Fanning and Moody friction factors
Equivalent length key pipe components
Singularity coefficient key pipe components
Partially filled pipe
Control valve sizing for gases
Pressure safety valves
Velocity in pipes
The friction factor is used to calculate the pressure drop due to the flow of a fluid in a pipe. It represents the interaction in between the fluid and the pipe. One must be extremely careful when consulting litterature for correlations as the nature of the friction factor used in not always very well apparent.
2. Relation in between Fanning and Moody coefficient
The following relation allows to go from Moody's friction factor to Fanning :
fMoody = 4*fFanning
fMoody = Moody's friction factor
fFanning = Fanning's friction factor
Note that Moody's friction factor is sometimes called Darcy or Darcy-Weisbach friction coefficient.