K-factor (fire protection)
In fire protection engineering, the K-factor formula is used to calculate the discharge rate from a nozzle. Spray Nozzles can be fire sprinklers or water mist nozzles, hose reel nozzles, water monitors and deluge fire system nozzles.
K-Factors calculated in Metric units;
K-Factors have also been calculated and published in US units of PSI and GPM. Within the United States, only US measurements (PSI, and US-Gallons per minute) are used.
Care should be exercised not to intermix K-factors from Metric and Imperial/US units as the resulting factors are not equivalent or interchangeable.
- "K-Factor formula". Canute LLP. 18 Jan 2009. Retrieved 2009-01-18.
- "How can I use sprinkler K factor information in Pipe Flow Expert?". PipeFlow. n.d. Retrieved 2019-06-06.
- k-factor calculator Calculate k-factor for a set of fittings, bends, valves etc. in a piping system.
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- Sources using US K-Factor for fire protection; Engineermate; http://engineermate.com/Hydraulics/FlowTest/KfactorConvert.htm Building codes; http://buildingcoderesourcelibrary.com/ Sprinkler manufacturer who lists both types of K-Factor; http://www.hdfire.com/products/spray_nozzels/medium_velocity_spray_nozzle.htm