ImageVerifierCode 换一换
格式:PDF , 页数:22 ,大小:730.12KB ,
资源ID:530712      下载积分:5000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-530712.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM E2257-2017 Standard Test Method for Room Fire Test of Wall and Ceiling Materials and Assemblies《墙壁和天花板材料和组件的房间起火测试的试验方法》.pdf)为本站会员(rimleave225)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

ASTM E2257-2017 Standard Test Method for Room Fire Test of Wall and Ceiling Materials and Assemblies《墙壁和天花板材料和组件的房间起火测试的试验方法》.pdf

1、Designation: E2257 16E2257 17 An American National StandardStandard Test Method forRoom Fire Test of Wall and Ceiling Materials andAssemblies1This standard is issued under the fixed designation E2257; the number immediately following the designation indicates the year oforiginal adoption or, in the

2、case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope Scope*1.1 This is a fire-test-response standard.1.2 This test method is intended to evaluat

3、e, under specified fire-exposure conditions, the contribution to room fire growthprovided by wall or ceiling materials and assemblies, or both. The method is not intended to evaluate the fire endurance ofassemblies or fires originating in the wall assembly. The method provides a means to evaluate th

4、e effectiveness of thermal barriersin 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 th

5、e relative performance of specified wall and ceiling materials or assemblies when they are usedtogether 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 surfac

6、e product using a specifiedignition source. It shall, however, be noted that the type, position and heat output of the ignition source will considerably influencefire growth. The thermal exposure conditions from the ignition source specified in this method will result in flashover during the20 min d

7、uration for many common finish materials, in particular if specimens are mounted on the walls and the ceiling (standardconfiguration).1.5 This test method provides a means for evaluating wall and ceiling finish materials and assemblies, including panels, tiles,boards, sprayed or brushed coatings, et

8、c. This test method is not intended to evaluate flooring materials or furnishings.1.6 This method shall be used in conjunction with Guide E603, which covers instrumentation and the general effect of variousparameters, and Guide E2067, which deals with full-scale oxygen consumption calorimetry.1.7 Th

9、e values stated in SI units are to be regarded as the standard. The units given in parentheses are for information only.1.8 The text of this standard references notes and footnotes which provide explanatory information. These notes and footnotes(excluding those in figures) shall not be considered as

10、 requirements of the standard.1.9 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame undercontrolled conditions, but does not by itself incorporate all factors required for fire-hazard or fire-risk assessment of the materials,products,

11、or assemblies under actual fire conditions.1.10 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulato

12、rylimitations prior to use.1.11 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conductingthese tests.1.12 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the

13、 Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.1 This test method is under the jurisdiction ofASTM Committee E05 on Fire Standards and is the direct responsibility of

14、 Subcommittee E05.21 on Smoke and CombustionProducts.Current edition approved Feb. 1, 2016April 15, 2017. Published March 2016April 2017. Originally approved in 2003. Last previous edition approved in 20132016 asE2257-13a.-16. DOI: 10.1520/E2257-16.10.1520/E2257-17.This document is not an ASTM stand

15、ard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases

16、 only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12. Referenced Doc

17、uments2.1 ASTM Standards:2E84 Test Method for Surface Burning Characteristics of Building MaterialsE136 Test Method for Behavior of Materials in a Vertical Tube Furnace at 750CE176 Terminology of Fire StandardsE603 Guide for Room Fire ExperimentsE2067 Practice for Full-Scale Oxygen Consumption Calor

18、imetry Fire Tests2.2 ISO Standards:ISO 9705 Fire TestsReaction to FireRoom Fire Test3ISO 13943 Fire SafetyVocabulary32.3 NFPA Standards:NFPA 265 Standard Method of Tests for Evaluating Room Fire Growth Contribution of Textile Wall Coverings4NFPA 286 Standard Method of Tests for Evaluating Contributi

19、on of Wall and Ceiling Interior Finish to Room Fire Growth43. Terminology3.1 DefinitionsFor definitions of terms used in this standard, see Terminology E176 and ISO 13943. In case of conflict, thedefinitions given in Terminology E176 shall prevail.3.1.1 assembly, na unit or structure composed of a c

