ASME B16.47-2025, Series B · North America, Middle East
ASME B16.47 Series B flange dimensions — size chart and bolt patterns
ASME B16.47 Series B is the former API 605 large-diameter flange standard, covering NPS 26 to NPS 60 in classes 150 to 900. Its outside diameters are smaller than Series A for the same size and class, which makes it attractive where space or weight is constrained.
Series B is dimensionally different from Series A and from B16.5. Always quote the series explicitly, and check the mating flange before ordering — a Series B flange will not bolt to a Series A flange of the same nominal size. B16.47 covers weld-neck and blind flanges only, and Class 900 is published up to NPS 48.
Edition
ASME B16.47-2025, Series B
Sizes
26″–60″
Ratings
Class 150 · Class 300 · Class 400 · Class 600 · Class 900
Flange types
Weld Neck · Blind
Region
North America, Middle East
Size pages
168
Dimensions are in millimetres; ASME inch equivalents are shown in brackets. Bolt hole diameter is the through-hole and flange thickness excludes the raised-face height (1.5 mm for B16.47 Classes 75/150/300, 6.4 mm for Classes 400–900). Every size links to its own specification page with the material options, facing details and certification information. Raised face (RF) is standard: 1.5 mm high for Classes 75, 150 and 300; 6.4 mm for Classes 400, 600 and 900. FF and RTJ faces are available to drawing.
This page covers one series. For the outline comparison and the 2025 reference data, see the ASME B16.47 hub.
Edition note. Dimension values on this page have been checked against ASME B16.47-2025 (SI tables, cross-checked against the U.S. Customary tables). The 2025 edition prints exact metric equivalents of the inch dimensions rather than the old 5 mm-rounded values (for example 36.50 in is printed as 927 mm, not 925 mm), and defines flange thickness as excluding the raised face. Both corrections are reflected here; Series B NPS 38 and above follows Series A per the standard’s General Note (h).
Weld Neck Flanges — ASME B16.47 Series B
Weld Neck product page →Butt-weld large-diameter flange to the former API 605 outline; compact outside diameter for restricted deck and skid spaces.
ASME B16.47 Series B Class 150 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 786 mm (30.94″) | 39.9 mm (1.57″) | 711 mm (27.99″) | 744.5 mm (29.31″) | 36 × Ø22.2 mm (0.87″) | 684 mm (26.93″) | 87 mm (3.43″) | 54.4 kg | Details → |
| 28″ | 700 | 837 mm (32.95″) | 42.9 mm (1.69″) | 762 mm (30″) | 795.3 mm (31.31″) | 40 × Ø22.2 mm (0.87″) | 735 mm (28.94″) | 94 mm (3.7″) | 63.5 kg | Details → |
| 30″ | 750 | 887 mm (34.92″) | 42.9 mm (1.69″) | 813 mm (32.01″) | 846.1 mm (33.31″) | 44 × Ø22.2 mm (0.87″) | 787 mm (30.98″) | 98 mm (3.86″) | 68 kg | Details → |
| 32″ | 800 | 941 mm (37.05″) | 44.5 mm (1.75″) | 864 mm (34.02″) | 900.1 mm (35.44″) | 48 × Ø22.2 mm (0.87″) | 840 mm (33.07″) | 106 mm (4.17″) | 77.1 kg | Details → |
| 34″ | 850 | 1005 mm (39.57″) | 47.8 mm (1.88″) | 921 mm (36.26″) | 957.3 mm (37.69″) | 40 × Ø25.4 mm (1″) | 892 mm (35.12″) | 109 mm (4.29″) | 95.3 kg | Details → |
| 36″ | 900 | 1057 mm (41.61″) | 50.8 mm (2″) | 972 mm (38.27″) | 1009.6 mm (39.75″) | 44 × Ø25.4 mm (1″) | 945 mm (37.2″) | 116 mm (4.57″) | 109 kg | Details → |
| 38″ | 950 | 1124 mm (44.25″) | 52.6 mm (2.07″) | 1022 mm (40.24″) | 1069.8 mm (42.12″) | 40 × Ø28.6 mm (1.13″) | 997 mm (39.25″) | 122 mm (4.8″) | 132 kg | Details → |
| 40″ | 1000 | 1175 mm (46.26″) | 54 mm (2.13″) | 1080 mm (42.52″) | 1120.6 mm (44.12″) | 44 × Ø28.6 mm (1.13″) | 1049 mm (41.3″) | 127 mm (5″) | 141 kg | Details → |
| 42″ | 1050 | 1226 mm (48.27″) | 57.2 mm (2.25″) | 1130 mm (44.49″) | 1171.4 mm (46.12″) | 48 × Ø28.6 mm (1.13″) | 1102 mm (43.39″) | 132 mm (5.2″) | 156 kg | Details → |
