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the main equation to calculate the pump head and friction losses is
Darcy-Weisbach
Colebrook
Hazen-Williams
you may use a program for calculating the head like
H-SYM elite program
Train pipe sizer
Pipe flow expert
this program is easy to use and you can deal with it easily
if you search for excel sheet on the internet you will fined many
if you need an example try to contact me at en_sherif_m at yahoo
