Skip to main content

.TT pocketEngineer softDesign

... pocketEngineer software for mobile design

pocketEngineer software  animated gif (free)  email me  buy now  Rethink, Reinvent apps   
...Ductulator Plus+
...aDuctulator (And)
...aBattMV (And)
...aKitchenExhaust (And)
...tRod Sizer (free)
...pocketPipe Sizer
...aPipeSizer (And)
...multi Pipes PD (And)
...aPocketGas (And)
...rhoAIR (free)
...aRhoAIR (free) (And)
...aPsychroAC (And)
...AirTAB superEZ
...Qcool Check
...aCriticalVel (And)
...aPocketPool (And)
ePF Loop Pdrop
...hydrant pressure drop
...Pumping Mainline
the working home of .TT pocketEngineer softDesign - where pocketEngineer software lives...
 Hydrant Ring Main System Pressure Drop  
-  working example with ePF Loop program (Windows)

total pressure drop calculation in series (branch) pipe + loop ring main pipe network



To take a glance at all pocketEngineer software and OS requirements, click Overview.


  >> go ePF Loop main page



ePF Loop programmulti-purpose easy Pipe Friction with Loop Ring Main

Application example: Hydrant ring main system

System design: maximum 2 hydrants to operate at any one time

Hydrant flow rate: 38 l/s each

Minimum operating pressure at most remote hydrant: 2 bars

Hydrant pipe material: Ductile iron

Hydrant pipe diameter: nominal 200mm (main supply), 150mm (loop), 150mm (branch), 100mm (hydrant pillar)


Applied Working: Refer to the hydrant system schematic sketch below, calculate the total pressure drop (head loss) in the system when 2 hydrants are open (hydrant FH 3/5 & 4/5). 


Note: in the following schematic diagram, numbering 1, 2, 3, 4, 5, 6, 7 are pipes in series, while numbering 101, 102, 103, 104, 105, 106, 107, 108, 109, 110 are pipes in loop ring main.


In ePF Loop program, pressure drop in series pipe and looped pipe are calculated separately. The total pressure drop for the system is adding all components causing resistance to flow. You're in control the whole calculation experience.






input and result screen snapshots  . . .


total pressure drop (head loss) calculation main page



series pipe pressure drop calculation page



looped pipe pressure drop calculation page



Results Deliverable:


In ePF Loop program, the results are saved in text file. You can then reformat, cut & paste, and so on to suit your desired format.











>> see results comparison example (ePF Loop vs a 3rd party program)




>> go Pumping Main Example with ePF Loop



>> Analysis example: Loop pipe ring main, see at  






For product enquiry, email me.




in SI Units 



 For input simplicity, units conversion

tools are