| 44″ | 1100 | 1276 mm (50.24″) | 58.9 mm (2.32″) | 1181 mm (46.5″) | 1222.2 mm (48.12″) | 52 × Ø28.6 mm (1.13″) | 1153 mm (45.39″) | 135 mm (5.31″) | 141 kg | Details → |
| 46″ | 1150 | 1341 mm (52.8″) | 60.5 mm (2.38″) | 1235 mm (48.62″) | 1284.3 mm (50.56″) | 40 × Ø31.8 mm (1.25″) | 1205 mm (47.44″) | 143 mm (5.63″) | 197 kg | Details → |
| 48″ | 1200 | 1392 mm (54.8″) | 63.5 mm (2.5″) | 1289 mm (50.75″) | 1335.1 mm (52.56″) | 44 × Ø31.8 mm (1.25″) | 1257 mm (49.49″) | 148 mm (5.83″) | 218 kg | Details → |
| 50″ | 1250 | 1443 mm (56.81″) | 66.7 mm (2.63″) | 1340 mm (52.76″) | 1385.9 mm (54.56″) | 48 × Ø31.8 mm (1.25″) | 1308 mm (51.5″) | 152 mm (5.98″) | 236 kg | Details → |
| 52″ | 1300 | 1494 mm (58.82″) | 68.3 mm (2.69″) | 1391 mm (54.76″) | 1436.7 mm (56.56″) | 52 × Ø31.8 mm (1.25″) | 1360 mm (53.54″) | 156 mm (6.14″) | 236 kg | Details → |
| 54″ | 1350 | 1549 mm (60.98″) | 69.9 mm (2.75″) | 1441 mm (56.73″) | 1492.2 mm (58.75″) | 56 × Ø31.8 mm (1.25″) | 1413 mm (55.63″) | 161 mm (6.34″) | 281 kg | Details → |
| 56″ | 1400 | 1600 mm (62.99″) | 71.6 mm (2.82″) | 1492 mm (58.74″) | 1543 mm (60.75″) | 60 × Ø31.8 mm (1.25″) | 1465 mm (57.68″) | 165 mm (6.5″) | 295 kg | Details → |
| 58″ | 1450 | 1675 mm (65.94″) | 73.2 mm (2.88″) | 1543 mm (60.75″) | 1611.3 mm (63.44″) | 48 × Ø34.9 mm (1.37″) | 1516 mm (59.69″) | 173 mm (6.81″) | 354 kg | Details → |
| 60″ | 1500 | 1726 mm (67.95″) | 74.6 mm (2.94″) | 1600 mm (62.99″) | 1662.1 mm (65.44″) | 52 × Ø34.9 mm (1.37″) | 1570 mm (61.81″) | 178 mm (7.01″) | 386 kg | Details → |
18 sizes · ASME B16.47 Series B Class 150 · ASME B16.47-2025, Series B
ASME B16.47 Series B Class 300 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 867 mm (34.13″) | 87.3 mm (3.44″) | 737 mm (29.02″) | 803.1 mm (31.62″) | 32 × Ø34.9 mm (1.37″) | 702 mm (27.64″) | 143 mm (5.63″) | 181 kg | Details → |
| 28″ | 700 | 921 mm (36.26″) | 87.3 mm (3.44″) | 787 mm (30.98″) | 857.2 mm (33.75″) | 36 × Ø34.9 mm (1.37″) | 756 mm (29.76″) | 148 mm (5.83″) | 204 kg | Details → |
| 30″ | 750 | 991 mm (39.02″) | 92.1 mm (3.63″) | 845 mm (33.27″) | 920.8 mm (36.25″) | 36 × Ø38.1 mm (1.5″) | 813 mm (32.01″) | 156 mm (6.14″) | 249 kg | Details → |
| 32″ | 800 | 1054 mm (41.5″) | 101.6 mm (4″) | 902 mm (35.51″) | 977.9 mm (38.5″) | 32 × Ø41.3 mm (1.63″) | 864 mm (34.02″) | 167 mm (6.57″) | 311 kg | Details → |
| 34″ | 850 | 1108 mm (43.62″) | 101.6 mm (4″) | 952 mm (37.48″) | 1031.7 mm (40.62″) | 36 × Ø41.3 mm (1.63″) | 917 mm (36.1″) | 171 mm (6.73″) | 340 kg | Details → |
| 36″ | 900 | 1171 mm (46.1″) | 101.6 mm (4″) | 1010 mm (39.76″) | 1089.2 mm (42.88″) | 32 × Ø44.5 mm (1.75″) | 965 mm (37.99″) | 179 mm (7.05″) | 381 kg | Details → |
| 38″ | 950 | 1222 mm (48.11″) | 109.5 mm (4.31″) | 1060 mm (41.73″) | 1140 mm (44.88″) | 36 × Ø44.5 mm (1.75″) | 1016 mm (40″) | 190 mm (7.48″) | 415 kg | Details → |
| 40″ | 1000 | 1273 mm (50.12″) | 114.3 mm (4.5″) | 1115 mm (43.9″) | 1190.8 mm (46.88″) | 40 × Ø44.5 mm (1.75″) | 1067 mm (42.01″) | 197 mm (7.76″) | 449 kg | Details → |
| 42″ | 1050 | 1334 mm (52.52″) | 117.5 mm (4.63″) | 1168 mm (45.98″) | 1244.6 mm (49″) | 36 × Ø47.6 mm (1.87″) | 1118 mm (44.02″) | 203 mm (7.99″) | 515 kg | Details → |
| 44″ | 1100 | 1384 mm (54.49″) | 125.4 mm (4.94″) | 1219 mm (47.99″) | 1295.4 mm (51″) | 40 × Ø47.6 mm (1.87″) | 1173 mm (46.18″) | 213 mm (8.39″) | 560 kg | Details → |
| 46″ | 1150 | 1460 mm (57.48″) | 127 mm (5″) | 1270 mm (50″) | 1365.2 mm (53.75″) | 36 × Ø50.8 mm (2″) | 1229 mm (48.39″) | 221 mm (8.7″) | 667 kg | Details → |
