Thermo DCT7088 - Page 58

53
Table A-3
Ductile Iron Pipe Standard Classes
Inside Diameter (ID) and Outside Diameter (OD) in Inches
Inside Diameter
Cement Lin ing
( see note)
Nominal
Pipe Size
OD
Class
50
Class
51
Class
52
Class
53
Class
54
Class
55
Class
56
Standard
Thickness
Double
Thickness
3 4 6 8 10 12
3.96 4.80 6.90 9.05 11.10 13.20
6.40 8.51 10.52 12.58
3.46 4.28 6.34 8.45 10.46 12.52
3.40 4.22 3.28 6.39 10.40 12.46
3.34 4.16 6.22 8.33 10.34 12.40
3.28 4.10 6.16 8.27 10.28 12.34
3.22 4.04 6.10 8.21 10.22 12.28
3.16 3.98 6.04 8.15 10.16 12.22
0.125
0.250
14 16 18 20 24
15.30 17.40 19.50 21.60 25.80
14.64 16.72 18.80 20.88 25.04
14.58 16.66 18.74 20.82 24.98
14.52 16.60 18.68 20.76 24.92
14.46 16.54 18.62 20.70 24.86
14.40 16.48 18.56 20.64 24.80
14.34 16.42 18.50 20.58 24.74
14.28 16.36 18.44 20.52 24.68
0.1875
0.375
30 36 42 48 54
32.00 38.30 44.50 50.80 57.10
31.22 37.44 43.56 49.78 55.96
31.14 37.34 43.44 49.64 55.80
31.06 37.06 43.32 49.50 55.48
30.98 37.14 43.20 49.36 55.48
30.90 37.04 43.08 49.22 55.32
30.82 36.94 42.96 49.08 55.16
30.74 36.84 42.84 48.94 55.00
0.250
0.500
NOTE: For pipes with cement linings, reduce the pipe ID by two times the lining thickness listed abov e.