Flanges WN - Class 900 RF ASME 16.47 Series B

All dimensions are in "mm" unless noted otherwise.

Dimensions of Class 900 RF Weld Neck Flanges Series B as per ASME B16.47.

Weld Neck Flange

Nominal
Pipe Size		 OD of
Flange
(O)		 Thickness
of Flange
(C)		 Length
thru Hub
(V)		 Dia of
Hub at base
(X)		 Dia of
Hub at end
(A)		 Dia of
Raised Face
(R)		 Dia of
Bolt Circle		 No of
Bolt
Holes		 Dia of
Bolt
Holes		 Dia of
Bolt		 Fillet
Radius
(r1)		 Approx
Weight
(kg)
26 1022.4 134.9 258.8 743 660.4 962 901.7 20 66.5 63.5 11.2 538
28 1104.9 147.6 276.4 797.1 711.2 819.2 971.6 20 73.2 69.9 12.7 675
30 1181.1 155.4 289.1 850.9 762 876.3 1035.1 20 79.2 76.2 12.7 798
32 1238.3 160.3 303.3 908.1 812.8 927.1 1092.2 20 79.2 76.2 12.7 898
34 1314.5 171.5 319 962.2 863.6 990.6 1155.7 20 85.9 82.6 14.2 1063
36 1346.2 173 325.4 1016 914.4 1028.7 1200.2 24 79.2 76.2 14.2 1078
38 1460.5 190.5 352.6 1073.2 965.2 1098.6 1289.1 20 91.9 88.9 19.1 1445
40 1511.3 196.9 363.5 1127.3 1016 1162.1 1339.9 24 91.9 88.9 20.6 1529
42 1562.1 206.2 371.3 1176.3 1066.8 1212.9 1390.7 24 91.9 88.9 20.6 1666
44 1648 214.4 390.7 1234.9 1117.6 1270 1463.5 24 98.6 95.3 22.4 1939
46 1733.6 225.6 411 1292.4 1168.4 1333.5 1536.7 24 104.6 101.6 22.4 2265
48 1784.4 233.4 419.1 1343.2 1219.2 1384.3 1587.5 24 104.6 101.6 23.9 2433

Note that the dimensions of Series B flanges are same as Series A flanges for sizes NPS 38 and above in Class 900 rating.

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