| 48″ | 1200 | 1511 mm (59.49″) | 127 mm (5″) | 1327 mm (52.24″) | 1416 mm (55.75″) | 40 × Ø50.8 mm (2″) | 1278 mm (50.31″) | 222 mm (8.74″) | 714 kg | Details → |
| 50″ | 1250 | 1562 mm (61.5″) | 136.7 mm (5.38″) | 1378 mm (54.25″) | 1466.8 mm (57.75″) | 44 × Ø50.8 mm (2″) | 1330 mm (52.36″) | 233 mm (9.17″) | 776 kg | Details → |
| 52″ | 1300 | 1613 mm (63.5″) | 141.3 mm (5.56″) | 1429 mm (56.26″) | 1517.6 mm (59.75″) | 48 × Ø50.8 mm (2″) | 1383 mm (54.45″) | 241 mm (9.49″) | 835 kg | Details → |
| 54″ | 1350 | 1673 mm (65.87″) | 135.1 mm (5.32″) | 1480 mm (58.27″) | 1577.8 mm (62.12″) | 48 × Ø50.8 mm (2″) | 1435 mm (56.5″) | 238 mm (9.37″) | 898 kg | Details → |
| 56″ | 1400 | 1765 mm (69.49″) | 152.4 mm (6″) | 1537 mm (60.51″) | 1651 mm (65″) | 36 × Ø60.3 mm (2.37″) | 1494 mm (58.82″) | 267 mm (10.51″) | 1041 kg | Details → |
| 58″ | 1450 | 1827 mm (71.93″) | 152.4 mm (6″) | 1594 mm (62.76″) | 1712.9 mm (67.44″) | 40 × Ø60.3 mm (2.37″) | 1548 mm (60.94″) | 273 mm (10.75″) | 1256 kg | Details → |
| 60″ | 1500 | 1878 mm (73.94″) | 149.4 mm (5.88″) | 1651 mm (65″) | 1763.7 mm (69.44″) | 40 × Ø60.3 mm (2.37″) | 1599 mm (62.95″) | 270 mm (10.63″) | 1302 kg | Details → |
18 sizes · ASME B16.47 Series B Class 300 · ASME B16.47-2025, Series B
ASME B16.47 Series B Class 400 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 851 mm (33.5″) | 88.9 mm (3.5″) | 711 mm (27.99″) | 781 mm (30.75″) | 28 × Ø38.1 mm (1.5″) | 689 mm (27.13″) | 149 mm (5.87″) | 163 kg | Details → |
| 28″ | 700 | 914 mm (35.98″) | 95.3 mm (3.75″) | 762 mm (30″) | 838.2 mm (33″) | 24 × Ø41.3 mm (1.63″) | 740 mm (29.13″) | 159 mm (6.26″) | 204 kg | Details → |
| 30″ | 750 | 972 mm (38.27″) | 101.6 mm (4″) | 819 mm (32.24″) | 895.4 mm (35.25″) | 28 × Ø41.3 mm (1.63″) | 794 mm (31.26″) | 170 mm (6.69″) | 240 kg | Details → |
| 32″ | 800 | 1035 mm (40.75″) | 108 mm (4.25″) | 873 mm (34.37″) | 952.5 mm (37.5″) | 28 × Ø44.5 mm (1.75″) | 845 mm (33.27″) | 179 mm (7.05″) | 288 kg | Details → |
| 34″ | 850 | 1086 mm (42.76″) | 111.3 mm (4.38″) | 927 mm (36.5″) | 1003.3 mm (39.5″) | 32 × Ø44.5 mm (1.75″) | 899 mm (35.39″) | 187 mm (7.36″) | 313 kg | Details → |
| 36″ | 900 | 1156 mm (45.51″) | 119.1 mm (4.69″) | 981 mm (38.62″) | 1066.8 mm (42″) | 28 × Ø47.6 mm (1.87″) | 952 mm (37.48″) | 200 mm (7.87″) | 388 kg | Details → |
| 38″ | 950 | 1206 mm (47.48″) | 124 mm (4.88″) | 1035 mm (40.75″) | 1117.6 mm (44″) | 32 × Ø47.6 mm (1.87″) | 1003 mm (39.49″) | 206 mm (8.11″) | — | Details → |
| 40″ | 1000 | 1270 mm (50″) | 130 mm (5.12″) | 1092 mm (42.99″) | 1174.8 mm (46.25″) | 32 × Ø50.8 mm (2″) | 1054 mm (41.5″) | 216 mm (8.5″) | — | Details → |
| 42″ | 1050 | 1321 mm (52.01″) | 133.4 mm (5.25″) | 1143 mm (45″) | 1225.6 mm (48.25″) | 32 × Ø50.8 mm (2″) | 1108 mm (43.62″) | 224 mm (8.82″) | — | Details → |
| 44″ | 1100 | 1384 mm (54.49″) | 139.7 mm (5.5″) | 1200 mm (47.24″) | 1282.7 mm (50.5″) | 32 × Ø54 mm (2.13″) | 1159 mm (45.63″) | 233 mm (9.17″) | — | Details → |
| 46″ | 1150 | 1441 mm (56.73″) | 146.1 mm (5.75″) | 1257 mm (49.49″) | 1339.8 mm (52.75″) | 36 × Ø54 mm (2.13″) | 1213 mm (47.76″) | 244 mm (9.61″) | — | Details → |
| 48″ | 1200 | 1511 mm (59.49″) | 152.4 mm (6″) | 1308 mm (51.5″) | 1403.4 mm (55.25″) | 28 × Ø60.3 mm (2.37″) | 1267 mm (49.88″) | 257 mm (10.12″) | — | Details → |
| 50″ | 1250 | 1568 mm (61.73″) | 157.2 mm (6.19″) | 1362 mm (53.62″) | 1460.5 mm (57.5″) | 32 × Ø60.3 mm (2.37″) | 1321 mm (52.01″) | 268 mm (10.55″) | — | Details → |
| 52″ | 1300 | 1619 mm (63.74″) | 162.1 mm (6.38″) | 1413 mm (55.63″) | 1511.3 mm (59.5″) | 32 × Ø60.3 mm (2.37″) | 1372 mm (54.02″) | 276 mm (10.87″) | — | Details → |
| 54″ | 1350 | 1702 mm (67.01″) | 169.9 mm (6.69″) | 1470 mm (57.87″) | 1581.2 mm (62.25″) | 28 × Ø66.7 mm (2.63″) | 1425 mm (56.1″) | 289 mm (11.38″) | — | Details → |
