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 1/2"    65mm ASME B16.5 150 7 178 5 1/2 140  3/4 19  7/8 22 4 1/8 105   1/16 1.6 4
300 7 1/2 190 5 7/8 149  7/8 22 1 25 8
600 1 1/8 29  1/4 6.4
900 9 5/8 244 7 1/2 190 1 1/8 29 1 5/8 41
BS EN 1092/1 (PN) 16 7 1/4 185 5 11/16 145  11/16 18  11/16 18 4 15/16 122  1/8 3 4
25  7/8 22 8
40
BS 10 E 6 1/2 165 5 127  11/16 18   9/16 14   4
F 7 1/4 184 5 3/4 146  5/8 16 8
H  3/4 19 4 1/2 114   1/16 1.6
J  7/8 22 1 25
R 1 1/8 28
 
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