请注意:此版本的所有临时修订版将在您购买时提供。贯穿件FirestopsUL 1479Scope1的火灾试验。1这些要求包括用于防火墙、地板或地板天花板组件开口的各种材料和结构的贯穿式防火带，以及用于防火墙组件开口的各种材料和结构的膜式贯穿式防火带。1.2这些要求中规定的渗透防火材料的试验方法包括将试样暴露于标准时间和温度的火灾中，以及使用软管流。 然后根据以下因素确定等级:a）首次形成贯穿开口或在未暴露表面上燃烧之前，阻火器抵抗火灾的时间长度；b） 热传导的可接受限制；andc）软管流应用下的可接受性能。1.3试验方法还包括可选的空气泄漏试验，以确定贯穿件阻火系统的空气泄漏率，该系统由施加在系统表面的规定空气压差引起。1.4试验方法还包括可选的漏水试验，以确定渗透防火系统在三英尺压头下抵抗水通过的能力。 该方法不评估未固化防火系统抵抗此类暴露的能力。1.5每个贯穿件阻火系统有两个等级:基于试样未暴露侧的火焰出现和可接受的软管流性能的F级；以及基于试样未暴露侧的温升和火焰发生以及可接受的软管流性能的T级。1.6还可以为贯穿件防火系统建立L级。L等级基于通过试样的空气泄漏量。1.7也可为贯穿件防火系统确定W等级。 W等级基于试样的耐水性。1.8包含通风（排水、废物或通风）系统和封闭（工艺或供应）系统的管道系统的贯穿件阻火系统的测试方法不同于5.1.1.2.1.9根据这些要求进行的测试旨在证明暴露在火中时贯穿件阻火器的性能，但其目的不是确定暴露在火中后使用阻火器的可接受性。 这些要求不包括包裹在贯穿件防火材料中的导体的载流量。1.10空气泄漏试验的结果以每平方英尺（m2）开口的ft3/min（m3/s）表示。这些结果旨在开发数据，以帮助有管辖权的当局和其他人确定贯穿式防火带的可接受性，并参考通过组件的空气流动控制。不得将这些地板和插座组件用作耐火性要求的一部分。

Please note: All interim revisions for this edition available at time of your purchase will be included.Fire Tests of Penetration FirestopsUL 1479Scope1.1 These requirements cover through penetration firestops of various materials and construction that are intended for use in openings in fire resistive wall, floor or floor-ceiling assemblies, and membrane type penetration firestops of various materials and construction that are intended for use in openings in fire resistive wall assemblies.1.2 The method of testing penetration firestops as specified by these requirements consists of exposure of test samples to a fire of standard time and temperature and to an application of a hose stream. Ratings are then established on the basis of:a) The length of time the firestop resists fire before the first development of through openings or flaming on the unexposed surface;b) Acceptable limitation of thermal transmission; andc) Acceptable performance under the application of the hose stream.1.3 The method of testing also includes optional air leakage tests to determine the rate of air leakage through penetration firestop systems resulting from a specified air pressure difference applied across the surface of the systems.1.4 The method of testing also includes optional water leakage tests to determine the ability of penetration firestop systems to resist the passage of water under a three foot pressure head. This method does not evaluate the ability of uncured firestop systems to resist such exposure.1.5 Two ratings are established for each penetration firestop system: an F rating based upon flame occurrence on the unexposed side of the test sample and acceptable hose stream performance; and a T rating based on temperature rise and flame occurrence on the unexposed side of the test sample and acceptable hose stream performance.1.6 An L rating may also be established for a penetration firestop system. The L rating is based on the amount of air leakage through the test sample.1.7 A W rating may also be established for a penetration firestop system. The W rating is based on the water resistance of the test sample.1.8 The method of testing penetration firestop systems containing piping systems for vented (drain, waste or vent) systems and closed (process or supply) systems is differentiated by the capping or non-capping of the piping systems on the unexposed side of the test assembly as described in 5.1.1.2.1.9 Tests conducted in accordance with these requirements are intended to demonstrate the performance of penetration firestops during exposure to fire, but are not intended to determine acceptability of firestops for use after exposure to fire. These requirements do not cover the ampacity of conductors encased in penetration firestop materials.1.10 The results obtained from the air leakage tests are expressed in ft3/min (m3/s) per ft2 (m2) of opening. The results are intended to develop data to assist authorities having jurisdiction, and others, in determining the acceptability of penetration firestops with reference to the control of air movement through the assembly.1.11 These requirements do not cover outlet boxes and fittings for use in and evaluated for fire resistance as part of a fire-resistance-rated floor, floor-ceiling or wall assembly.