| 56″ | 1400 | 1753 mm (69.02″) | 174.8 mm (6.88″) | 1527 mm (60.12″) | 1632 mm (64.25″) | 32 × Ø66.7 mm (2.63″) | 1480 mm (58.27″) | 298 mm (11.73″) | — | Details → |
| 58″ | 1450 | 1803 mm (70.98″) | 177.8 mm (7″) | 1578 mm (62.13″) | 1682.8 mm (66.25″) | 32 × Ø66.7 mm (2.63″) | 1530 mm (60.24″) | 306 mm (12.05″) | — | Details → |
| 60″ | 1500 | 1886 mm (74.25″) | 185.7 mm (7.31″) | 1635 mm (64.37″) | 1752.6 mm (69″) | 32 × Ø73 mm (2.87″) | 1584 mm (62.36″) | 319 mm (12.56″) | — | Details → |
18 sizes · ASME B16.47 Series B Class 400 · ASME B16.47-2025, Series B
ASME B16.47 Series B Class 600 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 889 mm (35″) | 111.3 mm (4.38″) | 727 mm (28.62″) | 806.4 mm (31.75″) | 28 × Ø44.5 mm (1.75″) | 698 mm (27.48″) | 181 mm (7.13″) | 249 kg | Details → |
| 28″ | 700 | 952 mm (37.48″) | 115.9 mm (4.56″) | 784 mm (30.87″) | 863.6 mm (34″) | 28 × Ø47.6 mm (1.87″) | 752 mm (29.61″) | 190 mm (7.48″) | 295 kg | Details → |
| 30″ | 750 | 1022 mm (40.24″) | 125.4 mm (4.94″) | 841 mm (33.11″) | 927.1 mm (36.5″) | 28 × Ø50.8 mm (2″) | 806 mm (31.73″) | 205 mm (8.07″) | 367 kg | Details → |
| 32″ | 800 | 1086 mm (42.76″) | 130 mm (5.12″) | 895 mm (35.24″) | 984.2 mm (38.75″) | 28 × Ø54 mm (2.13″) | 861 mm (33.9″) | 216 mm (8.5″) | 431 kg | Details → |
| 34″ | 850 | 1162 mm (45.75″) | 141.3 mm (5.56″) | 952 mm (37.48″) | 1054.1 mm (41.5″) | 24 × Ø60.3 mm (2.37″) | 914 mm (35.98″) | 233 mm (9.17″) | 547 kg | Details → |
| 36″ | 900 | 1213 mm (47.76″) | 146.1 mm (5.75″) | 1010 mm (39.76″) | 1104.9 mm (43.5″) | 28 × Ø60.3 mm (2.37″) | 968 mm (38.11″) | 243 mm (9.57″) | 608 kg | Details → |
| 38″ | 950 | 1270 mm (50″) | 152.4 mm (6″) | 1054 mm (41.5″) | 1162 mm (45.75″) | 28 × Ø60.3 mm (2.37″) | 1022 mm (40.24″) | 254 mm (10″) | — | Details → |
| 40″ | 1000 | 1321 mm (52.01″) | 158.8 mm (6.25″) | 1111 mm (43.74″) | 1212.8 mm (47.75″) | 32 × Ø60.3 mm (2.37″) | 1073 mm (42.24″) | 264 mm (10.39″) | — | Details → |
| 42″ | 1050 | 1403 mm (55.24″) | 168.1 mm (6.62″) | 1168 mm (45.98″) | 1282.7 mm (50.5″) | 28 × Ø66.7 mm (2.63″) | 1127 mm (44.37″) | 279 mm (10.98″) | — | Details → |
| 44″ | 1100 | 1454 mm (57.24″) | 173 mm (6.81″) | 1226 mm (48.27″) | 1333.5 mm (52.5″) | 32 × Ø66.7 mm (2.63″) | 1181 mm (46.5″) | 289 mm (11.38″) | — | Details → |
| 46″ | 1150 | 1511 mm (59.49″) | 179.4 mm (7.06″) | 1276 mm (50.24″) | 1390.6 mm (54.75″) | 32 × Ø66.7 mm (2.63″) | 1235 mm (48.62″) | 300 mm (11.81″) | — | Details → |
| 48″ | 1200 | 1594 mm (62.76″) | 188.9 mm (7.44″) | 1334 mm (52.52″) | 1460.5 mm (57.5″) | 32 × Ø73 mm (2.87″) | 1289 mm (50.75″) | 316 mm (12.44″) | — | Details → |
| 50″ | 1250 | 1670 mm (65.75″) | 196.9 mm (7.75″) | 1384 mm (54.49″) | 1524 mm (60″) | 28 × Ø79.4 mm (3.13″) | 1343 mm (52.87″) | 329 mm (12.95″) | — | Details → |
| 52″ | 1300 | 1721 mm (67.76″) | 203.2 mm (8″) | 1435 mm (56.5″) | 1574.8 mm (62″) | 32 × Ø79.4 mm (3.13″) | 1394 mm (54.88″) | 337 mm (13.27″) | — | Details → |
| 54″ | 1350 | 1778 mm (70″) | 209.6 mm (8.25″) | 1492 mm (58.74″) | 1632 mm (64.25″) | 32 × Ø79.4 mm (3.13″) | 1448 mm (57.01″) | 349 mm (13.74″) | — | Details → |
| 56″ | 1400 | 1854 mm (72.99″) | 217.5 mm (8.56″) | 1543 mm (60.75″) | 1695.4 mm (66.75″) | 32 × Ø85.7 mm (3.37″) | 1502 mm (59.13″) | 362 mm (14.25″) | — | Details → |
| 58″ | 1450 | 1905 mm (75″) | 222.3 mm (8.75″) | 1600 mm (62.99″) | 1746.2 mm (68.75″) | 32 × Ø85.7 mm (3.37″) | 1553 mm (61.14″) | 370 mm (14.57″) | — | Details → |
| 60″ | 1500 | 1994 mm (78.5″) | 233.4 mm (9.19″) | 1657 mm (65.24″) | 1822.4 mm (71.75″) | 28 × Ø92.1 mm (3.63″) | 1610 mm (63.39″) | 389 mm (15.31″) | — | Details → |
