Western Forge & Flange Co.
687 County Road 2201
Cleveland, TX 77327
Phone: (800) 352-6433
Fax: (281) 727-7060
Email:
sales@western-forge.com
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Flanges
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Class 400
Class 400
ANSI B16.5 Class 400 Forged Flange
Nom Pipe Size
Flange O.D.
Flange Thick
Dia. of Raised Face
Hub Dia.
Length Thru Hub
Min Thread Length
Dia. Of Bore
Dia. Hub at bevel
Fillet Radius
Depth of Socket
Dia. Counter Bore
Bolt Circle Dia.
No Holes
WN
SO TH SW
LJ
WN SW
SO SW
LJ
/
O
T
R
X
Y1
Y2
Y3
H
B1
B2
B3
A
r
D
C
Dia. Holes
1/2
3.75
0.56
1.38
1.50
2.06
0.88
0.88
0.62
0.88
0.90
0.84
0.12
0.38
0.93
2.62
4
-
0.62
3/4
4.62
0.62
1.69
1.88
2.25
1.00
1.00
0.62
1.09
1.11
1.05
0.12
0.44
1.14
3.25
4
-
0.75
1
4.88
0.69
2.00
2.12
2.44
1.06
1.06
0.69
1.36
1.38
1.32
0.12
0.50
1.41
3.50
4
-
0.75
1 1/4
5.25
0.81
2.50
2.50
2.62
1.12
1.12
0.81
1.70
1.72
1.66
0.19
0.56
1.75
3.88
4
-
0.75
1 1/2
6.12
0.88
2.88
2.75
2.75
1.25
1.25
0.88
1.95
1.97
1.90
0.25
0.62
2.00
4.50
4
-
0.88
2
6.50
1.00
3.62
3.31
2.88
1.44
1.44
1.12
2.44
2.46
2.38
0.31
0.69
2.50
5.00
8
-
0.75
2 1/2
7.50
1.12
4.12
3.94
3.12
1.62
1.62
1.25
2.94
2.97
2.88
0.31
0.75
3.00
5.88
8
-
0.88
3
8.25
1.25
5.00
4.62
3.25
1.81
1.81
1.38
3.57
3.60
3.50
0.38
0.81
3.63
6.62
8
-
0.88
3 1/2
9.00
1.38
5.50
5.25
3.38
1.94
1.94
1.56
4.07
4.10
4.00
0.38
4.13
7.25
8
-
1.00
4
10.00
1.38
6.19
5.75
3.50
2.00
2.00
1.44
4.57
4.60
4.50
0.44
4.63
7.88
8
-
1.00
5
11.00
1.50
7.31
7.00
4.00
2.12
2.12
1.69
5.66
5.69
5.56
0.44
5.69
9.25
8
-
1.00
6
12.50
1.62
8.50
8.12
4.06
2.25
2.25
1.81
6.72
6.75
6.63
0.50
6.75
10.62
12
-
1.00
8
15.00
1.88
10.62
10.25
4.62
2.69
2.69
2.00
8.72
8.75
8.63
0.50
8.75
13.00
12
-
1.13
10
17.50
2.12
12.75
12.62
4.88
2.88
4.00
2.19
10.88
10.92
10.75
0.50
10.88
15.25
16
-
1.25
12
20.50
2.25
15.00
14.75
5.38
3.12
4.25
2.38
12.88
12.92
12.75
0.50
12.94
17.75
16
-
1.38
14
23.00
2.38
16.25
16.75
5.88
3.31
4.62
2.50
14.14
14.18
14.00
0.50
14.19
20.25
20
-
1.38
16
25.50
2.50
18.50
19.00
6.00
3.69
5.00
2.69
16.16
16.19
16.00
0.50
16.19
22.50
20
-
1.50
18
28.00
2.62
21.00
21.00
6.50
3.88
5.38
2.75
18.18
18.20
18.00
0.50
18.19
24.75
24
-
1.50
20
30.50
2.75
23.00
23.12
6.62
4.00
5.75
2.88
20.20
20.25
20.00
0.50
20.19
27.00
24
-
1.62
22
33.00
2.88
25.25
25.25
6.75
4.25
6.00
22.22
22.25
22.00
0.50
29.25
24
-
1.75
24
36.00
3.00
27.25
27.62
6.88
4.50
6.25
3.25
24.25
24.25
24.00
0.50
24.19
32.00
24
-
1.88
1-
1/4 in. raised face is not included in dimensions T, Y1, and Y2.
2-
This dimension is for"true" Lap Joint. Lap joint flanges can also be made to slip-on lengths
3-
Flange dimensions and drilling are accordance with ANSI B16.5 steel flange standard.
4-
Socket Weld type flanges conform to ANSI B16.5 for sizes 1/2" through 3". Larger sizes are not covered by B16,5, but can be manufactured upon request.
5-
Flange dimensions and drilling for 22" size are interpolated dimensions given in MSS-SP-44
Dimensional Data
Class 150
Class 300
Class 400
Class 600
Class 900
Class 1500
Class 2500
B16.47
Series A Class 150
Series A Class 300
Series A Class 400
Series A Class 600
Series A Class 900
Series B Class 150
Series B Class 300
Series B Class 400
Series B Class 600
Series B Class 900
Pipe Dimensions
Flange Tolerances
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