Dimensions to suit ASME Standard Flanges

Class 150 ASME B16.20 to suit ASME B16.5 flanges

Nominal Size Dimensions (mm) Nominal Size Dimensions (mm) Nominal Size Dimensions
½ ” 48 x 32 x 19 x 14 ¾ ” 57 x 40 x 25 x 21 1 “ 67 x 48 x 32 x 27
1 ¼ ” 76 x 60 x 48 x 38 1 ½ ” 86 x 70 x 54 x 44 2 “ 105 x 86 x 70 x 56
2 ½ ” 124 x 99 x 83 x 67 3 “ 137 x 121 x 102 x 81 4 “ 175 x 149 x 127 x 106
5 “ 197 x 178 x 156 x 132 6 “ 222 x 210 x 183 x 157 8 “ 279 x 264 x 233 x 216
10 “ 340 x 318 x 287 x 268 12 “ 410 x 375 x 340 x 318 14 “ 451 x 406 x 372 x 349
16 “ 514 x 464 x 422 x 400 18 “ 549 x 527 x 475 x 449 20 “ 607 x 578 x 526 x 500
24 “ 718 x 686 x 629 x 603        

Class 300 ASME B16.20 to suit ASME B16.5 flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
½ ” 54 x 32 x 19 x 14 ¾ ” 67 x 40 x 25 x 21 1 “ 73 x 48 x 32 x 27
1 ¼ ” 83 x 60 x 48 x 38 1 ½ ” 95 x 70 x 54 x 44 2 “ 111 x 86 x 70 x 56
2 ½ ” 130 x 99 x 83 x 67 3 “ 149 x 121 x 102 x 81 4 “ 181 x 149 x 127 x 106
5 “ 216 x 178 x 156 x 132 6 “ 251 x 210 x 183 x 157 8 “ 308 x 264 x 233 x 216
10 “ 362 x 318 x 287 x 268 12 “ 422 x 375 x 340 x 318 14 “ 486 x 406 x 372 x 349
16 “ 540 x 464 x 422 x 400 18 “ 597 x 527 x 475 x 449 20 “ 654 x 578 x 526 x 500
24 “ 775 x 686 x 629 x 603        

Class 600 ASME B16.20 to suit ASME B16.5 flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
½ ” 54 x 32 x 19 x 14 ¾ ” 67 x 40 x 25 x 21 1 “ 73 x 48 x 32 x 27
1 ¼ ” 83 x 60 x 48 x 38 1 ½ ” 95 x 70 x 54 x 44 2 “ 111 x 86 x 70 x 56
2 ½ ” 130 x 99 x 83 x 67 3 “ 149 x 121 x 102 x 81 4 “ 194 x 149 x 121 x 103
5 “ 241 x 178 x 148 x 128 6 “ 267 x 210 x 175 x 155 8 “ 321 x 264 x 226 x 206
14 “ 492 x 406 x 362 x 343 16 “ 565 x 464 x 413 x 390 18 “ 613 x 527 x 470 x 438
18 “ 613 x 527 x 470 x 438 20 “ 613 x 527 x 470 x 438 24 “ 791 x 686 x 629 x 591
10 “ 400 x 318 x 275 x 255 12 “ 457 x 375 x 327 x 307    

Class 900 ASME B16.20 to suit ASME B16.5 flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
½ ” 64 x 32 x 19 x 14 ¾ ” 70 x 40 x 25 x 21 1 “ 80 x 48 x 32 x 27
1 ¼ ” 89 x 60 x 40 x 33 1 ½ ” 99 x 70 x 48 x 41 2 “ 143 x 86 x 59 x 52
2 ½ ” 165 x 99 x 70 x 64 3 “ 168 x 121 x 95 x 79 4 “ 207 x 149 x 121 x 103
5 “ 248 x 178 x 148 x 128 6 “ 289 x 210 x 175 x 155 8 “ 359 x 257 x 222 x 197
10 “ 435 x 311 x 276 x 246 12 “ 499 x 368 x 324 x 292 14 “ 521 x 400 x 356 x 321
16 “ 575 x 457 x 413 x 375 18 “ 638 x 521 x 464 x 425 20 “ 699 x 572 x 521 x 483q
24 “ 838 x 679 x 629 x 591        

