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UL’s suppression team can investigate and certify water mist nozzles in accordance with UL 2167, the Standard for Safety of Water Mist Nozzles for Fire-Protection Service, as well as in accordance with IMO Regulations. The requirements for the installation and use of these products are specified in the National Fire Protection Association (NFPA) installation standard on water mist: NFPA 750.
Water mist nozzles are subjected to performance tests such as water flow and distribution testing as well as vacuum resistance, clogging and freezing tests. We also assist in the development of custom tests for water mist firefighting solutions, including durability, performance, operation, and particle imaging velocimetry (PIV) measurements for sprinkler spray drop size and velocity.