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| ANSI B16.5 Class 400 Forged Flanges |
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| Weld Neck Forged Flange |
Threaded Forged Flange |
Lap Joint Forged Flange |
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| Socket Weld Forged Flange |
Blind Forged Flange |
Slip On Forged Flange |
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Nom. Pipe Size |
O |
T |
R |
X |
#/Dia of Holesa |
Bolt Circle Dia |
B |
B2b |
B3 |
H |
L |
L2 |
L3c |
r |
C |
D |
Thr |
| ½ |
3.75 |
0.56 |
1.38 |
1.50 |
4-0.63 |
2.62 |
0.88 |
|
0.90 |
0.84 |
0.88 |
2.06 |
0.88 |
0.12 |
0.93 |
0.38 |
0.62 |
| ¾ |
4.62 |
0.62 |
1.69 |
1.88 |
4-0.75 |
3.25 |
1.09 |
1.11 |
1.05 |
1.00 |
2.25 |
1.00 |
0.12 |
1.14 |
0.44 |
0.62 |
| 1 |
4.88 |
0.69 |
2.00 |
2.12 |
4-.075 |
3.50 |
1.36 |
1.38 |
1.32 |
1.06 |
2.44 |
1.06 |
0.12 |
1.41 |
0.50 |
0.69 |
| 1¼ |
5.25 |
0.81 |
2.50 |
2.50 |
4-0.75 |
3.88 |
1.70 |
1.72 |
1.66 |
1.12 |
2.62 |
1.12 |
0.19 |
1.75 |
0.56 |
0.81 |
| 1½ |
6.12 |
0.88 |
2.88 |
2.75 |
4-0.88 |
4.50 |
1.95 |
1.97 |
1.90 |
1.25 |
2.75 |
1.25 |
0.25 |
1.99 |
0.62 |
0.88 |
| 2 |
6.50 |
1.00 |
3.62 |
3.31 |
8-0.75 |
5.00 |
2.44 |
2.46 |
2.38 |
1.44 |
2.88 |
1.44 |
0.31 |
2.50 |
0.69 |
1.12 |
| 2½ |
7.50 |
1.12 |
4.12 |
3.94 |
8-0.88 |
5.88 |
2.94 |
2.97 |
2.88 |
1.62 |
3.12 |
1.62 |
0.31 |
3.00 |
0.75 |
1.25 |
| 3 |
8.25 |
1.25 |
5.00 |
4.62 |
8-0.88 |
6.62 |
3.57 |
3.60 |
3.50 |
1.81 |
3.25 |
1.81 |
0.38 |
3.63 |
0.81 |
1.38 |
| 3½ |
9.00 |
1.38 |
5.50 |
5.25 |
8-1.00 |
7.25 |
4.07 |
4.10 |
4.00 |
1.94 |
3.38 |
1.94 |
0.38 |
4.13 |
…. |
1.56 |
| 4 |
10.00 |
1.38 |
6.19 |
5.75 |
8-1.00 |
7.88 |
4.57 |
4.60 |
4.50 |
2.00 |
3.50 |
2.00 |
0.44 |
4.63 |
…. |
1.44 |
| 5 |
11.00 |
1.50 |
7.31 |
7.00 |
8-1.00 |
9.25 |
5.66 |
5.69 |
5.56 |
2.12 |
4.00 |
2.12 |
0.44 |
5.69 |
…. |
1.69 |
| 6 |
12.50 |
1.62 |
8.50 |
8.12 |
12-1.00 |
10.62 |
6.72 |
6.75 |
6.63 |
2.25 |
4.06 |
2.25 |
0.50 |
6.75 |
…. |
1.81 |
| 8 |
15.00 |
1.88 |
10.62 |
10.25 |
12-1.12 |
13.00 |
8.72 |
8.75 |
8.63 |
2.69 |
4.62 |
2.69 |
0.50 |
8.75 |
…. |
2.00 |
| 10 |
17.50 |
2.12 |
12.75 |
12.62 |
16-1.25 |
15.25 |
10.88 |
10.92 |
10.75 |
2.88 |
4.88 |
4.00 |
0.50 |
10.88 |
…. |
2.19 |
| 12 |
20.50 |
2.25 |
15.00 |
14.75 |
16-1.38 |
17.75 |
12.88 |
12.92 |
12.75 |
3.12 |
5.38 |
4.25 |
0.50 |
12.94 |
…. |
2.38 |
| 14 |
23.00 |
2.38 |
16.25 |
16.75 |
20-1.38 |
20.25 |
14.14 |
14.18 |
14.00 |
3.31 |
5.88 |
4.62 |
0.50 |
14.19 |
…. |
2.50 |
| 16 |
25.50 |
2.50 |
18.50 |
19.00 |
20-1.50 |
22.50 |
16.16 |
16.19 |
16.00 |
3.69 |
6.00 |
5.00 |
0.50 |
16.19 |
…. |
2.69 |
| 18 |
28.00 |
2.62 |
21.00 |
21.00 |
24-1.50 |
24.75 |
18.18 |
18.20 |
18.00 |
3.88 |
6.50 |
5.38 |
0.50 |
18.19 |
…. |
2.75 |
| 20 |
30.50 |
2.75 |
23.00 |
23.12 |
24-1.62 |
27.00 |
20.20 |
20.25 |
20.00 |
4.00 |
6.62 |
5.75 |
0.50 |
20.19 |
…. |
2.88 |
| 22 |
33.00 |
2.88 |
25.25 |
25.25 |
24-1.75 |
29.25 |
22.22 |
22.25 |
22.00 |
4.25 |
6.75 |
6.00 |
0.50 |
…. |
…. |
-- |
| 24 |
36.00 |
3.00 |
27.25 |
27.62 |
24-1.88 |
32.00 |
24.25 |
24.25 |
24.00 |
4.50 |
6.88 |
6.25 |
0.50 |
24.19 |
…. |
3.25 |
| Dimensions are in inches. |
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| (a)- Bolt hole diameter 1/8 in. larger than bolt diameter. |
| (b)- See bore chart for wall thicknesses. |
| (c)- This dimension is commonly associated with "true" lap joints. Industry standard is to make to the slip on length through the hub. |
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| ANSI B16.5 Forged 1/2"-24" Flange Classes |
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| Class 150 |
Class 300 |
Class 400 |
| Class 600 |
Class 900 |
Class 1500 |
| Class 2500 |
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Copyright © 2012 Falcon Valves & Flanges Pvt Ltd. All Rights Reserved. |
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