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