ASME B16.47-2025, Series A · North America, Middle East
ASME B16.47 Series A flange dimensions — size chart and bolt patterns
ASME B16.47 covers large-diameter flanges from NPS 26 to NPS 60. Series A preserves the former MSS SP-44 dimensions and is the series most often specified for large-bore oil and gas, water and process piping.
Series A and Series B use different outside diameters and bolt patterns for the same size and class, so the series must be stated on the purchase order. A Series A flange will not bolt to a Series B flange, and neither will bolt to an ASME B16.5 flange of the same nominal size. B16.47 covers weld-neck and blind flanges only — slip-on flanges above NPS 24 are made to drawing — and Class 900 is published up to NPS 48.
Edition
ASME B16.47-2025, Series A
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. Flat face (FF) and ring-type joint (RTJ) faces are available against the 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 A
Weld Neck product page →Butt-weld large-diameter flange with a long tapered hub; used on transmission lines, vessel nozzles and high-integrity large-bore piping.
ASME B16.47 Series A Class 150 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 870 mm (34.25″) | 66.8 mm (2.63″) | 749 mm (29.49″) | 806.4 mm (31.75″) | 24 × Ø34.9 mm (1.37″) | 676 mm (26.61″) | 119 mm (4.69″) | 136 kg | Details → |
| 28″ | 700 | 927 mm (36.5″) | 69.8 mm (2.75″) | 800 mm (31.5″) | 863.6 mm (34″) | 28 × Ø34.9 mm (1.37″) | 727 mm (28.62″) | 124 mm (4.88″) | 156 kg | Details → |
| 30″ | 750 | 984 mm (38.74″) | 73.2 mm (2.88″) | 857 mm (33.74″) | 914.4 mm (36″) | 28 × Ø34.9 mm (1.37″) | 781 mm (30.75″) | 135 mm (5.31″) | 181 kg | Details → |
| 32″ | 800 | 1060 mm (41.73″) | 79.5 mm (3.13″) | 914 mm (35.98″) | 977.9 mm (38.5″) | 28 × Ø41.3 mm (1.63″) | 832 mm (32.76″) | 143 mm (5.63″) | 229 kg | Details → |
| 34″ | 850 | 1111 mm (43.74″) | 81 mm (3.19″) | 965 mm (37.99″) | 1028.7 mm (40.5″) | 32 × Ø41.3 mm (1.63″) | 883 mm (34.76″) | 148 mm (5.83″) | 245 kg | Details → |
| 36″ | 900 | 1168 mm (45.98″) | 88.9 mm (3.5″) | 1022 mm (40.24″) | 1085.8 mm (42.75″) | 32 × Ø41.3 mm (1.63″) | 933 mm (36.73″) | 156 mm (6.14″) | 290 kg | Details → |
| 38″ | 950 | 1238 mm (48.74″) | 85.9 mm (3.38″) | 1073 mm (42.24″) | 1149.4 mm (45.25″) | 32 × Ø41.3 mm (1.63″) | 991 mm (39.02″) | 156 mm (6.14″) | 327 kg | Details → |
| 40″ | 1000 | 1289 mm (50.75″) | 88.9 mm (3.5″) | 1124 mm (44.25″) | 1200.2 mm (47.25″) | 36 × Ø41.3 mm (1.63″) | 1041 mm (40.98″) | 162 mm (6.38″) | 352 kg | Details → |
| 42″ | 1050 | 1346 mm (52.99″) | 95.2 mm (3.75″) | 1194 mm (47.01″) | 1257.3 mm (49.5″) | 36 × Ø41.3 mm (1.63″) | 1092 mm (42.99″) | 170 mm (6.69″) | 404 kg | Details → |
| 44″ | 1100 | 1403 mm (55.24″) | 100.1 mm (3.94″) | 1245 mm (49.02″) | 1314.4 mm (51.75″) | 40 × Ø41.3 mm (1.63″) | 1143 mm (45″) | 176 mm (6.93″) | 449 kg | Details → |
