Scope
1.1 These requirements cover automatic and non-automatic (open) type water spray nozzles for
installation in accordance with the Standard for Installation of Sprinkler Systems, NFPA 13, and the
Standard for Water Spray Fixed Systems for Fire Protection, NFPA 15.
1.2 Nozzles are categorized by the discharge coefficient "K" of the orifice, water discharge angle or
pattern, type of coating or plating, and other factors that have a bearing on their application. Automatic
nozzles are also categorized by operating temperature rating.