请注意:此版本的所有临时修订版将在您购买时提供。消防用喷嘴UL 23511范围1。1这些要求包括根据NFPA 13《自动喷水灭火系统安装标准》和NFPA 15.1.2《固定式消防喷水灭火系统标准》安装的自动和非自动（开放）型喷水喷嘴。喷嘴根据孔口的流量系数“K”、排水角度或模式、涂层或镀层类型进行分类，以及其他影响其应用的因素。自动喷嘴也按工作温度等级分类。

Please note: All interim revisions for this edition available at time of your purchase will be included.Spray Nozzles for Fire-Protection ServiceUL 23511 Scope1.1 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.