| 46″ | 1150 | 1454 mm (57.24″) | 101.6 mm (4″) | 1295 mm (50.98″) | 1365.2 mm (53.75″) | 40 × Ø41.3 mm (1.63″) | 1197 mm (47.13″) | 184 mm (7.24″) | 481 kg | Details → |
| 48″ | 1200 | 1511 mm (59.49″) | 106.4 mm (4.19″) | 1359 mm (53.5″) | 1422.4 mm (56″) | 44 × Ø41.3 mm (1.63″) | 1248 mm (49.13″) | 191 mm (7.52″) | 538 kg | Details → |
| 50″ | 1250 | 1568 mm (61.73″) | 109.7 mm (4.32″) | 1410 mm (55.51″) | 1479.6 mm (58.25″) | 44 × Ø47.6 mm (1.87″) | 1302 mm (51.26″) | 202 mm (7.95″) | 576 kg | Details → |
| 52″ | 1300 | 1626 mm (64.02″) | 114.3 mm (4.5″) | 1461 mm (57.52″) | 1536.7 mm (60.5″) | 44 × Ø47.6 mm (1.87″) | 1353 mm (53.27″) | 208 mm (8.19″) | 640 kg | Details → |
| 54″ | 1350 | 1683 mm (66.26″) | 119.1 mm (4.69″) | 1511 mm (59.49″) | 1593.8 mm (62.75″) | 44 × Ø47.6 mm (1.87″) | 1403 mm (55.24″) | 214 mm (8.43″) | 719 kg | Details → |
| 56″ | 1400 | 1746 mm (68.74″) | 122.4 mm (4.82″) | 1575 mm (62.01″) | 1651 mm (65″) | 48 × Ø47.6 mm (1.87″) | 1457 mm (57.36″) | 227 mm (8.94″) | 798 kg | Details → |
| 58″ | 1450 | 1803 mm (70.98″) | 127 mm (5″) | 1626 mm (64.02″) | 1708.2 mm (67.25″) | 48 × Ø47.6 mm (1.87″) | 1508 mm (59.37″) | 233 mm (9.17″) | 869 kg | Details → |
| 60″ | 1500 | 1854 mm (72.99″) | 130.3 mm (5.13″) | 1676 mm (65.98″) | 1759 mm (69.25″) | 52 × Ø47.6 mm (1.87″) | 1559 mm (61.38″) | 238 mm (9.37″) | 928 kg | Details → |
18 sizes · ASME B16.47 Series A Class 150 · ASME B16.47-2025, Series A
ASME B16.47 Series A Class 300 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 972 mm (38.27″) | 78 mm (3.07″) | 749 mm (29.49″) | 876.3 mm (34.5″) | 28 × Ø44.5 mm (1.75″) | 721 mm (28.39″) | 183 mm (7.2″) | 274 kg | Details → |
| 28″ | 700 | 1035 mm (40.75″) | 84.3 mm (3.32″) | 800 mm (31.5″) | 939.8 mm (37″) | 28 × Ø44.5 mm (1.75″) | 775 mm (30.51″) | 195 mm (7.68″) | 338 kg | Details → |
| 30″ | 750 | 1092 mm (42.99″) | 90.7 mm (3.57″) | 857 mm (33.74″) | 997 mm (39.25″) | 28 × Ø47.6 mm (1.87″) | 827 mm (32.56″) | 208 mm (8.19″) | 395 kg | Details → |
| 32″ | 800 | 1149 mm (45.24″) | 97 mm (3.82″) | 914 mm (35.98″) | 1054.1 mm (41.5″) | 28 × Ø50.8 mm (2″) | 881 mm (34.69″) | 221 mm (8.7″) | 456 kg | Details → |
| 34″ | 850 | 1206 mm (47.48″) | 100.1 mm (3.94″) | 965 mm (37.99″) | 1104.9 mm (43.5″) | 28 × Ø50.8 mm (2″) | 937 mm (36.89″) | 230 mm (9.06″) | 519 kg | Details → |
| 36″ | 900 | 1270 mm (50″) | 103.4 mm (4.07″) | 1022 mm (40.24″) | 1168.4 mm (46″) | 32 × Ø54 mm (2.13″) | 991 mm (39.02″) | 240 mm (9.45″) | 578 kg | Details → |
| 38″ | 950 | 1168 mm (45.98″) | 106.4 mm (4.19″) | 1029 mm (40.51″) | 1092.2 mm (43″) | 32 × Ø41.3 mm (1.63″) | 994 mm (39.13″) | 179 mm (7.05″) | 315 kg | Details → |
| 40″ | 1000 | 1238 mm (48.74″) | 112.8 mm (4.44″) | 1086 mm (42.76″) | 1155.7 mm (45.5″) | 32 × Ø44.5 mm (1.75″) | 1048 mm (41.26″) | 192 mm (7.56″) | 381 kg | Details → |
| 42″ | 1050 | 1289 mm (50.75″) | 117.6 mm (4.63″) | 1137 mm (44.76″) | 1206.5 mm (47.5″) | 32 × Ø44.5 mm (1.75″) | 1099 mm (43.27″) | 199 mm (7.83″) | 431 kg | Details → |
