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ASTM E2257-2008 墙壁和天花板材料及组件的房屋着火试验的标准试验方法

ASTM E2257-2008 墙壁和天花板材料及组件的房屋着火试验的标准试验方法

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【英文标准名称】: Standard Test Method for Room Fire Test of Wall and Ceiling Materials and Assemblies
【原文标准名称】: 墙壁和天花板材料及组件的房屋着火试验的标准试验方法
【标准号】: ASTM E2257-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: E05.21
【标准类型】: (Test Method)
【标准水平】: ()
【中文主题词】:
【英文主题词】: carbon dioxide; carbon monoxide; corner; fire; fire-test response; flame; heat release; heat release rate; ignition; optical density; oxygen consumption calorimetry; room; smoke obscuration; toxic gases; Ceiling suspension systems; Fire testi
【摘要】: This fire test is applicable to a description of certain fire performance characteristics in appraising wall and ceiling materials, products, or systems under specified fire-exposure conditions in an enclosure. The test indicates the maximum extent of fire growth in a room, the rate of heat release, and if they occur, the time to flashover, and the time to flame extension beyond the doorway following flashover. It determines the extent to which the wall and ceiling materials or assemblies contribute to fire growth in a room and the potential for fire spread beyond the room, under the particular conditions simulated. It does not measure the contribution of the room contents. (See Appendix X1, Commentary.) Note 18212;Time to flashover is defined herein as either the time when the radiant flux onto the floor exceeds 20 kW/m2 or the average temperature of the upper hot gas layer reaches 600x00B0;C (1100x00B0;F) or flames exit the doorway or spontaneous ignition of a paper target on the floor occurs. The spontaneous ignition of a crumpled single sheet of newspaper placed on the floor 0.9 m (3 ft) out from the center of the rear wall provides a visual indication of flashover. The potential for the spread of fire to other objects in the room, remote from the ignition source, is evaluated by measurements of: (a) the total heat flux incident on the center of the floor, and (b) a characteristic upper level gas temperature in the room. The potential for the spread of fire to objects outside the room of origin is evaluated by the measurement of the rate of heat release of the fire. Measurements of the rate of production of carbon monoxide, carbon dioxide, and visible smoke are taken. The overall performance of the test specimen is visually documented by full-color photographic records. Video taping of the complete fire test is an acceptable alternative to the photographic record. Such records show when each area of the test specimen becomes involved in the fire. In this procedure, the specimens are subjected to a specific set of laboratory fire test exposure conditions. If different test conditions are substituted or the anticipated end-use conditions are changed, it is not known whether it is possible by use of this test to predict changes in the performance characteristics measured. Therefore, the results are strictly valid only for the fire test exposure conditions described in this procedure.1.1 This is a fire-test-response standard. 1.2 This test method is intended to evaluate, under specified fire-exposure conditions, the contribution to room fire growth provided by wall or ceiling materials and assemblies, or both. The method is not intended to evaluate the fire endurance of assemblies or fires originating in the wall assembly. The method provides a means to evaluate the effectiveness of thermal barriers in restricting the contribution of combustible materials in the wall assembly to fire growth in a room fire. 1.3 This test method, simulating a fire in the corner of a 2420 by 3630 mm (8 by 12 ft) room containing a single open doorway, provides a means to evaluate the relative performance of specified wall and ceiling materials or assemblies when they are used together in the same relationship within an enclosure, and simulating the manner in which they will be used. 1.4 This test method is intended to evaluate the contribution to fire growth provided by a surface product using a specified ignition source. It shall, however, be noted that the type, position and heat output of the ignition source will considerably influence fire growth. The thermal exposure conditions from the ignition source specified in this method will res......
【中国标准分类号】: P16
【国际标准分类号】: 13_220_50
【页数】: 19P.;A4
【正文语种】: 英语

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