Dimensions of the steel Flanges DN500-20" Print
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Dimensions of the steel Flanges DN 500 - 20"

 


n° - number of holes
dia - diameter of bolts

Flange standard PN
Rating
D K L dia c d f
UNI 2223
DIN 2501
BS 4504
NF E 29-203*
ISO/DIS 7005-1.2*
2,5-6 645 600 22 20 M20 28 570 4
10 670 620 26 20 M24 28 585 4
16 715 650 33 20 M30 36 610 4
25 730 660 36 20 M33 44 615 4
40 755 670 42 20 M39 52 615 4
64 800 705 48 20 M46 68 590
4
100 870 760 56 20 M54 94 590
4
ISO/DIS 7005-1.2
NF E 29-203
20 700 635 32,5 20 M30 43,0 584,5 2
50 775 686
35,5 24 M33 63,5 584,5 2
100 815 724 45,0 24 M42 89,0 584,5 7**
ANSI B 16.5
BS 1560
150 27,50
(698,5)
25,00
(635,0)
1,25
(31,7)
20 1,12
(28,6)
1,69
(17,5)
23,00
(584,2)
0,06
(1.6)
300 30,50
(774,7)
27,00
(685,8)
1,38
(34,9)
24 1,25
(31,8)
2,50
(63,5)
23,00
(584,2)
0,06
(1,6)
400 30,50
(774,7)
27,00
(685,8)
1,62
(41,3)
24 1,50
(38,1)
2,75
(69,8)
23,00
(584,2)
0,25**
(6,4)
600 32,00
(812,8)
28,50
(723,9)
1,75
(44,4)
24 1,62
(41,3)
3,50
(88,9)
23,00
(584,2)
0,25**
(6,4)
900 33,75
(857,2)
29,50
(749,3)
2,12
(54,0)
20 2,00
(50,8)
4,12
(107,9)
23,00
(584,2)
0,25**
(6,4)
BS 10
AS 2129
A 27¾
(704,9)
25¼
(641,4)
1
(25,4)
12
(22,2)
1
(25,4)
D 27¾
(704,9)
25¼
(641,4)
1
(25,4)
16
(22,2)

(31,8)
E 27¾
(704,9)
25¼
(641,4)
1
(25,4)
16
(22,2)

(31,8)
F 29
(736,6)
26½
(673,1)

(31,8)
24 1⅛
(28,7)

(38,1)
H 29
(736,6)
26½
(673,1)

(31,8)
24 1⅛
(28,7)
2
(50,8)
23½
(596,9)
1/16
(1.6)
J 29
(736,6)
26½
(673,1)
1⅜
(34,9)
24
(31,8)

(63,5)
23½
(596,9)
1/16
(1.6)
Note - The dimensions of ANSI - BS -AS flanges are in inch; the others are in mm (the ones in brackets included which are derived from the dimensions in inch)
* For ratings 2,5-6-10-16-25-40 only
** To be added to the thickness C of the flange