| 44″ | 1100 | 1353 mm (53.27″) | 122.4 mm (4.82″) | 1194 mm (47.01″) | 1263.6 mm (49.75″) | 32 × Ø47.6 mm (1.87″) | 1149 mm (45.24″) | 205 mm (8.07″) | 479 kg | Details → |
| 46″ | 1150 | 1416 mm (55.75″) | 127 mm (5″) | 1245 mm (49.02″) | 1320.8 mm (52″) | 28 × Ø50.8 mm (2″) | 1203 mm (47.36″) | 214 mm (8.43″) | 560 kg | Details → |
| 48″ | 1200 | 1467 mm (57.76″) | 131.8 mm (5.19″) | 1302 mm (51.26″) | 1371.6 mm (54″) | 32 × Ø50.8 mm (2″) | 1254 mm (49.37″) | 222 mm (8.74″) | 626 kg | Details → |
| 50″ | 1250 | 1530 mm (60.24″) | 138.2 mm (5.44″) | 1359 mm (53.5″) | 1428.8 mm (56.25″) | 32 × Ø54 mm (2.13″) | 1305 mm (51.38″) | 230 mm (9.06″) | 694 kg | Details → |
| 52″ | 1300 | 1581 mm (62.24″) | 143 mm (5.63″) | 1410 mm (55.51″) | 1479.6 mm (58.25″) | 32 × Ø54 mm (2.13″) | 1356 mm (53.39″) | 237 mm (9.33″) | 753 kg | Details → |
| 54″ | 1350 | 1657 mm (65.24″) | 150.9 mm (5.94″) | 1467 mm (57.76″) | 1549.4 mm (61″) | 28 × Ø60.3 mm (2.37″) | 1410 mm (55.51″) | 251 mm (9.88″) | 930 kg | Details → |
| 56″ | 1400 | 1708 mm (67.24″) | 152.4 mm (6″) | 1518 mm (59.76″) | 1600.2 mm (63″) | 28 × Ø60.3 mm (2.37″) | 1464 mm (57.64″) | 259 mm (10.2″) | 977 kg | Details → |
| 58″ | 1450 | 1759 mm (69.25″) | 157.2 mm (6.19″) | 1575 mm (62.01″) | 1651 mm (65″) | 32 × Ø60.3 mm (2.37″) | 1514 mm (59.61″) | 265 mm (10.43″) | 1030 kg | Details → |
| 60″ | 1500 | 1810 mm (71.26″) | 162.1 mm (6.38″) | 1626 mm (64.02″) | 1701.8 mm (67″) | 32 × Ø60.3 mm (2.37″) | 1565 mm (61.61″) | 272 mm (10.71″) | 1120 kg | Details → |
18 sizes · ASME B16.47 Series A Class 300 · ASME B16.47-2025, Series A
ASME B16.47 Series A Class 400 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 972 mm (38.27″) | 88.9 mm (3.5″) | 749 mm (29.49″) | 876.3 mm (34.5″) | 28 × Ø47.6 mm (1.87″) | 727 mm (28.62″) | 194 mm (7.64″) | 295 kg | Details → |
| 28″ | 700 | 1035 mm (40.75″) | 95.3 mm (3.75″) | 800 mm (31.5″) | 939.8 mm (37″) | 28 × Ø50.8 mm (2″) | 783 mm (30.83″) | 206 mm (8.11″) | 356 kg | Details → |
| 30″ | 750 | 1092 mm (42.99″) | 101.6 mm (4″) | 857 mm (33.74″) | 997 mm (39.25″) | 28 × Ø54 mm (2.13″) | 837 mm (32.95″) | 219 mm (8.62″) | 411 kg | Details → |
| 32″ | 800 | 1149 mm (45.24″) | 108 mm (4.25″) | 914 mm (35.98″) | 1054.1 mm (41.5″) | 28 × Ø54 mm (2.13″) | 889 mm (35″) | 232 mm (9.13″) | 483 kg | Details → |
| 34″ | 850 | 1206 mm (47.48″) | 111.3 mm (4.38″) | 965 mm (37.99″) | 1104.9 mm (43.5″) | 28 × Ø54 mm (2.13″) | 945 mm (37.2″) | 241 mm (9.49″) | 544 kg | Details → |
