请注意:此版本的所有临时修订版将在您购买时提供。消防用金属喷淋管UL 8521范围1。1这些要求包括用于配水或阀内件应用的水基消防系统的金属管。当按照以下标准安装时，这些管道可用于消防系统:a）自动喷水灭火系统安装标准，NFPA 13；b） NFPA 13R《四层以下住宅区自动喷水灭火系统安装标准》；c） NFPA 13D《单户住宅和双户住宅及人工住宅自动喷水灭火系统安装标准》； d） 立管、私人消防栓和软管系统安装标准，NFPA 14；e） 水喷雾固定系统标准，NFPA 15；f） 泡沫喷水系统安装标准，NFPA 16；和g）关于细水雾消防系统的标准，NFPA 750.1.2管道按尺寸、压力等级、端部配置（螺纹或无螺纹）和壁厚名称进行分类。钢管也按耐腐蚀率（CRR）分类。

Please note: All interim revisions for this edition available at time of your purchase will be included.Metallic Sprinkler Pipe for Fire Protection ServiceUL 8521 Scope1.1 These requirements cover metallic pipe intended for use in water based fire protection systems for water distribution or valve trim applications. These pipes may be used in fire protection systems when installed in accordance with the following Standards:a) Standard for Installation of Sprinkler Systems, NFPA 13;b) Standard for Installation of Sprinkler Systems in Residential Occupancies up to Four Stories in Height, NFPA 13R;c) Standard for Installation of Sprinkler Systems in One- and Two- Family Dwellings and Manufactured Homes, NFPA 13D;d) Standard for Installation of Standpipe, Private Hydrants, and Hose Systems, NFPA 14;e) Standard for Water Spray Fixed Systems, NFPA 15;f) Standard for Installation of Foam-Water Spray Systems, NFPA 16; andg) Standard on Water Mist Fire Protection Systems, NFPA 750.1.2 Pipe is categorized by size, pressure rating, end configuration, (threaded or unthreaded) and wall thickness designation. Steel pipe is also categorized by the Corrosion Resistance Ratio (CRR).