Home Reference Manual Dimensions of the steel Flanges DN300-12"
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Dimensions of the steel Flanges DN 300 - 12"

 


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*		 2,5-6 440 395 22 12 M20 24 365 4
10 445 400 22 12 M20 26 370 4
16 460 410 26 12 M24 28 378 4
25 485 430 30 16 M27 34 390 4
40 515 450 33 16 M30 42 410 4
64 530 460 36 16 M33 52 375
 4
100 585 500 42 16 M39 68 375
ISO/DIS 7005-1.2
NF E 29-203		 20 485 432 26,0 12 M24 32 324 2
50 520 451
 32,5 16 M30 51 324 2
100 560 489 35,5 20 M33 67 324 7**
ANSI B 16.5
BS 1560		 150 19,00
(482,6)		 17,00
(431,8)		 1,00
(25,4)		 12 0,88
(22,2)		 1,25
(31,7)		 12,75
(323,8)		 0,06
(1.6)
300 20,50
(520,7)		 17,75
(450,8)
 1,25
(31,7)		 16 1,12
(28,6)		 2,00
(50,8)		 12,75
(323,8)		 0,06
(1,6)
400 20,50
(520,7)		 17,75
(450,8)		 1,38
(34,9)		 16 1,25
(31,7)		 2,25
(57,1)		 12,75
(323,8)		 0,25**
(6,4)
600 22,00
(558,8)		 19,25
(488,9)		 1,38
(34,9)		 20 1,25
(31,7)		 2,62
(66,7)		 12,75
(323,8)		 0,25**
(6,4)
900 24,00
(609,6)		 21,00
(533,4)		 1,50
(38,1)		 20 1,38
(34,9)		 3,12
(79,4)
 12,75
(323,8)		 0,25**
(6,4)
BS 10
AS 2129		 A 18
(457,2)		 16
(406,4)		 ⅞
(22,2)		 8 ¾
(19,0)		 ¾
(19,0)		 — —
D 18
(457,2)		 16
(406,4)		 ⅞
(22,2)		 12 ¾
(19,0)		 ⅞
(22,2)		 — —
E 18
(457,2)		 16
(406,4)		 1
(25,4)		 12 ⅞
(22,2)		 1
(25,4)		 — —
F 19¼
(489,0)
 17¼
(438,2)		 1
(25,4)		 16 ⅞
(22,2)		 1⅛
(28,6)		 — —
H 19¼
(489,0)		 17¼
(438,2)		 1
(25,4)		 16 ⅞
(22,2)		 1½
(38,1)		 14½
(368,3)		 1/16
(1.6)
J 19¼
(489,0)		 17¼
(438,2)		 1⅛
(28,6)		 16 1
(25,4)		 2
(50,8)
 14½
(368,3)		 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