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  
6"    150mm ASME B16.5 150 11 280 9 1/2 241  7/8 22 1 25 8 1/2 216   1/16 1.6 8
300 12 1/2 318 10 5/8 270 1  7/16 36 12
600 14 355 11 1/2 292 1 1/8 28 1 7/8 48  1/4 6.4
900 15 381 12 1/2 318 1 1/4 32 2  3/16 56
BS EN 1092/1 (PN) 16 11  3/16 285 9  7/16 240 15/16 23  7/8 22 8 3/8 212  1/8 3 8
25 11 13/16 300 9 7/8 250 1  1/16 27 1 1/8 28 8  9/16 218
40
BS 10 E 11 280 9 1/4 235 13/16 21  11/16 18   8
F 12 305 10 1/4 260  7/8 22 12
H 1 1/8 28 8 1/4 210   1/16 1.6
J 15/16 24 1 1/2 38
R 1 3/4 44
 
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