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  
16"    400mm ASME B16.5 150 23 1/4 591 21 1/4 540 1 1/8 29 1  7/16 37 18 1/2 470   1/16 1.6 16
300 25 1/2 648 22 1/2 572 1 3/8 35 2 1/4 57 20
600 27 686 23 3/4 603 1 5/8 41 3    76  1/4 6.4
900 27 3/4 705 24 1/4 616 1 3/4 45 3 1/2 89
BS EN 1092/1 (PN) 16 22 13/16 580 20 11/16 525 1  3/16 30 1 1/4 32 19  5/16 490   5/32 4 16
25 24  7/16 620 21 5/8 550 1  5/16 33 1  9/16 40 19 7/8 505
40 26 660 23  1/16 585 1  7/16 39 2 50 21  1/16 535
BS 10 E 22 3/4 578 20 1/2 520 15/16 23 1 25   12
F 24 610 21 3/4 553 1  1/16 27 1 1/4 32 20
H 1 3/4 45 19 482   1/16 1.6
J 1  3/16 30 2 1/4 57
R 25 1/4 641 23 584 1  5/16 33 3 76
 
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