18 sizes · ASME B16.47 Series B Class 600 · ASME B16.47-2025, Series B
ASME B16.47 Series B Class 900 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1022 mm (40.24″) | 134.9 mm (5.31″) | 762 mm (30″) | 901.7 mm (35.5″) | 20 × Ø66.7 mm (2.63″) | 743 mm (29.25″) | 259 mm (10.2″) | 476 kg | Details → |
| 28″ | 700 | 1105 mm (43.5″) | 147.6 mm (5.81″) | 819 mm (32.24″) | 971.6 mm (38.25″) | 20 × Ø73 mm (2.87″) | 797 mm (31.38″) | 276 mm (10.87″) | 689 kg | Details → |
| 30″ | 750 | 1181 mm (46.5″) | 155.4 mm (6.12″) | 876 mm (34.49″) | 1035 mm (40.75″) | 20 × Ø79.4 mm (3.13″) | 851 mm (33.5″) | 289 mm (11.38″) | 826 kg | Details → |
| 32″ | 800 | 1238 mm (48.74″) | 160.3 mm (6.31″) | 927 mm (36.5″) | 1092.2 mm (43″) | 20 × Ø79.4 mm (3.13″) | 908 mm (35.75″) | 303 mm (11.93″) | 937 kg | Details → |
| 34″ | 850 | 1314 mm (51.73″) | 171.5 mm (6.75″) | 991 mm (39.02″) | 1155.7 mm (45.5″) | 20 × Ø85.7 mm (3.37″) | 962 mm (37.87″) | 319 mm (12.56″) | 1111 kg | Details → |
| 36″ | 900 | 1346 mm (52.99″) | 173 mm (6.81″) | 1029 mm (40.51″) | 1200.2 mm (47.25″) | 24 × Ø79.4 mm (3.13″) | 1016 mm (40″) | 325 mm (12.8″) | 1143 kg | Details → |
| 38″ | 950 | 1460 mm (57.48″) | 190.5 mm (7.5″) | 1099 mm (43.27″) | 1289 mm (50.75″) | 20 × Ø92.1 mm (3.63″) | 1073 mm (42.24″) | 353 mm (13.9″) | — | Details → |
| 40″ | 1000 | 1511 mm (59.49″) | 196.9 mm (7.75″) | 1162 mm (45.75″) | 1339.8 mm (52.75″) | 24 × Ø92.1 mm (3.63″) | 1127 mm (44.37″) | 363 mm (14.29″) | — | Details → |
| 42″ | 1050 | 1562 mm (61.5″) | 206.2 mm (8.12″) | 1213 mm (47.76″) | 1390.6 mm (54.75″) | 24 × Ø92.1 mm (3.63″) | 1176 mm (46.3″) | 371 mm (14.61″) | — | Details → |
| 44″ | 1100 | 1648 mm (64.88″) | 214.3 mm (8.44″) | 1270 mm (50″) | 1463.5 mm (57.62″) | 24 × Ø98.4 mm (3.87″) | 1235 mm (48.62″) | 391 mm (15.39″) | — | Details → |
| 46″ | 1150 | 1734 mm (68.27″) | 225.6 mm (8.88″) | 1334 mm (52.52″) | 1536.7 mm (60.5″) | 24 × Ø104.8 mm (4.13″) | 1292 mm (50.87″) | 411 mm (16.18″) | — | Details → |
| 48″ | 1200 | 1784 mm (70.24″) | 233.4 mm (9.19″) | 1384 mm (54.49″) | 1587.5 mm (62.5″) | 24 × Ø104.8 mm (4.13″) | 1343 mm (52.87″) | 419 mm (16.5″) | — | Details → |
12 sizes · ASME B16.47 Series B Class 900 · ASME B16.47-2025, Series B
Blind Flanges — ASME B16.47 Series B
Blind product page →Large blind to the API 605 outline for isolation and test ends.
ASME B16.47 Series B Class 150 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 786 mm (30.94″) | 42.9 mm (1.69″) | 711 mm (27.99″) | 744.5 mm (29.31″) | 36 × Ø22.2 mm (0.87″) | 170 kg | Details → |
| 28″ | 700 | 837 mm (32.95″) | 46.2 mm (1.82″) | 762 mm (30″) | 795.3 mm (31.31″) | 40 × Ø22.2 mm (0.87″) | 206 kg | Details → |
| 30″ | 750 | 887 mm (34.92″) | 49.2 mm (1.94″) | 813 mm (32.01″) | 846.1 mm (33.31″) | 44 × Ø22.2 mm (0.87″) | 247 kg | Details → |
| 32″ | 800 | 941 mm (37.05″) | 52.6 mm (2.07″) | 864 mm (34.02″) | 900.1 mm (35.44″) | 48 × Ø22.2 mm (0.87″) | 294 kg | Details → |
| 34″ | 850 | 1005 mm (39.57″) | 55.6 mm (2.19″) | 921 mm (36.26″) | 957.3 mm (37.69″) | 40 × Ø25.4 mm (1″) | 355 kg | Details → |
| 36″ | 900 | 1057 mm (41.61″) | 57.2 mm (2.25″) | 972 mm (38.27″) | 1009.6 mm (39.75″) | 44 × Ø25.4 mm (1″) | 404 kg | Details → |
| 38″ | 950 | 1124 mm (44.25″) | 61.9 mm (2.44″) | 1022 mm (40.24″) | 1069.8 mm (42.12″) | 40 × Ø28.6 mm (1.13″) | 494 kg | Details → |
| 40″ | 1000 | 1175 mm (46.26″) | 65.3 mm (2.57″) | 1080 mm (42.52″) | 1120.6 mm (44.12″) | 44 × Ø28.6 mm (1.13″) | 566 kg | Details → |
| 42″ | 1050 | 1226 mm (48.27″) | 66.7 mm (2.63″) | 1130 mm (44.49″) | 1171.4 mm (46.12″) | 48 × Ø28.6 mm (1.13″) | 632 kg | Details → |
| 44″ | 1100 | 1276 mm (50.24″) | 69.9 mm (2.75″) | 1181 mm (46.5″) | 1222.2 mm (48.12″) | 52 × Ø28.6 mm (1.13″) | 716 kg | Details → |
