Hereunder we're making available to our visitors some of the most common calculations and conversion tables used in the industries which we work with. We hope you find them of use.



Friction Factors and Calculation for Various Materials

Material C factor
New Steel 130-140
Old Steel 90-100
PVC & CPVC 140-150
Cast Iron, New, unlined 130
10 yrs old 107-113
20 yrs old 89-100
30 yrs old 75-90
40 yrs old 64-83
Concrete lined 120-140
Formula f = 0.2083 * (100/C)^1.852 * (Q^1.852/Di^4.8655)
f = ft/100 ft loss for water
C = Hazen-Willams C factor
Q = flowrate in GPM
Di = pipe ID in inches

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Conversion tables