Friction calculations for liquids

Imperial units Metric units

Flow (gpm):    
Diameter (in):    
Viscosity ν(cSt):        typical values
Specific gravity SG:            
Roughness ε(in):     typical values
cast iron = 0.06 in
galvanized iron = 0.006 in
commercial steel = 0.0018 in
Length (ft):    
Relative roughness ε/d: 0.0009   
Velocity v (ft/s): 5.11   
Re: Reynolds no.: 79100     the flow is turbulent (> 4000)
f: Friction parameter: 0.02254   values for f on the Moody diagram
h/L: Friction factor (ft/100 ft pipe): 5.5
h: Friction (ft): 0
Friction power usage (hp): 0

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