52
Table A-2
Cast Iron Pipe Standard Classes
Inside Diameter (ID) and Outside Diameter (OD) in Inches
Nominal Pipe
Size
Class A Class B Class C Class D Class E Class F Class G Class H
ID OD ID OD ID OD ID OD ID OD ID OD ID OD ID OD
3
4
6
8
10
3.80
4.80
6.90
9.05
11.10
3.02
3.96
6.02
8.13
10.10
3.96
5.00
7.10
9.05
11.10
3.12
4.10
6.14
8.03
9.96
3.96
5.00
7.10
9.30
11.40
3.06
4.04
6.08
8.18
10.16
3.96
5.00
7.10
9.30
11.40
3.00
3.96
6.00
8.10
10.04
7.22
9.42
11.60
6.06
8.10
10.12
7.22
9.42
11.60
6.00
8.10
10.00
7.38
9.60
11.84
6.08
8.10
10.12
7.38
9.60
11.84
6.00
8.00
10.00
12
14
16
18
20
13.20
15.30
17.40
19.50
21.60
12.12
14.16
16.20
18.22
20.26
13.20
15.30
17.40
19.50
21.60
11.96
13.98
16.00
18.00
20.00
13.50
15.65
17.80
19.92
22.06
12.14
14.17
16.20
18.18
20.22
13.50
15.65
17.80
19.92
22.06
12.00
14.01
16.02
18.00
20.00
13.78
15.98
18.16
20.34
22.54
12.14
14.18
16.20
18.20
20.24
13.78
15.98
18.16
20.34
22.54
12.00
14.00
16.00
18.00
20.00
14.08
16.32
18.54
20.78
23.02
12.14
14.18
16.18
18.22
20.24
14.08
16.32
18.54
20.78
23.02
12.00
14.00
16.00
18.00
20.00
24
30
36
42
48
25.80
31.74
37.96
44.20
50.50
24.28
28.98
35.98
42.00
47.98
25.80
32.00
38.30
44.50
50.80
24.02
29.94
36.00
41.94
47.96
26.32
32.40
38.70
45.10
51.40
24.22
30.00
35.98
42.02
47.98
26.32
32.74
39.16
45.58
51.98
24.00
30.00
36.00
42.02
48.00
26.90
33.10
39.60
24.28
30.00
36.00
26.90
33.46
40.04
24.00
30.00
36.00
27.76
24.26
27.76
24.00
54
60
72
84
56.66
62.80
75.34
87.54
53.96
60.02
72.10
84.10
57.10
63.40
76.00
88.54
54.00
60.06
72.10
84.10
57.80
64.20
72.10
84.10
57.80
64.20
76.88
54.00
60.20
72.10
58.40
64.82
53.94
60.06
NOTE: For pipes with cement linings, reduce the pipe ID by two times the lining thickness. Standard and double cement lining thickne sses listed
in Table A-3.
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