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ASME B16.47 Series B - Large Flanges

API 605 Dimensions (mm)

Column Legend

NPS = Nominal Pipe Size (inch) OD = Flange Outside Diameter BC = Bolt Circle Diameter RF = Raised Face Diameter n = Number of Bolts d = Bolt Hole Diameter

All dimensions in mm per ASME B16.47 Series B (API 605) - Large diameter flanges NPS 26-60

Class 150

NPS OD BC RF n d
26 724 660 603 24 32
28 787 711 654 28 32
30 838 762 705 28 35
32 889 813 756 28 35
34 940 864 806 32 35
36 991 914 857 32 35
42 1130 1054 997 36 35
48 1283 1194 1137 40 38
54 1435 1346 1283 44 38
60 1575 1486 1422 52 35

Class 300

NPS OD BC RF n d
26 787 711 629 24 38
28 851 775 679 28 38
30 914 826 730 28 41
32 965 876 781 28 44
34 1016 927 832 28 48
36 1067 978 883 32 48
42 1219 1118 1022 36 51
48 1372 1270 1175 40 51
54 1537 1422 1327 44 54
60 1683 1575 1467 52 51

Class 600

NPS OD BC RF n d
26 876 781 654 28 48
28 940 845 705 28 51
30 1003 902 756 28 54
32 1060 959 806 28 57
34 1118 1016 857 28 60
36 1181 1073 908 32 60
42 1346 1232 1060 36 64
48 1524 1397 1213 40 70
54 1689 1562 1365 44 70
60 1854 1727 1518 48 73