5707070-A Specifications and Reference Information 4-11
Sono-Trak™ Doppler Ultrasonic Flow Meter
Table 4-6. Ductile iron pipe standard classes (inside diameters)
Size
Inches
Outside
Diameter
Class
50
Class
51
Class
52
Class
53
Class
54
Class
55
Class
56
Cement Lining
Note 1
Standard
Thickness
Double
Thickness
3 3.96 3.46 3.40 3.34 3.28 3.22 3.16
4 4.80 4.28 4.22 4.16 4.10 4.04 3.98
6 6.90 6.40 6.34 6.28 6.22 6.16 6.10 6.04 0.125 0.250
8 9.05 8.51 8.45 8.39 8.33 8.27 8.21 8.15
10 11.10 10.52 10.46 10.40 10.34 10.28 10.22 10.16
12 13.20 12.58 12.52 12.46 12.40 12.34 12.28 12.22
14 15.30 14.64 14.58 14.52 14.46 14.40 14.34 14.28
16 17.40 16.72 16.66 16.60 16.54 16.48 16.42 16.36
18 19.50 18.80 18.74 18.68 18.62 18.56 18.50 18.44 0.1875 0.375
20 21.60 20.88 20.82 20.76 20.70 20.64 20.58 20.52
24 25.80 25.04 24.98 24.92 24.86 24.80 24.74 24.68
30 32.00 31.22 31.14 31.06 30.98 30.90 30.82 30.74
36 38.30 37.44 37.34 37.06 37.14 37.04 36.94 36.84
42 44.50 43.56 43.44 43.32 43.20 43.08 42.96 42.84 0.250 0.500
48 50.80 49.78 49.64 49.50 49.36 49.22 49.08 48.94
54 57.10 55.96 55.80 55.64 55.48 55.32 55.16 55.00
Note 1
Reduce I.D. by dimension shown; these figures also apply to C.I. pipe