| 46″ | 1150 | 1341 mm (52.8″) | 73.2 mm (2.88″) | 1235 mm (48.62″) | 1284.3 mm (50.56″) | 40 × Ø31.8 mm (1.25″) | 828 kg | Details → |
| 48″ | 1200 | 1392 mm (54.8″) | 76.2 mm (3″) | 1289 mm (50.75″) | 1335.1 mm (52.56″) | 44 × Ø31.8 mm (1.25″) | 928 kg | Details → |
| 50″ | 1250 | 1443 mm (56.81″) | 79.4 mm (3.13″) | 1340 mm (52.76″) | 1385.9 mm (54.56″) | 48 × Ø31.8 mm (1.25″) | 1036 kg | Details → |
| 52″ | 1300 | 1494 mm (58.82″) | 82.6 mm (3.25″) | 1391 mm (54.76″) | 1436.7 mm (56.56″) | 52 × Ø31.8 mm (1.25″) | 1155 kg | Details → |
| 54″ | 1350 | 1549 mm (60.98″) | 85.9 mm (3.38″) | 1441 mm (56.73″) | 1492.2 mm (58.75″) | 56 × Ø31.8 mm (1.25″) | 1292 kg | Details → |
| 56″ | 1400 | 1600 mm (62.99″) | 88.9 mm (3.5″) | 1492 mm (58.74″) | 1543 mm (60.75″) | 60 × Ø31.8 mm (1.25″) | 1427 kg | Details → |
| 58″ | 1450 | 1675 mm (65.94″) | 91.9 mm (3.62″) | 1543 mm (60.75″) | 1611.3 mm (63.44″) | 48 × Ø34.9 mm (1.37″) | 1615 kg | Details → |
| 60″ | 1500 | 1726 mm (67.95″) | 95.3 mm (3.75″) | 1600 mm (62.99″) | 1662.1 mm (65.44″) | 52 × Ø34.9 mm (1.37″) | 1775 kg | Details → |
18 sizes · ASME B16.47 Series B Class 150 · ASME B16.47-2025, Series B
ASME B16.47 Series B Class 300 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 867 mm (34.13″) | 87.3 mm (3.44″) | 737 mm (29.02″) | 803.1 mm (31.62″) | 32 × Ø34.9 mm (1.37″) | 411 kg | Details → |
| 28″ | 700 | 921 mm (36.26″) | 87.3 mm (3.44″) | 787 mm (30.98″) | 857.2 mm (33.75″) | 36 × Ø34.9 mm (1.37″) | 464 kg | Details → |
| 30″ | 750 | 991 mm (39.02″) | 92.1 mm (3.63″) | 845 mm (33.27″) | 920.8 mm (36.25″) | 36 × Ø38.1 mm (1.5″) | 567 kg | Details → |
| 32″ | 800 | 1054 mm (41.5″) | 101.6 mm (4″) | 902 mm (35.51″) | 977.9 mm (38.5″) | 32 × Ø41.3 mm (1.63″) | 706 kg | Details → |
| 34″ | 850 | 1108 mm (43.62″) | 101.6 mm (4″) | 952 mm (37.48″) | 1031.7 mm (40.62″) | 36 × Ø41.3 mm (1.63″) | 780 kg | Details → |
| 36″ | 900 | 1171 mm (46.1″) | 101.6 mm (4″) | 1010 mm (39.76″) | 1089.2 mm (42.88″) | 32 × Ø44.5 mm (1.75″) | 871 kg | Details → |
| 38″ | 950 | 1222 mm (48.11″) | 109.5 mm (4.31″) | 1060 mm (41.73″) | 1140 mm (44.88″) | 36 × Ø44.5 mm (1.75″) | 1024 kg | Details → |
| 40″ | 1000 | 1273 mm (50.12″) | 114.3 mm (4.5″) | 1115 mm (43.9″) | 1190.8 mm (46.88″) | 40 × Ø44.5 mm (1.75″) | 1157 kg | Details → |
| 42″ | 1050 | 1334 mm (52.52″) | 117.5 mm (4.63″) | 1168 mm (45.98″) | 1244.6 mm (49″) | 36 × Ø47.6 mm (1.87″) | 1304 kg | Details → |
| 44″ | 1100 | 1384 mm (54.49″) | 125.4 mm (4.94″) | 1219 mm (47.99″) | 1295.4 mm (51″) | 40 × Ø47.6 mm (1.87″) | 1499 kg | Details → |
| 46″ | 1150 | 1460 mm (57.48″) | 128.6 mm (5.06″) | 1270 mm (50″) | 1365.2 mm (53.75″) | 36 × Ø50.8 mm (2″) | 1708 kg | Details → |
| 48″ | 1200 | 1511 mm (59.49″) | 133.4 mm (5.25″) | 1327 mm (52.24″) | 1416 mm (55.75″) | 40 × Ø50.8 mm (2″) | 1897 kg | Details → |
| 50″ | 1250 | 1562 mm (61.5″) | 138.1 mm (5.44″) | 1378 mm (54.25″) | 1466.8 mm (57.75″) | 44 × Ø50.8 mm (2″) | 2100 kg | Details → |
| 52″ | 1300 | 1613 mm (63.5″) | 142.5 mm (5.61″) | 1429 mm (56.26″) | 1517.6 mm (59.75″) | 48 × Ø50.8 mm (2″) | 2312 kg | Details → |
| 54″ | 1350 | 1673 mm (65.87″) | 147.6 mm (5.81″) | 1480 mm (58.27″) | 1577.8 mm (62.12″) | 48 × Ø50.8 mm (2″) | 2576 kg | Details → |
| 56″ | 1400 | 1765 mm (69.49″) | 155.4 mm (6.12″) | 1537 mm (60.51″) | 1651 mm (65″) | 36 × Ø60.3 mm (2.37″) | 3013 kg | Details → |
| 58″ | 1450 | 1827 mm (71.93″) | 160.3 mm (6.31″) | 1594 mm (62.76″) | 1712.9 mm (67.44″) | 40 × Ø60.3 mm (2.37″) | 3333 kg | Details → |
| 60″ | 1500 | 1878 mm (73.94″) | 165.1 mm (6.5″) | 1651 mm (65″) | 1763.7 mm (69.44″) | 40 × Ø60.3 mm (2.37″) | 3620 kg | Details → |
