Cast Iron Pipe, Standard Classes, 3…20 inch
Size
in.
Class
in.
A B C D E F G H
3
OD 3.80 3.96 3.96 3.96
— — — —Wall 0.39 0.42 0.45 0.48
ID 3.02 3.12 3.06 3.00
4
OD 4.80 5.00 5.00 5.00
— — — —Wall 0.42 0.45 0.48 0.52
ID 3.96 4.10 4.04 3.96
6
OD 6.90 7.10 7.10 7.10 7.22 7.22 7.38 7.38
Wall 0.44 0.48 0.51 0.55 0.58 0.61 0.65 0.69
ID 6.02 6.14 6.08 6.00 6.06 6.00 6.08 6.00
8
OD 9.05 9.05 9.30 9.30 9.42 9.42 9.60 9.60
Wall 0.46 0.51 0.56 0.60 0.66 0.66 0.75 0.80
ID 8.13 8.03 8.18 8.10 8.10 8.10 8.10 8.00
10
OD 11.10 11.10 11.40 11.40 11.60 11.60 11.84 11.84
Wail 0.50 0.57 0.62 0.68 0.74 0.80 0.86 0.92
ID 10.10 9.96 10.16 10.04 10.12 10.00 10.12 10.00
12
OD 13.20 13.20 13.50 13.50 13.78 13.78 14.08 14.08
Wall 0.54 0.62 0.68 0.75 0.82 0.89 0.97 1.04
ID 12.12 11.96 12.14 12.00 12.14 12.00 12.14 12.00
14
OD 15.30 15.30 15.65 15.65 15.98 15.98 16.32 16.32
Wall 0.57 0.66 0.74 0.82 0.90 0.99 1.07 1.16
ID 14.16 13.98 14.17 14.01 14.18 14.00 14.18 14.00
16
OD 17.40 17.40 17.80 17.80 18.16 18.16 18.54 18.54
Wall 0.60 0.70 0.80 0.89 0.98 1.08 1.18 1.27
ID 16.20 16.00 16.20 16.02 16.20 16.00 16.18 16.00
18
OD 19.50 19.50 19.92 19.92 20.34 20.34 20.78 20.78
Wall 0.64 0.75 0.87 0.96 1.07 1.17 1.28 1.39
ID 18.22 18.00 18.18 18.00 18.20 18.00 18.22 18.00
20
OD 21.60 21.60 22.06 22.06 22.54 22.54 23.02 23.02
Wall 0.67 0.80 0.92 1.03 1.15 1.27 1.39 1.51
ID 20.26 20.00 20.22 20.00 20.24 20.00 20.24 20.00
Table 24: Cast iron pipe, standard classes, 3…20 inch
North American Pipe Schedules
Page 113 May 2016 TTM-UM-00136-EN-06
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