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MILD STEEL FLANGES
JIS B2220 10K
| Nominal
Bore of Flange |
Outside
Dia. of Applicable Pipe |
Inside
Dia. of Flange do |
Inside
Dia. of Flange D |
Sectional
Dimension of Flange |
Dia.of
Bolt |
Nominal
Bolt Size |
Welaing
(Reference) |
Weight
(kg w) |
| t |
T |
Dia.of
hub |
Radius
r |
Dia.of
Bolt Circle C |
Number
of Bolt Holes |
Hole
Diameter h |
W1 |
W2 |
| a |
b |
| 10
15
20
25
32
|
17.3
21.3
27.2
34
42.7
|
17.8
22.2
27.2
34.5
43.2
|
90
95
100
125
135
|
12
12
14
14
16
|
-
-
-
-
-
|
-
-
-
-
-
|
-
-
-
-
-
|
-
-
-
-
-
|
65
70
75
90
100
|
4
4
4
4
4
|
15
15
15
19
19
|
M12
M12
M12
M16
M16
|
5
5
5
5
6
|
2.5
3
3
3
3
|
0.52
0.57
0.73
1.13
1.48
|
| 40
50
65
80
(90)
|
48.6
60.5
76.3
89.1
101.6
|
49.1
61.1
77.1
90
102.6
|
140
155
175
185
195
|
16
16
18
18
18
|
-
-
-
-
-
|
-
-
-
-
-
|
-
-
-
-
-
|
-
-
-
-
-
|
105
120
140
150
160
|
4
4
4
8
8
|
19
19
19
19
19
|
M16
M16
M16
M16
M16
|
6
6
6.5
6.5
6.5
|
3
3
4
4
4
|
1.56
1.88
2.6
2.61
2.76
|
| 100
125
150
(175)
200
|
114.3
139.8
165.2
190.7
216.3
|
115.4
141.2
166.6
192.1
218
|
210
250
280
305
330
|
18
20
22
22
22
|
-
-
-
-
-
|
-
-
-
-
-
|
-
-
-
-
-
|
-
-
-
-
-
|
175
210
240
265
290
|
8
8
8
12
12
|
19
23
23
23
23
|
M16
M20
M20
M20
M20
|
7
7.5
8
9
9
|
4
4
5
5
6
|
3.14
4.77
6.34
6.82
7.53
|
| (225)
250
300
|
241.8
267.4
.67.4
318.5
318.5
|
243.7
269.5
269.5
321
321
|
350
400
400
445
445
|
22
24
24
26
24
|
-
-
36
-
38
|
-
-
288
-
340
|
-
-
292
-
346
|
-
-
6
-
6
|
310
355
355
400
400
|
12
12
12
16
16
|
23
25
25
25
25
|
M20
M22
M22
M22
M22
|
9
10
10
10
10
|
6
6
6
6
6
|
7.74
11.8
12.7
13.6
13.8
|
| 350
400
450
500550
|
355.6
406.4
457.2
508
558.8
|
358.1
409
460
511
562
|
490
560
620
675
745
|
26
28
30
30
32
|
42
44
48
48
52
|
380
436
496
548
604
|
386
442
502
554
610
|
6
6
6
6
6
|
445
510
565
620
680
|
16
16
20
20
20
|
25
27
27
27
33
|
M22
M24
M24
M24
M30
|
12
12
14
14
15
|
7
7
8
8
9
|
18.2
25.2
33
37.6
49.7
|
| 600
650
700
750
800
|
609.6
660.4
711.2
762
812.8
|
613
664
715
766
817
|
795
845
905
970
1020
|
32
34
36
36
|
52
56
58
692
64
|
656
706
762
812
868
|
662
712
770
824
876
|
6
6
6
6
6
|
730
780
840
900
950
|
24
24
24
24
28
|
33
33
33
33
33
|
M30
M30
M30
M30
M30
|
16
16
17
18
19
|
10
10
10
11
12
|
52.6
60.6
70.6
85.8
91.2
|
| (850)
900
1000
|
863.6
914.4
1016
|
868
919
1021
|
1070
1120
1235
|
36
38
40
|
66
70
74
|
920
971
1073
|
928
979
1081
|
6
6
6
|
1000
1050
1160
|
28
28
28
|
33
33
33
|
M30
M30
M36
|
19
22
22
|
12
14
14
|
98.6
109
133
|
NOTE:
For flanges 250 and 300 in nominal size, some are provided with
a hub, while others are not.
When using a flange, which has no hub , at pressure exceeding
10 kg/cm2 ,the thickness of the steel pipe to
be connected should be more than the nominal thickness of schedule
40.
REMARKS :
Flanges of parenthesized nominal sizes had better not be used
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