| 36″ | 900 | 1270 mm (50″) | 114.3 mm (4.5″) | 1022 mm (40.24″) | 1168.4 mm (46″) | 32 × Ø54 mm (2.13″) | 1000 mm (39.37″) | 251 mm (9.88″) | 608 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″) | 424 kg | 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″) | 494 kg | 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″) | 540 kg | 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″) | 624 kg | 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″) | 692 kg | 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″) | 812 kg | 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″) | 885 kg | 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″) | 964 kg | 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″) | 1163 kg | 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″) | 1229 kg | 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″) | 1465 kg | 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″) | 1733 kg | Details → |
18 sizes · ASME B16.47 Series A Class 400 · ASME B16.47-2025, Series A
ASME B16.47 Series A Class 600 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1016 mm (40″) | 108 mm (4.25″) | 749 mm (29.49″) | 914.4 mm (36″) | 28 × Ø50.8 mm (2″) | 748 mm (29.45″) | 222 mm (8.74″) | 426 kg | Details → |
| 28″ | 700 | 1073 mm (42.24″) | 111.3 mm (4.38″) | 800 mm (31.5″) | 965.2 mm (38″) | 28 × Ø54 mm (2.13″) | 803 mm (31.61″) | 235 mm (9.25″) | 481 kg | Details → |
| 30″ | 750 | 1130 mm (44.49″) | 114.3 mm (4.5″) | 857 mm (33.74″) | 1022.4 mm (40.25″) | 28 × Ø54 mm (2.13″) | 862 mm (33.94″) | 248 mm (9.76″) | 549 kg | Details → |
| 32″ | 800 | 1194 mm (47.01″) | 117.3 mm (4.62″) | 914 mm (35.98″) | 1079.5 mm (42.5″) | 28 × Ø60.3 mm (2.37″) | 917 mm (36.1″) | 260 mm (10.24″) | 624 kg | Details → |
| 34″ | 850 | 1245 mm (49.02″) | 120.7 mm (4.75″) | 965 mm (37.99″) | 1130.3 mm (44.5″) | 28 × Ø60.3 mm (2.37″) | 973 mm (38.31″) | 270 mm (10.63″) | 699 kg | Details → |
| 36″ | 900 | 1314 mm (51.73″) | 124 mm (4.88″) | 1022 mm (40.24″) | 1193.8 mm (47″) | 28 × Ø66.7 mm (2.63″) | 1032 mm (40.63″) | 282 mm (11.1″) | 773 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″) | 667 kg | 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″) | 739 kg | 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″) | 921 kg | 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″) | 980 kg | 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″) | 1093 kg | 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″) | 1295 kg | 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″) | 1510 kg | 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″) | 1615 kg | 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″) | 1778 kg | 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″) | 1941 kg | 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″) | 2105 kg | 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″) | 2268 kg | Details → |
18 sizes · ASME B16.47 Series A Class 600 · ASME B16.47-2025, Series A
ASME B16.47 Series A Class 900 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1086 mm (42.76″) | 139.7 mm (5.5″) | 749 mm (29.49″) | 952.5 mm (37.5″) | 20 × Ø73 mm (2.87″) | 775 mm (30.51″) | 286 mm (11.26″) | 692 kg | Details → |
