DIMENSION TABLES FOR 500mm (20 Inch) FLANGES

Dimensional tables for PN, ANSI and BS10 DN500mm (20 Inch) flanges.

Dimensions Tables for Flanges
DIMENSION TABLES FOR 500mm (20 Inch) FLANGES
BS EN
1092
DIAMETER
OF FLANGE
(A)
BOLT
CIRCLE
DIAMETER
(G)
number
OF BOLTS
BOLT SIZE DIAMETER
OF HOLES
(D)
DIAMETER
OF RAISED
FACE
(C)
HEIGHT
OF RAISED
FACE
(F)
THICKNESS
(E)

PN

PN 6 645 600 20 M20 22 570 2 24 (2)
PN 10 670 620 20 M24 26 585 2 28 (2)
PN 16 715 650 20 M30 33 610 2 44 (2)
PN 25 730 660 20 M33 36 615 2 48 (2)
PN 40 755 670 20 M39 42 615 2 57 (2)
PN 64 800 705 20 M45 48 615 2 68 (2)
PN 100 870 760 20 M52 56 615 2 94 (2)

ANSI

Class 125 / 150 27 1/2 (699) 25 (635) 20 1 1/8 (29) 1 1/4 (32) 23 (584) 1/16 1 11/16 (43)
Class 300 30 1/2 (775) 27 (686) 24 1 1/4 (32) 1 3/8 (35) 23 (584) 1/16 2 1/2 (64)
Class 600 32 (813) 281/2 (724) 24 1 5/8 (41) 1 3/4 (44) 23 (584) 1/4 3 1/2 (89)
Class 900 33 3/4 (857) 29 1/2 (749) 20 2 (51) 2 1/8 (54) 23 (584) 1/4 4 1/4 (108)
Class 1500 38 3/4 (984) 323/4 (832) 16 3 (76) 3 1/8 (79) 23 (584) 1/4 7 (178)

BS 10

Table A 27 3/4 (705) 25 1/4 (641) 12 7/8 (22) 1 (25) - - -
Table D 27 3/4 (705) 25 1/4 (641) 16 7/8 (22) 1 (25) - - -
Table E 27 3/4 (705) 25 1/4 (641) 16 7/8 (22) 1 (25) - - 1 1/4 (32)
Table F 29 (737) 261/2 (673) 24 1 1/8 (29) 1 1/4 (32) - - 1 1/2 (38)
Table H 29 (737) 261/2 (673) 24 1 1/8 (29) 1 1/4 (32) 231/2 (597) 1/16 2 (51)