John:

To keep your project simple do a search on the internet for "friction loss."  You should get a lot of hits.  This is one of many that I just got:

http://www.pump.net/frictiondata/fricofviscous.htm

This link give friction losses based on viscosity.

Hope this helps.

dideyjohn,

please provide some further details
of your proposed pumping system as follows:

-Pump flowrate = ??? gpm
-Is the fluid level on the suction side of
the pump below or above the pump suction
centreline ???
Also state how far below or above the pump
suction centreline the fluid is.
-Is the fluid discharged to atmosphere at
the other end of your pipe into a tank ???
-Provide the viscosity of the fluid in centistokes
or mm2/s if possible ?
-Provide fluid density if possible ?

Come back with above data & details & we should
be able to come up with a solution...
regards
pumpmanplee