Ductile Iron Back-up Flanges

ASTM A-536 Ductile Iron Back-up FlangesDuctile Iron Back-up Flanges
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(size 22.6Kb)
Nominal
size
Inside
Diameter
(ID)
Outside
Diameter
(OD)
Thickness
(T)
Bolt
Circle
(BC)
Hole
Diameter
No. of
Bolt
Holes
45 Degree
Bevel
(B)
Weight
Each
(lbs)
AFR IPS Drilling Pattern #150
1/2 0.90 3.50 0.50 2.38 0.625 4 0.250 1.0
3/4   1.11 3.88 0.50 2.75 0.625 4 0.250 1.4
1 1.75 1.38 4.25 0.50 3.13 0.625 4 0.250 1.7
1 1/4 2.00 1.72 4.63 0.50 3.50 0.625 4 0.250 1.8
1 1/2 2.25 1.97 5.00 0.50 3.88 0.625 4 0.250 2.0
2 2.80 2.46 6.00 0.50 4.75 0.750 4 0.250 3.0
2 1/2 3.31 2.97 7.00 0.50 5.50 0.750 4 0.250 3.9
3 3.94 3.60 7.50 0.50 6.00 0.750 4 0.250 4.0
4 4.94 4.60 9.00 0.56 7.50 0.750 8 0.250 6.5
5 6.10 5.69 10.00 0.63 8.50 0.875 8 0.250 7.0
6 7.20 6.75 11.00 0.63 9.50 0.875 8 0.250 8.0
8 9.25 8.75 13.50 0.63 11.75 0.875 8 0.312 11.5
10 11.44 10.95 16.00 0.63 14.25 1.000 12 0.312 15.0
12 13.44 12.95 19.00 0.75 17.00 1.000 12 0.312 26.0
14 14.81 14.20 21.00 0.75 18.75 1.125 12 0.312 34.0
16 16.91 16.20 23.50 0.75 21.25 1.125 16 0.375 37.0
18 18.91 18.20 25.00 0.88 22.75 1.250 16 0.375 42.0
20 20.91 20.25 27.50 0.88 25.00 1.250 20 0.375 51.0
24 24.91 24.25 32.00 1.00 29.50 1.375 20 0.375 76.0
30 30.91 30.25 38.75 1.00 36.00 1.375 28 0.500 104.0
36 36.91 36.25 46.00 1.13 42.75 1.625 32 0.500 150.0
42 42.91 42.28 53.00 1.25 49.50 1.625 36 0.500 208.0
48 48.91 48.28 59.50 1.25 56.00 1.625 44 0.500 246.0

Physical Properties (minimum)
Tensile Strength: 65,000 psi
Yield Strength: 45,000 psi
Elongation: 10%

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