UL 2167, 2nd Edition, March 9, 2021 - UL Standard for Safety Water Mist Nozzles for Fire Protection Service

This Standard contains requirements for water mist nozzles for use with water mist fire-protection systems intended for the protection of residential, light and ordinary hazard areas as well as shipboard machinery, control spaces, service areas, and public spaces. The intended application and use of a water mist nozzle is referenced in the Manufacturer's Design and Installation Instructions. See Section 49, Design and Installation Instructions. 

This Standard is intended to address minimum fire-protection performance, construction, and marking requirements for water mist nozzles.