ANSI/ASME B16.5 Class 300 Forged Flanges

ANSI/ASME B16.5 Class 300 Forged FlangesANSI/ASME B16.5 Class 300 Forged Flanges
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(size 63.8Kb)
Nom.
Pipe
Size
Outside
Dia
(OD)
Min
Thickness
(T)
RF
Dia
( R )
# of
Holes
Dia
of
Holes
Bolt
Circle Dia
(BC)
So Bore
ID
(SB)
WN Bore
ID
(WB)
Dia
Hub Base
(HB)
Dia
Hub Top
(HT)
SO
LTH
(SL)
WN
LTH
(WL)
½ 3.75 0.50 1.38 4.00 0.63 2.62 0.88 0.62 1.50 0.84 0.81 2.00
¾ 4.62 0.56 1.69 4.00 0.75 3.25 1.09 0.82 1.88 1.05 0.94 2.19
1 4.88 0.62 2.00 4.00 0.75 3.50 1.36 1.05 2.12 1.32 1.00 2.38
5.25 0.69 2.50 4.00 0.75 3.88 1.70 1.38 2.50 1.66 1.00 2.50
6.12 0.75 2.88 4.00 0.88 4.50 1.95 1.61 2.75 1.90 1.13 2.63
2 6.50 0.81 3.62 8.00 0.75 5.00 2.44 2.07 3.31 2.38 1.25 2.69
7.50 0.94 4.12 8.00 0.88 5.88 2.94 2.47 3.94 2.88 1.44 2.94
3 8.25 1.06 5.00 8.00 0.88 6.62 3.57 3.07 4.62 3.50 1.63 3.06
9.00 1.12 5.50 8.00 0.88 7.25 4.07 3.55 5.25 4.00 1.69 3.13
4 10.00 1.19 6.19 8.00 0.88 7.88 4.57 4.03 5.75 4.50 1.82 3.32
5 11.00 1.31 7.31 8.00 0.88 9.25 5.66 5.05 7.00 5.56 1.94 3.82
6 12.50 1.38 8.50 12.00 0.88 10.62 6.72 6.07 8.12 6.63 2.00 3.82
8 15.00 1.56 10.62 12.00 1.00 13.00 8.72 7.98 10.25 8.63 2.38 4.32
10 17.50 1.81 12.75 16.00 1.12 15.25 10.88 10.02 12.62 10.75 2.56 4.56
12 20.50 1.94 15.00 16.00 1.25 17.75 12.88 12.00 14.75 12.75 2.82 5.06
14 23.00 2.06 16.25 20.00 1.25 20.25 14.14 13.25 16.75 14.00 2.94 5.56
16 25.50 2.19 18.50 20.00 1.38 22.50 16.16 15.25 19.00 16.00 3.19 5.69
18 28.00 2.31 21.00 24.00 1.38 24.75 18.18 17.25 21.00 18.00 3.44 6.19
20 30.50 2.44 23.12 24.00 1.38 27.00 20.20 19.25 23.12 20.00 3.69 6.32
22 33.00 2.57 25.25 24.00 1.63 29.25 22.22 21.25 25.25 22.00 3.93 6.43
24 36.00 2.69 27.62 24.00 1.63 32.00 24.25 23.25 27.62 24.00 4.13 6.56

DIMENSIONS ARE IN INCHES
Bolt hole diameter 1/8" larger than bolt diameter
Standard bore dimensions provided. See bore chart for other wall thicknesses

The purchaser shall specify the ID of the flange for nominal pipe sizes 26 in. and larger. The diameter of
the flange bore shall not exceed the pipe OD by more than .25 in.

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