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Heavy Barrel Flange Dimensions

ASME B16.5 Heavy Barrel Flange Dimensions

Pipe Size
(NPS)		 Approx.
Weight		 Outside
Diameter
of
Flange
A		 Diameter
of
Raised
Face
B		 Thickness
of
Flange

C		 Diameter
of
Bore

D		 Diameter
of Hub
at Base

J		 Length
of
Hub

K		 Nut
Stop
Diameter

NS		 Nut
Relief
Diameter

NR
1 10 4 1/4 2 9/16 0.96 2 9 2 1/ 4 2
1 1/4 12 4 5/8 2 1/2 5/8 1.28 2 3/8 9 2 5/8 2 3/8
1 1/2 16 5 2 7/8 11/16 1.50 2 5/8 9 3 2 5/8
1/2 5 3 1/2 1 3/8 7/16 0.55 1 1/4 9 1 1/2 1 1/4
3/4 7 3 7/8 1 11/16 1/2 0.74 1 5/8 9 1 7/8 1 5/8
2 23 6 3 5/8 3/4 1.94 3 1/4 9 3 11/ 16 3 1/16
2 1/2 34 7 4 1/8 7/8 2.32 3 3/4 9 4 7/16 3 3/4
6 103 11 8 1/2 1 5.76 7 3/4 12 8 1/4 7 3/4
8 157 13 1/2 10 5/8 1 1/8 7.62 9 3/4 12 10 1/2 9 3/4
10 214 16 12 3/4 1 3/16 9.56 12 12 12 7/8 12
12 329 19 15 1 1/4 11.38 14 3/8 12 15 9/16 14 3/8
14 296 21 16 1/4 1 3/8 14.00 16 12 17 1/8 16
3 38 7 1/2 5 15/16 2.90 4 1/4 9 4 15/15 4 1/4
3 1/2 55 8 1/2 5 1/2 15/16 3.36 4 7/8 9 5 15/16 4 7/8
4 78 9 6 3/16 15/16 3.83 5 1/2 12 6 7/16 5 1/2
5 87 10 7 5/16 15/16 4.81 6 1/2 12 7 1/2 6 1/2
16 388 23 1/2 18 1/2 1 7/16 16.00 18 12 19 5/8 18
22 – – – – – – – – –
24 574 32 27 1/4 1 7/8 24.00 26 1/4 12 27 1/2 26 1/4
18 362 25 21 1 9/16 18.00 20 12 20 15/16 20
20 434 27 1/2 23 1 11/16 20.00 22 12 23 3/16 22
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