Class 1500 ASME B16.20 to suit ASME B16.5 flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
½ ” 64 x 32 x 19 x 14 ¾ ” 70 x 40 x 25 x 21 1 “ 80 x 48 x 32 x 27
1 ¼ ” 89 x 60 x 40 x 33 1 ½ ” 99 x 70 x 48 x 41 2 “ 143 x 86 x 59 x 52
2 ½ ” 165 x 99 x 70 x 64 3 “ 175 x 121 x 92 x 79 4 “ 210 x 149 x 118 x 98
5 “ 254 x 178 x 143 x 124 6 “ 283 x 210 x 171 x 147 8 “ 353 x 257 x 216 x 197              
10 “ 435 x 311 x 267 x 246 12 “ 521 x 368 x 324 x 292 14 “ 578 x 400 x 362 x 321
16 “ 641 x 457 x 406 x 368 18 “ 705 x 521 x 464 x 425 20 “ 756 x 572 x 514 x 476
24 “ 902 x 679 x 616 x 578        

Class 2500 ASME B16.20 to suit ASME B16.5 flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
½ ” 70 x 32 x 19 x 14 ¾ ” 76 x 40 x 25 x 21 1 “ 86 x 48 x 32 x 27
1 ¼ ” 105 x 60 x 40 x 33 1 ½ ” 118 x 70 x 48 x 41 2 “ 146 x 86 x 59 x 52
2 ½ ” 168 x 99 x 70 x 64 3 “ 197 x 121 x 92 x 79 4 “ 235 x 149 x 118 x 98
5 “ 279 x 178 x 143 x 124 6 “ 318 x 210 x 171 x 147 8 “ 387 x 257 x 216 x 197
10 “ 476 x 311 x 270 x 246 12 “ 549 x 368 x 318 x 292    

Class 150 ASME B16.20 to suit ASME B16.47 Series A flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
26” 775 x 705 x 673 x 654 28” 832 x 756 x 724 x 705                   30” 883 x 806 x 775 x 756
32” 940 x 861 x 826 x 806 34” 991 x 911 x 876 x 857 36” 1048 x 969 x 927 x 908
38” 1111 x 1019 x 978 x 959 40” 1162 x 1070 x 1029 x 1010 42” 1219 x 1124 x 1080 x 1060
44” 1276 x 1178 x 1130 x 1111 46” 1327 x 1229 x 1181 x 1162 48” 1384 x 1280 x 1232 x 1213
50” 1435 x 1334 x 1283 x 1264 52” 1492 x 1384 x 1334 x 1314 54” 1549 x 1435 x 1384 x 1359
56” 1607 x 1486 x 1435 x 1410 58” 1664 x 1537 x 1486 x 1461 60” 1715 x 1588 x 1537 x 1511

Class 300 ASME B16.20 to suit ASME B16.47 Series A flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
26” 835 x 737 x 686 x 654 28” 899 x 787 x 737 x 705 30” 953 x 845 x 794 x 756
32” 1007 x 902 x 851 x 806 34” 1057 x 953 x 902 x 857                   36” 1118 x 1007 x 956 x 908
38” 1054 x 1016 x 978 x 953 40” 1115 x 1070 x 1022 x 1003 42” 1165 x 1121 x 1073 x 1054
44” 1219 x 1181 x 1130 x 1105 46” 1273 x 1229 x 1178 x 1153 48” 1324 x 1286 x 1235 x 1210
50” 1378 x 1346 x 1295 x 1245 52” 1429 x 1403 x 1346 x 1321 54” 1492 x 1454 x 1397 x 1353
56” 1543 x 1505 x 1454 x 1403 58” 1594 x 1562 x 1511 x 1448 60” 1645 x 1613 x 1562 x 1524

Class 600 ASME B16.20 to suit ASME B16.47 Series A flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
26” 835 x 737 x 686 x 654 28” 899 x 787 x 737 x 705 30” 953 x 845 x 794 x 756
34” 1073 x 953 x 902 x 864 36” 1130 x 1007 x 956 x 918 38” 1105 x 1041 x 991 x 953
40” 1156 x 1099 x 1048 x 1010 42” 1219 x 1156 x 1105 x 1067 44” 1270 x 1213 x 1162 x 1111
46” 1327 x 1264 x 1213 x 1162 48” 1391 x 1321 x 1270 x 1219             50” 1448 x 1372 x 1321 x 1270
52” 1499 x 1422 x 1372 x 1321 54” 1556 x 1480 x 1429 x 1378 56” 1613 x 1530 x 1480 x 1429
58” 1664 x 1588 x 1537 x 1473 60” 1734 x 1645 x 1594 x 1530 32” 1022 x 902 x 851 x 813

