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Maximum flow through a pipe

Maximum flow through a pipe

Maximum flow through a pipe

(OP)
Hi,
I apologize in advance for my cluelessness about fluid mechanics.  I have a spray testing assembly, where each nozzle requires a certain flow rate (20 gal/hr).  I am trying to figure out what the largest number of nozzles I can put on the assembly, therefore, what is the maximum flow rate that I can get in my pipe, assuming that the maximum water pressure is 60 psi coming into the 3/4" pipe.  Also, water pressure in the assembly has to maintain at least 10 psi.  I could not find an equation to solve for this.  Can anyone tell me if there is more information that I need and how to solve for this?
Thank you so much!  

RE: Maximum flow through a pipe

A picture is worth a thousand words.  Attaching a dimensioned sketch of the spray assembly would be a great start.  What schedule is the 3/4" pipe?  How long is the pipe to the first spray nozzle?  What is the separation between spray nozzles?  How much maldistribution is tolerable?  5% is typical.

Good luck,
Latexman

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