Product Manual

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Table A3: Standard Classes of Cast Iron Pipe
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Nominal
Pipe Size
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(in.)
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Class A Class B Class C Class D
Outer
Diameter
(in.)
Wall
Thickness
(in.)
Outer
Diameter
(in.)
Wall
Thickness
(in.)
Outer
Diameter
(in.)
Wall
Thicknes
s
(in.)
Outer
Diameter
(in.)
Wall
Thickness
(in.)
3 3.80 0.39 3.96 0.42 3.96 0.45 3.96 0.48
4 4.80 0.42 5.00 0.45 5.00 0.48 5.00 0.52
6 6.90 0.44 7.10 0.48 7.10 0.51 7.10 0.55
8 9.05 0.46 9.05 0.51 9.30 0.56 9.30 0.60
10 11.10 0.50 11.10 0.57 11.40 0.62 11.40 0.68
12 13.20 0.54 13.20 0.62 13.50 0.68 13.50 0.75
14 15.30 0.57 15.30 0.66 15.65 0.74 15.65 0.82
16 7.40 0.60 17.40 0.70 17.80 0.80 17.80 0.89
18 19.50 0.64 19.50 0.75 19.92 0.87 19.92 0.96
20 21.60 0.67 21.60 0.80 22.06 0.92 22.06 1.03
24 25.80 0.76 25.80 0.89 26.32 1.05 26.32 1.16
30 31.74 0.88 32.00 1.03 32.40 1.20 32.74 1.37
32 37.96 0.99 38.30 1.15 38.70 1.36 39.16 1.58
42 44.20 1.10 44.50 1.28 45.10 1.54 45.58 1.78
48 50.50 1.26 50.80 1.42 51.40 1.71 51.98 1.99
54 56.66 1.35 57.10 1.55 57.80 1.90 58.40 2.23
60 62.80 1.39 63.40 1.67 64.20 2.00 64.82 2.38
72 75.34 1.62 76.00 1.95 76.88 2.39
84 87.54 1.72 88.54 2.22