18 sizes · ASME B16.47 Series B Class 300 · ASME B16.47-2025, Series B
ASME B16.47 Series B Class 400 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 851 mm (33.5″) | 88.9 mm (3.5″) | 711 mm (27.99″) | 781 mm (30.75″) | 28 × Ø38.1 mm (1.5″) | 397 kg | Details → |
| 28″ | 700 | 914 mm (35.98″) | 95.3 mm (3.75″) | 762 mm (30″) | 838.2 mm (33″) | 24 × Ø41.3 mm (1.63″) | 490 kg | Details → |
| 30″ | 750 | 972 mm (38.27″) | 101.6 mm (4″) | 819 mm (32.24″) | 895.4 mm (35.25″) | 28 × Ø41.3 mm (1.63″) | 591 kg | Details → |
| 32″ | 800 | 1035 mm (40.75″) | 108 mm (4.25″) | 873 mm (34.37″) | 952.5 mm (37.5″) | 28 × Ø44.5 mm (1.75″) | 712 kg | Details → |
| 34″ | 850 | 1086 mm (42.76″) | 111.3 mm (4.38″) | 927 mm (36.5″) | 1003.3 mm (39.5″) | 32 × Ø44.5 mm (1.75″) | 807 kg | Details → |
| 36″ | 900 | 1156 mm (45.51″) | 119.1 mm (4.69″) | 981 mm (38.62″) | 1066.8 mm (42″) | 28 × Ø47.6 mm (1.87″) | 980 kg | Details → |
| 38″ | 950 | 1206 mm (47.48″) | 124 mm (4.88″) | 1035 mm (40.75″) | 1117.6 mm (44″) | 32 × Ø47.6 mm (1.87″) | — | Details → |
| 40″ | 1000 | 1270 mm (50″) | 130 mm (5.12″) | 1092 mm (42.99″) | 1174.8 mm (46.25″) | 32 × Ø50.8 mm (2″) | — | Details → |
| 42″ | 1050 | 1321 mm (52.01″) | 133.4 mm (5.25″) | 1143 mm (45″) | 1225.6 mm (48.25″) | 32 × Ø50.8 mm (2″) | — | Details → |
| 44″ | 1100 | 1384 mm (54.49″) | 139.7 mm (5.5″) | 1200 mm (47.24″) | 1282.7 mm (50.5″) | 32 × Ø54 mm (2.13″) | — | Details → |
| 46″ | 1150 | 1441 mm (56.73″) | 146.1 mm (5.75″) | 1257 mm (49.49″) | 1339.8 mm (52.75″) | 36 × Ø54 mm (2.13″) | — | Details → |
| 48″ | 1200 | 1511 mm (59.49″) | 152.4 mm (6″) | 1308 mm (51.5″) | 1403.4 mm (55.25″) | 28 × Ø60.3 mm (2.37″) | — | Details → |
| 50″ | 1250 | 1568 mm (61.73″) | 158.8 mm (6.25″) | 1362 mm (53.62″) | 1460.5 mm (57.5″) | 32 × Ø60.3 mm (2.37″) | — | Details → |
| 52″ | 1300 | 1619 mm (63.74″) | 163.5 mm (6.44″) | 1413 mm (55.63″) | 1511.3 mm (59.5″) | 32 × Ø60.3 mm (2.37″) | — | Details → |
| 54″ | 1350 | 1702 mm (67.01″) | 171.5 mm (6.75″) | 1470 mm (57.87″) | 1581.2 mm (62.25″) | 28 × Ø66.7 mm (2.63″) | — | Details → |
| 56″ | 1400 | 1753 mm (69.02″) | 176.2 mm (6.94″) | 1527 mm (60.12″) | 1632 mm (64.25″) | 32 × Ø66.7 mm (2.63″) | — | Details → |
| 58″ | 1450 | 1803 mm (70.98″) | 180.8 mm (7.12″) | 1578 mm (62.13″) | 1682.8 mm (66.25″) | 32 × Ø66.7 mm (2.63″) | — | Details → |
| 60″ | 1500 | 1886 mm (74.25″) | 188.9 mm (7.44″) | 1635 mm (64.37″) | 1752.6 mm (69″) | 32 × Ø73 mm (2.87″) | — | Details → |
18 sizes · ASME B16.47 Series B Class 400 · ASME B16.47-2025, Series B
ASME B16.47 Series B Class 600 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 889 mm (35″) | 111.3 mm (4.38″) | 727 mm (28.62″) | 806.4 mm (31.75″) | 28 × Ø44.5 mm (1.75″) | 542 kg | Details → |
| 28″ | 700 | 952 mm (37.48″) | 115.9 mm (4.56″) | 784 mm (30.87″) | 863.6 mm (34″) | 28 × Ø47.6 mm (1.87″) | 647 kg | Details → |
| 30″ | 750 | 1022 mm (40.24″) | 127 mm (5″) | 841 mm (33.11″) | 927.1 mm (36.5″) | 28 × Ø50.8 mm (2″) | 816 kg | Details → |
| 32″ | 800 | 1086 mm (42.76″) | 134.9 mm (5.31″) | 895 mm (35.24″) | 984.2 mm (38.75″) | 28 × Ø54 mm (2.13″) | 980 kg | Details → |
| 34″ | 850 | 1162 mm (45.75″) | 144.3 mm (5.68″) | 952 mm (37.48″) | 1054.1 mm (41.5″) | 24 × Ø60.3 mm (2.37″) | 1200 kg | Details → |
| 36″ | 900 | 1213 mm (47.76″) | 150.8 mm (5.94″) | 1010 mm (39.76″) | 1104.9 mm (43.5″) | 28 × Ø60.3 mm (2.37″) | 1367 kg | Details → |
| 38″ | 950 | 1270 mm (50″) | 155.4 mm (6.12″) | 1054 mm (41.5″) | 1162 mm (45.75″) | 28 × Ø60.3 mm (2.37″) | — | Details → |
| 40″ | 1000 | 1321 mm (52.01″) | 162.1 mm (6.38″) | 1111 mm (43.74″) | 1212.8 mm (47.75″) | 32 × Ø60.3 mm (2.37″) | — | Details → |