| 28″ | 700 | 1168 mm (45.98″) | 142.7 mm (5.62″) | 800 mm (31.5″) | 1022.4 mm (40.25″) | 20 × Ø79.4 mm (3.13″) | 832 mm (32.76″) | 298 mm (11.73″) | 821 kg | Details → |
| 30″ | 750 | 1232 mm (48.5″) | 149.4 mm (5.88″) | 857 mm (33.74″) | 1085.8 mm (42.75″) | 20 × Ø79.4 mm (3.13″) | 889 mm (35″) | 311 mm (12.24″) | 962 kg | Details → |
| 32″ | 800 | 1314 mm (51.73″) | 158.8 mm (6.25″) | 914 mm (35.98″) | 1155.7 mm (45.5″) | 20 × Ø85.7 mm (3.37″) | 946 mm (37.24″) | 330 mm (12.99″) | 1154 kg | Details → |
| 34″ | 850 | 1397 mm (55″) | 165.1 mm (6.5″) | 965 mm (37.99″) | 1225.6 mm (48.25″) | 20 × Ø92.1 mm (3.63″) | 1006 mm (39.61″) | 349 mm (13.74″) | 1347 kg | Details → |
| 36″ | 900 | 1460 mm (57.48″) | 171.5 mm (6.75″) | 1022 mm (40.24″) | 1289 mm (50.75″) | 20 × Ø92.1 mm (3.63″) | 1064 mm (41.89″) | 362 mm (14.25″) | 1540 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″) | 1535 kg | 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″) | 1642 kg | 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″) | 1796 kg | 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″) | 1950 kg | 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″) | 2105 kg | 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″) | 2259 kg | Details → |
12 sizes · ASME B16.47 Series A Class 900 · ASME B16.47-2025, Series A
Blind Flanges — ASME B16.47 Series A
Blind product page →Large blind for isolating lines, sphere and vessel openings, and hydrostatic test ends.
ASME B16.47 Series A Class 150 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 870 mm (34.25″) | 66.8 mm (2.63″) | 749 mm (29.49″) | 806.4 mm (31.75″) | 24 × Ø34.9 mm (1.37″) | 318 kg | Details → |
| 28″ | 700 | 927 mm (36.5″) | 69.8 mm (2.75″) | 800 mm (31.5″) | 863.6 mm (34″) | 28 × Ø34.9 mm (1.37″) | 378 kg | Details → |
| 30″ | 750 | 984 mm (38.74″) | 73.2 mm (2.88″) | 857 mm (33.74″) | 914.4 mm (36″) | 28 × Ø34.9 mm (1.37″) | 445 kg | Details → |
| 32″ | 800 | 1060 mm (41.73″) | 79.5 mm (3.13″) | 914 mm (35.98″) | 977.9 mm (38.5″) | 28 × Ø41.3 mm (1.63″) | 562 kg | Details → |
| 34″ | 850 | 1111 mm (43.74″) | 81 mm (3.19″) | 965 mm (37.99″) | 1028.7 mm (40.5″) | 32 × Ø41.3 mm (1.63″) | 628 kg | Details → |
| 36″ | 900 | 1168 mm (45.98″) | 88.9 mm (3.5″) | 1022 mm (40.24″) | 1085.8 mm (42.75″) | 32 × Ø41.3 mm (1.63″) | 760 kg | Details → |
| 38″ | 950 | 1238 mm (48.74″) | 85.9 mm (3.38″) | 1073 mm (42.24″) | 1149.4 mm (45.25″) | 32 × Ø41.3 mm (1.63″) | 825 kg | Details → |
| 40″ | 1000 | 1289 mm (50.75″) | 88.9 mm (3.5″) | 1124 mm (44.25″) | 1200.2 mm (47.25″) | 36 × Ø41.3 mm (1.63″) | 925 kg | Details → |
| 42″ | 1050 | 1346 mm (52.99″) | 95.2 mm (3.75″) | 1194 mm (47.01″) | 1257.3 mm (49.5″) | 36 × Ø41.3 mm (1.63″) | 1080 kg | Details → |
| 44″ | 1100 | 1403 mm (55.24″) | 100.1 mm (3.94″) | 1245 mm (49.02″) | 1314.4 mm (51.75″) | 40 × Ø41.3 mm (1.63″) | 1232 kg | Details → |
| 46″ | 1150 | 1454 mm (57.24″) | 101.6 mm (4″) | 1295 mm (50.98″) | 1365.2 mm (53.75″) | 40 × Ø41.3 mm (1.63″) | 1343 kg | Details → |