Class 900 ASME B16.20 to suit ASME B16.47 Series A flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
26” 883 x 737 x 686 x 660 28” 946 x 787 x 737 x 711 30” 1010 x 845 x 794 x 768
32” 1073 x 902 x 851 x 813 34” 1137 x 953 x 902 x 864 36” 1200 x 1010 x 959 x 921
38” 1200 x 1086 x 1035 x 101
0		 40” 1251 x 1149 x 1099 x 1060 42” 1302 x 1200 x 1149 x 1111
44” 1369 x 1257 x 1207 x 1156 46” 1435 x 1321 x 1270 x 1219 48” 1486 x 1372 x 1321 x 1270

Class 150 ASME B16.20 to suit ASME B16.47 Series B flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
26” 725 x 699 x 673 x 654 28” 776 x 749 x 724 x 705 30” 827 x 800 x 775 x 756
32” 881 x 851 x 826 x 806 34” 935 x 908 x 876 x 857 36” 988 x 959 x 927 x 908
38” 1045 x 1010 x 975 x 959 40” 1096 x 1064 x 1022 x 1010 42” 1146 x 1115 x 1080 x 1060
44” 1197 x 1165 x 1124 x 1111 46” 1256 x 1224 x 1181 x 1162 48” 1307 x 1270 x 1232 x 1213
50” 1357 x 1326 x 1283 x 1264 52” 1408 x 1376 x 1334 x 1314 54” 1464 x 1422 x 1384 x 1365
56” 1515 x 1478 x 1445 x 1422 58” 1580 x 1529 x 1500 x 1478 60” 1630 x 1586 x 1557 x 1535

Class 300 ASME B16.20 to suit ASME B16.47 Series B flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
26” 772 x 711 x 673 x 654 28” 826 x 762 x 724 x 705 30” 886 x 813 x 775 x 756
32” 940 x 864 x 826 x 806 34” 994 x 914 x 876 x 857 36” 1048 x 965 x 927 x 908
38” 1099 x 1048 x 1010 x 972 40” 1149 x 1099 x 1060 x 1022 42” 1200 x 1149 x 1111 x 1086
44” 1251 x 1200 x 1162 x 1124 46” 1318 x 1254 x 1216 x 1178 48” 1369 x 1311 x 1264 x 1232
50” 1419 x 1356 x 1318 x 1267 52” 1470 x 1407 x 1369 x 1318 54” 1530 x 1454 x 1403 x 1365
56” 1594 x 1524 x 1480 x 1429 58” 1656 x 1573 x 1535 x 1484 60” 1707 x 1630 x 1589 x 1557

Class 600 ASME B16.20 to suit ASME B16.47 Series B flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
26” 765 x 715 x 664 x 645 28” 819 x 756 x 705 x 699 30” 880 x 829 x 778 x 753
32” 933 x 883 x 832 x 794 34” 997 x 940 x 889 x 851 36” 1048 x 991 x 940 x 902
38” 1105 x 1041 x 991 x 953 40” 1156 x 1099 x 1048 x 1010 42” 1219 x 1156 x 1105 x 1067
44” 1270 x 1213 x 1162 x 1111 46” 1327 x 1264 x 1213 x 1162 48” 1391 x 1321 x 1270 x 1219
50” 1448 x 1372 x 1321 x 1270 52” 1499 x 1422 x 1372 x 1321 54” 1556 x 1480 x 1429 x 1378
56” 1613 x 1530 x 1480 x 1429 58” 1664 x 1588 x 1537 x 1473 60” 1734 x 1645 x 1594 x 1530

Class 900 ASME B16.20 to suit ASME B16.47 Series B flanges

Nominal     Size Dimensions (mm)      Nominal     Size Dimensions (mm)      Nominal    Size Dimensions
26” 838 x 749 x 705 x 667 28” 902 x 800 x 743 x 718 30” 959 x 857 x 806 x 781
32” 1016 x 914 x 864 x 838 34” 1073 x 971 x 921 x 895 36” 1124 x 997 x 946 x 921
38” 1200 x 1086 x 1035 x 1010 40” 1251 x 1149 x 1099 x 1060 42” 1302 x 1200 x 1149 x 1111
44” 1369 x 1257 x 1207 x 1156 46” 1435 x 1321 x 1270 x 1219 48” 1486 x 1372 x 1321 x 1270