welding Neck Flange
B (BLF) = Minimum Thickness of Blind Flange
H = Length thru Hub

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