| 48″ | 1200 | 1511 mm (59.49″) | 106.4 mm (4.19″) | 1359 mm (53.5″) | 1422.4 mm (56″) | 44 × Ø41.3 mm (1.63″) | 1520 kg | Details → |
| 50″ | 1250 | 1568 mm (61.73″) | 109.7 mm (4.32″) | 1410 mm (55.51″) | 1479.6 mm (58.25″) | 44 × Ø47.6 mm (1.87″) | 1686 kg | Details → |
| 52″ | 1300 | 1626 mm (64.02″) | 114.3 mm (4.5″) | 1461 mm (57.52″) | 1536.7 mm (60.5″) | 44 × Ø47.6 mm (1.87″) | 1885 kg | Details → |
| 54″ | 1350 | 1683 mm (66.26″) | 119.1 mm (4.69″) | 1511 mm (59.49″) | 1593.8 mm (62.75″) | 44 × Ø47.6 mm (1.87″) | 2103 kg | Details → |
| 56″ | 1400 | 1746 mm (68.74″) | 122.4 mm (4.82″) | 1575 mm (62.01″) | 1651 mm (65″) | 48 × Ø47.6 mm (1.87″) | 2327 kg | Details → |
| 58″ | 1450 | 1803 mm (70.98″) | 127 mm (5″) | 1626 mm (64.02″) | 1708.2 mm (67.25″) | 48 × Ø47.6 mm (1.87″) | 2574 kg | Details → |
| 60″ | 1500 | 1854 mm (72.99″) | 130.3 mm (5.13″) | 1676 mm (65.98″) | 1759 mm (69.25″) | 52 × Ø47.6 mm (1.87″) | 2792 kg | Details → |
18 sizes · ASME B16.47 Series A Class 150 · ASME B16.47-2025, Series A
ASME B16.47 Series A Class 300 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 972 mm (38.27″) | 82.6 mm (3.25″) | 749 mm (29.49″) | 876.3 mm (34.5″) | 28 × Ø44.5 mm (1.75″) | 489 kg | Details → |
| 28″ | 700 | 1035 mm (40.75″) | 88.9 mm (3.5″) | 800 mm (31.5″) | 939.8 mm (37″) | 28 × Ø44.5 mm (1.75″) | 596 kg | Details → |
| 30″ | 750 | 1092 mm (42.99″) | 93.7 mm (3.69″) | 857 mm (33.74″) | 997 mm (39.25″) | 28 × Ø47.6 mm (1.87″) | 701 kg | Details → |
| 32″ | 800 | 1149 mm (45.24″) | 98.6 mm (3.88″) | 914 mm (35.98″) | 1054.1 mm (41.5″) | 28 × Ø50.8 mm (2″) | 814 kg | Details → |
| 34″ | 850 | 1206 mm (47.48″) | 103.4 mm (4.07″) | 965 mm (37.99″) | 1104.9 mm (43.5″) | 28 × Ø50.8 mm (2″) | 938 kg | Details → |
| 36″ | 900 | 1270 mm (50″) | 109.7 mm (4.32″) | 1022 mm (40.24″) | 1168.4 mm (46″) | 32 × Ø54 mm (2.13″) | 1104 kg | Details → |
| 38″ | 950 | 1168 mm (45.98″) | 106.4 mm (4.19″) | 1029 mm (40.51″) | 1092.2 mm (43″) | 32 × Ø41.3 mm (1.63″) | 908 kg | Details → |
| 40″ | 1000 | 1238 mm (48.74″) | 112.8 mm (4.44″) | 1086 mm (42.76″) | 1155.7 mm (45.5″) | 32 × Ø44.5 mm (1.75″) | 1080 kg | Details → |
| 42″ | 1050 | 1289 mm (50.75″) | 117.6 mm (4.63″) | 1137 mm (44.76″) | 1206.5 mm (47.5″) | 32 × Ø44.5 mm (1.75″) | 1220 kg | Details → |
| 44″ | 1100 | 1353 mm (53.27″) | 122.4 mm (4.82″) | 1194 mm (47.01″) | 1263.6 mm (49.75″) | 32 × Ø47.6 mm (1.87″) | 1397 kg | Details → |
| 46″ | 1150 | 1416 mm (55.75″) | 127 mm (5″) | 1245 mm (49.02″) | 1320.8 mm (52″) | 28 × Ø50.8 mm (2″) | 1588 kg | Details → |
| 48″ | 1200 | 1467 mm (57.76″) | 131.8 mm (5.19″) | 1302 mm (51.26″) | 1371.6 mm (54″) | 32 × Ø50.8 mm (2″) | 1767 kg | Details → |
| 50″ | 1250 | 1530 mm (60.24″) | 138.2 mm (5.44″) | 1359 mm (53.5″) | 1428.8 mm (56.25″) | 32 × Ø54 mm (2.13″) | 2015 kg | Details → |
| 52″ | 1300 | 1581 mm (62.24″) | 143 mm (5.63″) | 1410 mm (55.51″) | 1479.6 mm (58.25″) | 32 × Ø54 mm (2.13″) | 2225 kg | Details → |
