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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

>> Application example (2-Loop ):  Two-loop pipe network flow and pressure drop analysis

>> worked example (2-Loop): Two-loop Hydrant ring main pipe pressure drop analysis

>> worked example (Series): Wet Riser system

>> worked example (Series): Water pumping main system

>> Analysis example: see Loop pipe ring main.

>> Steam pipe pressure drop example: see Pressure loss in steam pipe.