Hydraulic calculation introduction
When conducting hydraulic calculations of automatic sprinkler systems it’s a valid assumption that the fluid is clear water with a weight density of 62.4 lbs/ft³ in all but a few situations . Applications where antifreeze solution and foam water solution are required, change the weight density of the fluid medium being calculated and in some cases may require a conversion of the standard flow formula Q = K√P to calculate accurate sprinkler flow. Various NFPA standards address these situations in different ways and provide the system designer with guidance as to whether or not a flow conversion should be considered.
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