Weld neck flange (also known as a high-hub flange and tapered hub flange) is a type of flange. There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant.A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.
ASME B16.47 Series B Welding Neck Flanges Class 150/300 LBS Dimensions
|
ASME B16.47 Series B Welding Neck Flanges Class 150 LBS Dimensions
|
||||||||||
| NPS | A | B | I | Holes | C | D | F | E | G | Weight |
| 26″ | 786 | 635 | 22.4 | 36 | 41.1 | 88.9 | 684.3 | 661.9 | 711.2 | 63.56 |
| 28″ | 837 | 685.8 | 22.4 | 40 | 44.5 | 95.3 | 735.1 | 712.7 | 762 | 73.5 |
| 30″ | 887 | 736.6 | 22.4 | 44 | 44.5 | 100.1 | 787.4 | 763.5 | 812.8 | 80.05 |
| 32″ | 941 | 787.4 | 22.4 | 48 | 46 | 108 | 839.7 | 814.3 | 863.6 | 91.76 |
| 34″ | 1005 | 838.2 | 25.4 | 40 | 49.3 | 110.2 | 892 | 865.1 | 920.8 | 110.27 |
| 36″ | 1057 | 889 | 25.4 | 44 | 52.3 | 117.3 | 944.6 | 915.9 | 971.6 | 124.91 |
| 38″ | 1124 | 939.8 | 28.4 | 40 | 53.8 | 124 | 997 | 968.2 | 1022.4 | 149.17 |
| 40″ | 1175 | 990.6 | 28.4 | 44 | 55.6 | 128.5 | 1049.3 | 1019 | 1079.5 | 162.58 |
| 42″ | 1226 | 1041.4 | 28.4 | 48 | 58.7 | 133.4 | 1101.9 | 1069.8 | 1130.3 | 179.18 |
| 44″ | 1276 | 1092.2 | 31.8 | 52 | 60.5 | 136.7 | 1152.7 | 1120.6 | 1181.1 | 187.51 |
| 46″ | 1341 | 1143 | 31.8 | 40 | 62 | 144.5 | 1205 | 1171.4 | 1234.9 | 223.84 |
| 48″ | 1392 | 1193.8 | 31.8 | 44 | 65 | 149.4 | 1257.3 | 1222.2 | 1289.1 | 243.46 |
| 50″ | 1443 | 1244.6 | 31.8 | 48 | 68.3 | 153.9 | 1308.1 | 1273 | 1339.9 | 263.22 |
| 52″ | 1494 | 1295.4 | 31.8 | 52 | 69.9 | 157.2 | 1360.4 | 1323.8 | 1390.7 | 279.95 |
| 54″ | 1549 | 1346.2 | 31.8 | 56 | 71.4 | 162.1 | 1412.7 | 1374.6 | 1441.5 | 303.62 |
| 56″ | 1600 | 1397 | 31.8 | 60 | 73.2 | 166.6 | 1465.3 | 1425.4 | 1492.3 | 323.64 |
| 58″ | 1675 | 1447.8 | 35.1 | 48 | 74.7 | 174.8 | 1516.1 | 1476.2 | 1543.1 | 383.77 |
| 60″ | 1726 | 1498.6 | 35.1 | 52 | 76.2 | 179.3 | 1570 | 1527 | 1600.2 | 407.55 |
|
ASME B16.47 Series B Welding Neck Flanges Class 300 LBS Dimensions
|
||||||||||
| NPS | A | B | I | Holes | C | D | F | E | G | Weight |
| 26″ | 867 | 635 | 35.1 | 32 | 88.9 | 144.5 | 701.5 | 665.2 | 736.6 | 189.56 |
| 28″ | 921 | 685.8 | 35.1 | 36 | 88.9 | 149.4 | 755.7 | 716 | 787.4 | 207.56 |
| 30″ | 991 | 736.6 | 38.1 | 36 | 93.7 | 158 | 812.8 | 768.4 | 844.6 | 254.27 |
| 32″ | 1054 | 787.4 | 41.1 | 32 | 103.1 | 168.1 | 863.6 | 819.2 | 901.7 | 310.53 |
| 34″ | 1108 | 838.2 | 41.1 | 36 | 103.1 | 173 | 917.4 | 870 | 952.5 | 333.98 |
| 36″ | 1172 | 889 | 44.5 | 32 | 103.1 | 180.8 | 965.2 | 920.8 | 1009.7 | 374.99 |
| 38″ | 1222 | 939.8 | 44.5 | 36 | 111.3 | 192 | 1016 | 971.6 | 1060.5 | 51.95 |
| 40″ | 1273 | 990.6 | 44.5 | 40 | 115.8 | 198.4 | 1066.8 | 1022.4 | 1114.6 | 55.97 |
| 42″ | 1334 | 1041.4 | 47.8 | 36 | 119.1 | 204.7 | 1117.6 | 1074.7 | 1168.4 | 508.46 |
