Home Reference Manual Dimensions of the steel Flanges DN250-10"
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Dimensions of the steel Flanges DN 250 - 10"

 


n° - number of holes
dia - diameter of bolts

 

Flange standard PN
Rating		 D K L n° dia c d f
UNI 2223
DIN 2501
BS 4504
NF E 29-203*
ISO/DIS 7005-1.2*		 2,5-6 375 335 18 12 M16 22 312 3
10 395 350 22 12 M20 26 320 3
16 405 355 26 12 M24 26 320 3
25 425 370 30 12 M27 32 335 3
40 450 385 33 12 M30 38 345 3
64 470 400 36 12 M33 46 325
 3
100 505 430 39 12 M36 60 325
 3
ISO/DIS 7005-1.2
NF E 29-203		 20 405 362,0 26,0 12 M24 30,5 324 2
50 445 387,5
 29,5 16 M27 48,0 324 2
100 510 432,0 35,5 16 M33 63,5 324 7**
ANSI B 16.5
BS 1560		 150 16,00
(406,4)		 14,25
(362,0)		 1,00
(25,4)		 12 0,88
(22,2)		 1,19
(30,2)		 12,75
(323,8)		 0,06
(1.6)
300 17,50
(444,5)		 15,25
(387,3)
 1,12
(28,6)		 16 1,00
(25,4)		 1,88
(47,6)		 12,75
(323,8)		 0,06
(1,6)
400 17,50
(444,5)		 15,25
(387,3)		 1,25
(31,7)		 16 1,12
(28,6)		 2,12
(54,0)		 12,75
(323,8)		 0,25**
(6,4)
600 20,00
(508,0)		 17,00
(431,8)		 1,38
(34,9)		 16 1,25
(31,7)		 2,50
(63,5)		 12,75
(323,8)		 0,25**
(6,4)
900 21,50
(546,1)		 18,50
(469,9)		 1,50
(38,1)		 16 1,38
(34,9)		 2,75
(69,8)
 12,75
(323,8)		 0,25**
(6,4)
BS 10
AS 2129		 A 16
(406,4)		 14
(355,6)		 ⅞
(22,2)		 8 ¾
(19,0)		 ⅝
(15,9)		 — —
D 16
(406,4)		 14
(355,6)		 ⅞
(22,2)		 8 ¾
(19,0)		 ¾
(19,0)		 — —
E 16
(406,4)		 14
(355,6)		 ⅞
(22,2)		 12 ¾
(19,0)		 ⅞
(22,2)		 — —
F 17
(431,8)
 15
(381,0)		 1
(25,4)		 12 ⅞
(22,2)		 1
(25,4)		 — —
H 17
(431,8)		 15
(381,0)		 1
(25,4)		 12 ⅞
(22,2)		 1⅜
(34,9)		 12¼
(311,1)		 1/16
(1.6)
J 17
(431,8)		 15
(381,0)		 1⅛
(28,6)		 12 1
(25,4)		 1⅞
(47,6)
 12¼
(311,1)		 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