Flange Comparison Table
 
SIZE STAND-ARD CLASS FLANGE DIAMETER BOLT HOLE P.C.D. BOLT HOLE DIAMETER FLANGE THICKNESS RAISED FACE DIAMETER RAISED FACE HEIGHT No. OF BOLTS
D P d t R f N
ins mm ins mm ins mm ins mm ins mm ins mm  
2"    50mm ASME B16.5 150 6 152 4 3/4 121  3/4 19  3/4 19 3 5/8 92   1/16 1.6 4
300 6 1/2 165 5 127  7/8 22 8
600 1 25  1/4 6.4
900 8 1/2 216 6 1/2 165 1 25 1 1/2 38
BS EN 1092/1 (PN) 16 6 1/2 165 4 15/16 125  11/16 18  11/16 18 4 102  1/8 3 4
25 13/16 20
40
BS 10 E 6 152 4 1/2 114  11/16 18   9/16 14   4
F 6 1/2 165 5 127  5/8 16
H  3/4 19 4 102   1/16 1.6
J 1 25
R 8
 
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