| 54″ | 1350 | 1657 mm (65.24″) | 150.9 mm (5.94″) | 1467 mm (57.76″) | 1549.4 mm (61″) | 28 × Ø60.3 mm (2.37″) | 2578 kg | Details → |
| 56″ | 1400 | 1708 mm (67.24″) | 152.4 mm (6″) | 1518 mm (59.76″) | 1600.2 mm (63″) | 28 × Ø60.3 mm (2.37″) | 2766 kg | Details → |
| 58″ | 1450 | 1759 mm (69.25″) | 157.2 mm (6.19″) | 1575 mm (62.01″) | 1651 mm (65″) | 32 × Ø60.3 mm (2.37″) | 3025 kg | Details → |
| 60″ | 1500 | 1810 mm (71.26″) | 162.1 mm (6.38″) | 1626 mm (64.02″) | 1701.8 mm (67″) | 32 × Ø60.3 mm (2.37″) | 3299 kg | Details → |
18 sizes · ASME B16.47 Series A Class 300 · ASME B16.47-2025, Series A
ASME B16.47 Series A Class 400 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 972 mm (38.27″) | 98.6 mm (3.88″) | 749 mm (29.49″) | 876.3 mm (34.5″) | 28 × Ø47.6 mm (1.87″) | 573 kg | Details → |
| 28″ | 700 | 1035 mm (40.75″) | 104.6 mm (4.12″) | 800 mm (31.5″) | 939.8 mm (37″) | 28 × Ø50.8 mm (2″) | 689 kg | Details → |
| 30″ | 750 | 1092 mm (42.99″) | 111.3 mm (4.38″) | 857 mm (33.74″) | 997 mm (39.25″) | 28 × Ø54 mm (2.13″) | 817 kg | Details → |
| 32″ | 800 | 1149 mm (45.24″) | 115.9 mm (4.56″) | 914 mm (35.98″) | 1054.1 mm (41.5″) | 28 × Ø54 mm (2.13″) | 941 kg | Details → |
| 34″ | 850 | 1206 mm (47.48″) | 122.2 mm (4.81″) | 965 mm (37.99″) | 1104.9 mm (43.5″) | 28 × Ø54 mm (2.13″) | 1095 kg | Details → |
| 36″ | 900 | 1270 mm (50″) | 128.6 mm (5.06″) | 1022 mm (40.24″) | 1168.4 mm (46″) | 32 × Ø54 mm (2.13″) | 1277 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″) | 1111 kg | Details → |
| 40″ | 1000 | 1270 mm (50″) | 130 mm (5.12″) | 1092 mm (42.99″) | 1174.8 mm (46.25″) | 32 × Ø50.8 mm (2″) | 1293 kg | 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″) | 1433 kg | 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″) | 1649 kg | 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″) | 1869 kg | 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″) | 2143 kg | 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″) | 2405 kg | 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″) | 2641 kg | 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″) | 3058 kg | 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″) | 3335 kg | 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″) | 3622 kg | 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″) | 4139 kg | Details → |
18 sizes · ASME B16.47 Series A Class 400 · ASME B16.47-2025, Series A
ASME B16.47 Series A Class 600 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1016 mm (40″) | 125.4 mm (4.94″) | 749 mm (29.49″) | 914.4 mm (36″) | 28 × Ø50.8 mm (2″) | 798 kg | Details → |
| 28″ | 700 | 1073 mm (42.24″) | 131.8 mm (5.19″) | 800 mm (31.5″) | 965.2 mm (38″) | 28 × Ø54 mm (2.13″) | 935 kg | Details → |
| 30″ | 750 | 1130 mm (44.49″) | 139.7 mm (5.5″) | 857 mm (33.74″) | 1022.4 mm (40.25″) | 28 × Ø54 mm (2.13″) | 1099 kg | Details → |
