专业防汛/防火/防爆治理
Professional flood/fire/explosion control

消防栓流量检测服务

发布日期:2022-01-12 14:55:16   浏览量 :39
unknown unknown 发布日期:2022-01-12 14:55:16  
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定期的消火栓测试可确保能够以可接受的压力和流速为公共卫生和消防行动提供水。大多数司法管辖区还要求进行消火栓流量测试,以设计用于商业或住宅结构的消防喷淋系统。 NFPA 291 的 2019 年版:消防栓的消防流量测试和标记推荐做法 (4.1.3) 建议消防栓应保持 20 psi(磅每平方英寸)或 1.4 bar 的残余压力,以便有效灭火,因为以及防止可能污染公共供水的回流。 NFPA 291 规定每五年进行一次消防栓流量测试,以确保管道和系统需求中不断变化的条件不会妨碍消防栓的供水能力。 来自 2019 年版 NFPA 291 4.13.1 公共消火栓应每 5 年进行一次流量测试,以验证消火栓的容量和标记。 在伴随该部分 (A.4.13.1) 的解释中,NFPA 阐明了该部分的意图。它指出,这并不意味着强制要求对每个消防栓进行为期五年的例行测试——特别是如果没有迫切需要测试特定的消防栓,或者如果可以从同一网格上的相邻消防栓获得不到五年的测试数据。 在发生火灾紧急情况时,不是发现消防栓没有按预期工作的合适时机。 消防栓测试由城市官员或专业承包商执行,可验证城市供水系统的性能,确定各个位置的可用压力和流量。它测量静态(非流动)和残余(流动)压力,以及每个消防栓的每分钟加仑数 (GPM) 的排放率。

Regular fire hydrant testing ensures the ability to provide water at an acceptable pressure and flow rate for public health and firefighting operations. Most jurisdictions also require hydrant flow tests to design fire sprinkler systems for commercial or residential structures.

The 2019 edition of NFPA 291: Recommended Practice for Fire Flow Testing and Marking of Hydrants (4.1.3) recommends that fire hydrants should maintain a residual pressure of 20 psi (pounds per square inch), or 1.4 bar, for effective firefighting, as well as to prevent backflow that could contaminate the public water supply.

NFPA 291 stipulates hydrant flow tests every five years to ensure that changing conditions in the piping and system demands won’t impede hydrants’ ability to deliver water.

From the 2019 edition of NFPA 291

4.13.1 Public fire hydrants should be flow tested every 5 years to verify capacity and marking of the hydrant.

In the explanation that accompanies the section (A.4.13.1), NFPA clarifies the section’s intent. It states that it does not mean to mandate routine five-year testing of every hydrant—especially if there is no pressing need to test a specific hydrant or if test data less than five years old is available from an adjacent hydrant on the same grid.

The middle of a fire emergency isn’t the right time to discover fire hydrants don’t work as expected.

Performed by city officials or professional contractors, fire hydrant testing verifies the performance of a city’s water distribution system, determining the pressure and rate of flow available at various locations. It measures static (non-flowing) and residual (flowing) pressure, as well as the rate of discharge in gallons per minute (GPM) of each fire hydrant.

测试
流量
压力
消防栓
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