请注意:此版本的所有临时修订版将在您购买时提供。消防服务指示杆UL 7891范围1。1这些要求包括指示杆，包括墙式和地下式，用于操作内部螺旋模式的阀门，以及指示此类阀门中闸门的位置。指示杆主要用于控制喷水器、雨淋器、喷水器、泡沫和竖管系统供水的阀门，用于连接进入建筑物的私人消防系统。 1.2本标准涵盖的指示柱的安装和使用要求包含在美国国家消防协会的以下标准中:a）NFPA 11、低膨胀泡沫和复合剂系统；b） NFPA 13，自动喷水灭火系统的安装；c） NFPA 14，竖管和软管系统的安装；NFPA 24，私人消防总管的安装。

Please note: All interim revisions for this edition available at time of your purchase will be included.Indicator Posts for Fire-Protection ServiceUL 7891 Scope1.1 These requirements cover indicator posts, including wall and underground types, for use in operating valves of the inside-screw pattern and for indicating the position of the gates in such valves. Indicator posts are primarily intended for use with valves controlling water supplies to sprinkler, deluge, water spray, foam, and standpipe systems used in private fire service where connections enter buildings.1.2 Requirements for the installation and use of the indicator posts covered by this standard are included in the following Standards of the National Fire Protection Association:a) NFPA 11, Low Expansion Foam and Combined Agent Systems;b) NFPA 13, Installation of Sprinkler Systems;c) NFPA 14, Installation of Standpipe and Hose Systems; andd) NFPA 24, Installation of Private Fire Service Mains.