| 44″ | 1384 | 1092.2 | 47.8 | 40 | 127 | 214.4 | 1173.2 | 1125.5 | 1219.2 | 69.03 |
| 46″ | 1461 | 1143 | 50.8 | 36 | 128.5 | 222.3 | 1128.9 | 1176.3 | 1270 | 12.74 |
| 48″ | 1511 | 1193.8 | 50.8 | 40 | 128.5 | 223.8 | 1277.9 | 1227.1 | 1327.2 | 678.19 |
| 50″ | 1562 | 1244.6 | 50.8 | 44 | 138.2 | 235 | 1330.5 | 1277.9 | 1378 | 90.66 |
| 52″ | 1613 | 1295.4 | 50.8 | 48 | 142.7 | 242.8 | 1382.8 | 1328.7 | 1428.8 | 98.74 |
| 54″ | 1673 | 1346.2 | 50.8 | 48 | 136.7 | 239.8 | 1435.1 | 1379.5 | 1479.6 | 829.33 |
| 56″ | 1765 | 1397 | 60.5 | 36 | 153.9 | 268.2 | 1493.8 | 1422.4 | 1536.7 | 122.93 |
| 58″ | 1827 | 1447.8 | 60.5 | 40 | 153.9 | 274.6 | 1547.9 | 1481.1 | 1593.9 | 147.04 |
| 60″ | 1878 | 1498.6 | 60.5 | 40 | 150.9 | 271.5 | 1598.7 | 1531.9 | 1651 | 1201.14 |
ASME B16.47 Series B Welding Neck Flanges Class 400-900 LBS Dimensions
|
ASME B16.47 Series B Welding Neck Flanges Class 400 LBS Dimensions
|
||||||||||
| NPS | A | B | I | Holes | C | D | F | E | G | Weight |
| 26″ | 850.9 | 635 | 38.1 | 28 | 88.9 | 149.35 | 688.85 | 660.4 | 711.2 | 165.95 |
| 28″ | 914.4 | 685.8 | 41.15 | 24 | 95.25 | 158.9 | 739.65 | 711.2 | 762 | 204.49 |
| 30″ | 971.55 | 736.6 | 41.15 | 28 | 101.6 | 169.93 | 793.75 | 762 | 819.15 | 239.2 |
| 32″ | 1035.1 | 787.4 | 44.45 | 28 | 107.95 | 179.32 | 844.55 | 812.8 | 873.25 | 283.06 |
| 34″ | 1085.9 | 838.2 | 44.45 | 32 | 111.25 | 187.45 | 898.65 | 863 | 927.1 | 307.92 |
| 36″ | 1155.7 | 889 | 47.75 | 28 | 119.13 | 200.15 | 952.5 | 914.4 | 980.95 | 381.98 |
|
ASME B16.47 Series B Welding Neck Flanges Class 600 LBS Dimensions
|
||||||||||
| NPS | A | B | I | Holes | C | D | F | E | G | Weight |
| 26″ | 889 | 635 | 44.45 | 28 | 111.25 | 180.85 | 698.5 | 660.4 | 726.95 | 244.55 |
| 28″ | 952.5 | 685.8 | 47.75 | 28 | 115.82 | 190.5 | 752.35 | 711.2 | 784.35 | 287.49 |
| 30″ | 1022.4 | 736.6 | 50.8 | 28 | 125.48 | 204.72 | 806.45 | 762 | 841.25 | 358.02 |
| 32″ | 1085.9 | 787.4 | 53.85 | 28 | 130.05 | 215.9 | 860.55 | 812.8 | 895.35 | 414.01 |
| 34″ | 1162.1 | 838.2 | 60.45 | 24 | 141.22 | 233.43 | 914.4 | 863.6 | 952.5 | 523.71 |
| 1212.9 | 889 | 60.45 | 28 | 146.05 | 242.82 | 968.25 | 914.4 | 1009.7 | 564.36 | |
|
ASME B16.47 Series B Welding Neck Flanges Class 900 LBS Dimensions
|
||||||||||
| NPS | A | B | I | Holes | C | D | F | E | G | Weight |
| 26″ | 1022.4 | 635 | 66.55 | 20 | 134.87 | 258.83 | 742.95 | 660.4 | 762 | 513.64 |
| 28″ | 1104.9 | 685.8 | 73.15 | 20 | 147.57 | 276.35 | 797.05 | 711.2 | 819.15 | 646.22 |
| 30″ | 1181.1 | 736.6 | 79.25 | 20 | 155.45 | 289.05 | 850.9 | 762 | 876.3 | 765.72 |
| 32″ | 1238.3 | 787.4 | 79.25 | 20 | 160.27 | 303.28 | 908.05 | 812.8 | 927.1 | 863.06 |
| 34″ | 1314.5 | 838.2 | 85.85 | 20 | 171.45 | 319.02 | 962.15 | 863.6 | 990.6 | 1023.53 |
| 36″ | 1346.2 | 889 | 79.25 | 24 | 172.97 | 325.37 | 1016 | 914.4 | 1028.7 | 1038.21 |
