DIMENSION TABLES FOR 25mm (1 Inch) FLANGES

Dimensional tables for PN, ANSI and BS10 DN25mm (1 Inch) flanges.

Dimensions Tables for Flanges
DIMENSION TABLES FOR 25mm (1 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 6 100 75 4 M10 11 60 2 14
PN 10 115 85 4 M12 14 68 2 18
PN 16 115 85 4 M12 14 68 2 18
PN 25 115 85 4 M12 14 68 2 18
PN 40 115 85 4 M12 14 68 2 18
PN 64 140 100 4 M16 18 68 2 24
PN 100 140 100 4 M16 18 68 2 24

ANSI

Class 125 / 150 4 1/4 (114) 3 1/8 (79) 4 1/2 (13) 5/8 (16) 2 (51) 1/16 (2) 7/16 (11)
Class 300 4 7/8 (124) 3 1/2 (89) 4 5/8 (16) 3/4 (19) 2 (51) 1/16 (2) 11/16 (17)
Class 600 4 7/8 (124) 3 1/2 (89) 4 5/8 (16) 3/4 (19) 2 (51) 1/4 (6) 11/16 (17)
Class 900 5 7/8 (149) 4 (102) 4 7/8 (22) 1 (25) 2 (51) 1/4 (6) 11/8 (29)
Class 1500 5 7/8 (149) 4 (102) 4 7/8 (22) 1 (25) 2 (51) 1/4 (6) 11/8 (29)

BS 10

Table A 4 1/2 (114) 3 1/4 (83) 4 1/2 (13) 9/16 (14) - - -
Table D 4 1/2 (114) 3 1/4 (83) 4 1/2 (13) 9/16 (14) - - 3/8 (10)
Table E 4 1/2 (114) 3 1/4 (83) 4 1/2 (13) 9/16 (14) - - 3/8 (10)
Table F 4 3/4 (121) 3 7/16 (87) 4 5/8 (16) 11/16 (17) - - 3/8 (10)
Table H 4 3/4 (121) 3 7/16 (87) 4 5/8 (16) 11/16 (17) 2 1/2 (64) 1/16 (2) 9/16 (14)