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Dimensions of the steel Flanges DN 350 - 14"
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 |
490 |
445 |
22 |
12 |
M20 |
26 |
415 |
4 |
| 10 |
505 |
460 |
22 |
16 |
M20 |
28 |
430 |
4 |
| 16 |
520 |
470 |
26 |
16 |
M24 |
30 |
438 |
4 |
| 25 |
555 |
490 |
33 |
16 |
M30 |
38 |
450 |
4 |
| 40 |
580 |
510 |
36 |
16 |
M33 |
46 |
465 |
4 |
| 64 |
600 |
525 |
39 |
16 |
M36 |
56 |
435
|
4 |
| 100 |
655 |
560 |
48 |
16 |
M45 |
74 |
435
|
4
|
ISO/DIS 7005-1.2
NF E 29-203 |
20 |
535 |
476,0 |
29,5 |
12 |
M27 |
35 |
413 |
2 |
| 50 |
585 |
514,5
|
32,5 |
20 |
M30 |
54 |
413 |
2 |
| 100 |
605 |
527,0 |
39,0 |
20 |
M36 |
70 |
413 |
7** |
ANSI B 16.5
BS 1560 |
150 |
21,00
(533,4) |
18,75
(476,2) |
1,12
(28,6) |
12 |
1,00
(25,4) |
1,38
(34,9) |
16,25
(412,8) |
0,06
(1.6) |
| 300 |
23,00
(584,2) |
20,25
(514,4)
|
1,25
(31,7) |
20 |
1,12
(28,6) |
2,12
(54,0) |
16,25
(412,8) |
0,06
(1,6) |
| 400 |
23,00
(584,2) |
20,25
(514,4) |
1,38
(34,9) |
20 |
1,25
(31,7) |
2,38
(60,3) |
16,25
(412,8) |
0,25**
(6,4) |
| 600 |
23,75
(603,2) |
20,75
(527,0) |
1,50
(38,1) |
20 |
1,38
(34,9) |
2,75
(69,8) |
16,25
(412,8) |
0,25**
(6,4) |
| 900 |
25,25
(641,3) |
22,00
(558,8) |
1,62
(41,3) |
20 |
1,50
(38,1) |
3,38
(85,7)
|
16,25
(412,8) |
0,25**
(6,4) |
BS 10
AS 2129 |
A |
20¾
(527,0) |
18⅛
(469,9) |
1
(25,4) |
8 |
⅞
(22,2) |
⅞
(22,2) |
— |
— |
| D |
20¾
(527,0) |
18⅛
(469,9) |
1
(25,4) |
12 |
⅞
(22,2) |
1
(25,4) |
— |
— |
| E |
20¾
(527,0) |
18⅛
(469,9) |
1
(25,4) |
12 |
⅞
(22,2) |
1
(25,4) |
— |
— |
| F |
21¾
(552,5)
|
19⅛
(495,3) |
1⅛
(28,6) |
16 |
1
(25,4) |
1¼
(31,8) |
— |
— |
| H |
21¾
(552,5) |
19⅛
(495,3) |
1⅛
(28,6) |
16 |
1
(25,4) |
1⅝
(41,3) |
16½
(419,1) |
1/16
(1.6) |
| J |
21¾
(552,5) |
19⅛
(495,3) |
1¼
(31,8) |
16 |
1½
(38,1) |
2⅛
(54,0)
|
16½
(419,1) |
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
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Reference Manual 