| 32″ | 800 | 1194 mm (47.01″) | 147.6 mm (5.81″) | 914 mm (35.98″) | 1079.5 mm (42.5″) | 28 × Ø60.3 mm (2.37″) | 1296 kg | Details → |
| 34″ | 850 | 1245 mm (49.02″) | 154 mm (6.06″) | 965 mm (37.99″) | 1130.3 mm (44.5″) | 28 × Ø60.3 mm (2.37″) | 1468 kg | Details → |
| 36″ | 900 | 1314 mm (51.73″) | 162.1 mm (6.38″) | 1022 mm (40.24″) | 1193.8 mm (47″) | 28 × Ø66.7 mm (2.63″) | 1724 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″) | 1544 kg | 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″) | 1741 kg | 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″) | 2080 kg | 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″) | 2316 kg | 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″) | 2612 kg | 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″) | 3056 kg | Details → |
| 50″ | 1250 | 1670 mm (65.75″) | 203.2 mm (8″) | 1384 mm (54.49″) | 1524 mm (60″) | 28 × Ø79.4 mm (3.13″) | 3490 kg | 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″) | 3822 kg | 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″) | 4233 kg | 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″) | 4776 kg | 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″) | 5177 kg | 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″) | 5946 kg | Details → |
18 sizes · ASME B16.47 Series A Class 600 · ASME B16.47-2025, Series A
ASME B16.47 Series A Class 900 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 26″ | 650 | 1086 mm (42.76″) | 160.3 mm (6.31″) | 749 mm (29.49″) | 952.5 mm (37.5″) | 20 × Ø73 mm (2.87″) | 1164 kg | Details → |
| 28″ | 700 | 1168 mm (45.98″) | 171.5 mm (6.75″) | 800 mm (31.5″) | 1022.4 mm (40.25″) | 20 × Ø79.4 mm (3.13″) | 1442 kg | Details → |
| 30″ | 750 | 1232 mm (48.5″) | 182.4 mm (7.18″) | 857 mm (33.74″) | 1085.8 mm (42.75″) | 20 × Ø79.4 mm (3.13″) | 1705 kg | Details → |
| 32″ | 800 | 1314 mm (51.73″) | 193.5 mm (7.62″) | 914 mm (35.98″) | 1155.7 mm (45.5″) | 20 × Ø85.7 mm (3.37″) | 2060 kg | Details → |
| 34″ | 850 | 1397 mm (55″) | 204.8 mm (8.06″) | 965 mm (37.99″) | 1225.6 mm (48.25″) | 20 × Ø92.1 mm (3.63″) | 2461 kg | Details → |
| 36″ | 900 | 1460 mm (57.48″) | 214.3 mm (8.44″) | 1022 mm (40.24″) | 1289 mm (50.75″) | 20 × Ø92.1 mm (3.63″) | 2817 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″) | 2836 kg | 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″) | 3148 kg | 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″) | 3481 kg | 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″) | 4062 kg | 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″) | 4729 kg | 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″) | 5170 kg | Details → |
12 sizes · ASME B16.47 Series A Class 900 · ASME B16.47-2025, Series A
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. Flat face (FF) and ring-type joint (RTJ) faces are available against the drawing.
ASME B16.47 Series A 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.