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Fire Nozzle - Required Discharge

Nozzle discharge Q from orifice area, pressure and coefficient of discharge - sizing for portable fire hose and monitor nozzles.

FireNozzleHydraulic
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Formula, assumptions, and limits

Q=CdA2gHQ = C_d \cdot A \cdot \sqrt{2 g H}
SymbolMeaningUnit
AAOrifice area
HHPressure head (10 m = 1 bar)m
CdC_dDischarge coefficient

Source: NFPA 1964 / SOLAS II-2

In short

Nozzle discharge Q from orifice area, pressure and coefficient of discharge - sizing for portable fire hose and monitor nozzles.

Learn the theory FSS Code: International Code for Fire Safety Systems