| 42″ | 1050 | 1403 mm (55.24″) | 171.5 mm (6.75″) | 1168 mm (45.98″) | 1282.7 mm (50.5″) | 28 × Ø66.7 mm (2.63″) | — | Details → |
| 44″ | 1100 | 1454 mm (57.24″) | 177.8 mm (7″) | 1226 mm (48.27″) | 1333.5 mm (52.5″) | 32 × Ø66.7 mm (2.63″) | — | Details → |
| 46″ | 1150 | 1511 mm (59.49″) | 185.7 mm (7.31″) | 1276 mm (50.24″) | 1390.6 mm (54.75″) | 32 × Ø66.7 mm (2.63″) | — | Details → |
| 48″ | 1200 | 1594 mm (62.76″) | 195.3 mm (7.69″) | 1334 mm (52.52″) | 1460.5 mm (57.5″) | 32 × Ø73 mm (2.87″) | — | Details → |
| 50″ | 1250 | 1670 mm (65.75″) | 203.2 mm (8″) | 1384 mm (54.49″) | 1524 mm (60″) | 28 × Ø79.4 mm (3.13″) | — | Details → |
| 52″ | 1300 | 1721 mm (67.76″) | 209.6 mm (8.25″) | 1435 mm (56.5″) | 1574.8 mm (62″) | 32 × Ø79.4 mm (3.13″) | — | Details → |
| 54″ | 1350 | 1778 mm (70″) | 217.5 mm (8.56″) | 1492 mm (58.74″) | 1632 mm (64.25″) | 32 × Ø79.4 mm (3.13″) | — | Details → |
| 56″ | 1400 | 1854 mm (72.99″) | 225.6 mm (8.88″) | 1543 mm (60.75″) | 1695.4 mm (66.75″) | 32 × Ø85.7 mm (3.37″) | — | Details → |
| 58″ | 1450 | 1905 mm (75″) | 231.6 mm (9.12″) | 1600 mm (62.99″) | 1746.2 mm (68.75″) | 32 × Ø85.7 mm (3.37″) | — | Details → |
| 60″ | 1500 | 1994 mm (78.5″) | 242.9 mm (9.56″) | 1657 mm (65.24″) | 1822.4 mm (71.75″) | 28 × Ø92.1 mm (3.63″) | — | Details → |
18 sizes · ASME B16.47 Series B Class 600 · ASME B16.47-2025, Series B
ASME B16.47 Series B Class 900 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1022 mm (40.24″) | 154 mm (6.06″) | 762 mm (30″) | 901.7 mm (35.5″) | 20 × Ø66.7 mm (2.63″) | 991 kg | Details → |
| 28″ | 700 | 1105 mm (43.5″) | 166.7 mm (6.56″) | 819 mm (32.24″) | 971.6 mm (38.25″) | 20 × Ø73 mm (2.87″) | 1253 kg | Details → |
| 30″ | 750 | 1181 mm (46.5″) | 176 mm (6.93″) | 876 mm (34.49″) | 1035 mm (40.75″) | 20 × Ø79.4 mm (3.13″) | 1512 kg | Details → |
| 32″ | 800 | 1238 mm (48.74″) | 185.7 mm (7.31″) | 927 mm (36.5″) | 1092.2 mm (43″) | 20 × Ø79.4 mm (3.13″) | 1753 kg | Details → |
| 34″ | 850 | 1314 mm (51.73″) | 195 mm (7.68″) | 991 mm (39.02″) | 1155.7 mm (45.5″) | 20 × Ø85.7 mm (3.37″) | 2075 kg | Details → |
| 36″ | 900 | 1346 mm (52.99″) | 201.6 mm (7.94″) | 1029 mm (40.51″) | 1200.2 mm (47.25″) | 24 × Ø79.4 mm (3.13″) | 2251 kg | Details → |
| 38″ | 950 | 1460 mm (57.48″) | 215.9 mm (8.5″) | 1099 mm (43.27″) | 1289 mm (50.75″) | 20 × Ø92.1 mm (3.63″) | — | Details → |
| 40″ | 1000 | 1511 mm (59.49″) | 223.8 mm (8.81″) | 1162 mm (45.75″) | 1339.8 mm (52.75″) | 24 × Ø92.1 mm (3.63″) | — | Details → |
| 42″ | 1050 | 1562 mm (61.5″) | 231.6 mm (9.12″) | 1213 mm (47.76″) | 1390.6 mm (54.75″) | 24 × Ø92.1 mm (3.63″) | — | Details → |
| 44″ | 1100 | 1648 mm (64.88″) | 242.9 mm (9.56″) | 1270 mm (50″) | 1463.5 mm (57.62″) | 24 × Ø98.4 mm (3.87″) | — | Details → |
| 46″ | 1150 | 1734 mm (68.27″) | 255.6 mm (10.06″) | 1334 mm (52.52″) | 1536.7 mm (60.5″) | 24 × Ø104.8 mm (4.13″) | — | Details → |
| 48″ | 1200 | 1784 mm (70.24″) | 263.5 mm (10.37″) | 1384 mm (54.49″) | 1587.5 mm (62.5″) | 24 × Ø104.8 mm (4.13″) | — | Details → |
12 sizes · ASME B16.47 Series B Class 900 · ASME B16.47-2025, Series B
Matching the rest of the joint
A flange is only one part of the joint. The gasket, stud bolts and nuts must be selected to the same standard and facing, and the mating flange must be dimensionally identical. Raised face (RF) is standard: 1.5 mm high for Classes 75, 150 and 300; 6.4 mm for Classes 400, 600 and 900. FF and RTJ faces are available to drawing.
ASME B16.47 Series B flanges are not interchangeable with other standard families — even where the nominal size and pressure rating look equivalent. Compare the bolt circle and bolt count before ordering, or read the standards comparison guide.