Dimensions of PN Flanges - Steel PN40

PN40, PN25 & PN16

 
This diagram illustrated the arrangement but not necessarily the correct number of bolt holes.
Refer to the column 'Bolting number' in the table for the actual number.
For raised face diameter and different types of flange faces see: Dimensions of PN Flange Faces - Steel
 
Dimensions of PN40 Flanges
 
Nominal
Size

DN

 Mating
Dimensions		                          
Outside
Diameter
D [mm]		 Diameter of
Bolt Circle
K [mm]		 Diameter of
Bolt Hole
L    [mm]		 Bolting
Number		 Bolting
Size		 Flange
Thickness
C [mm]
15 95 65 14 5 m12 16
20 105 75 14 4 M12 18
25 115 85 14 4 M12 18
32 140 100 18 4 M16 18
40 150 110 18 4 M16 18
50 165 125 18 4 M16 20
65 185 145 18 8 M16 22
80 200 160 18 8 M16 24
100 235 190 22 8 M20 24
125 270 220 26 8 M24 26
150 300 250 26 8 M24 28
200 375 320 30 12 M27 34
250 450 385 33 12 M30 38
300 515 450 33 16 M30 42
350 580 510 36 16 M33 46
400 660 585 39 16 M36 50