20、ombination of materials or products, or both. E1763.1.2 flashover, nthe rapid transitionto a state of total surface involvement in a fire of combustible materials within anenclosure. E1763.1.3 heat flux, nheat transfer to a surface per unit area, per unit time. E1763.1.4 heat release rate, nthe heat

21、 evolved from the specimen per unit time. E1763.1.5 optical density of smoke, na measure of the attenuation of a light beam through smoke, expressed as the commonlogarithm of the ratio of the incident flux, I0, to the transmitted flux, I. E1763.1.6 oxygen consumption principle, nthe expression of th

22、e relationship between the mass of oxygen consumed duringcombustion and the heat released. E1763.1.7 smoke, nthe airborne solid and liquid particulates and gases evolved when a material undergoes pyrolysis or combustion.E1763.1.8 smoke obscuration, nreduction of light transmission by smoke as measur

23、ed by light attenuation. E1763.2 Definitions of Terms Specific to This Standard:3.2.1 specimen, nrepresentative piece of the product, which is to be tested together with any substrate or treatment.4. Summary of Test Method4.1 This method uses a gas burner to produce a diffusion flame in contact with

24、 the walls and ceiling in the corner of a 2420by 3630 by 2420 mm (8 by 12 by 8 ft) high room. The burner produces a prescribed net rate of heat output of 100 kW (5690Btu/min) during the first 10 min, followed by 300 kW (17 060 Btu/min) during the next 10 min. The contribution of the wall andceiling

25、materials or assemblies to fire growth is measured in terms of the time history of the incident heat flux on the center ofthe floor, the time history of the temperature of the gases in the upper part of the room, the time to flashover, and the rate of heatrelease. The test is conducted with natural

26、ventilation to the room provided through a single doorway 780 by 2015 mm (30 by 80in.) in width and height. The combustion products are collected in a hood feeding into a plenum connected to an exhaust duct inwhich measurements are made of the gas velocity, temperature, light obscuration, and concen

27、trations of oxygen, carbon dioxide,and carbon monoxide.5. Significance and Use5.1 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

28、 indicates the maximum extent of fire growthin a room, the rate of heat release, and if they occur, the time to flashover, and the time to flame extension beyond the doorwayfollowing flashover. It determines the extent to which the wall and ceiling materials or assemblies contribute to fire growth i

29、n aroom and the potential for fire spread beyond the room, under the particular conditions simulated. It does not measure thecontribution of the room contents. (See Appendix X1, Commentary.)5.2 Flashover shall be considered to have occurred when any two of the following conditions have been attained

30、:2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from International Organization for Standardizat

31、ion (ISO), 1 rue de Varemb, Case postale 56, CH-1211, Geneva 20, Switzerland.4 Available from National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02269-9101.E2257 172(a) Heat release rate exceeds 1 MW.(b) Heat flux at the floor exceeds 20 kW/m2.(c) Average upper layer temper

32、ature exceeds 600C.(d) Flames exit doorway.(e) A paper target on the floor auto-ignites.5.2.1 Time to flashover shall be the time from start of test until the second condition has been attained.5.3 The potential for the spread of fire to other objects in the room, remote from the ignition source, is

33、 evaluated bymeasurements of: (a) the total heat flux incident on the center of the floor, and (b) a characteristic upper level gas temperature inthe room.5.4 The potential for the spread of fire to objects outside the room of origin is evaluated by the measurement of the rate of heatrelease of the

34、fire.5.5 Measurements of the rate of production of carbon monoxide, carbon dioxide, and visible smoke are taken.5.6 The overall performance of the test specimen is visually documented by full-color photographic records. Video taping ofthe complete fire test is an acceptable alternative to the photog

35、raphic record. Such records show when each area of the testspecimen becomes involved in the fire.5.7 In this procedure, the specimens are subjected to a specific set of laboratory fire test exposure conditions. If different testconditions are substituted or the anticipated end-use conditions are cha

36、nged, it is not known whether it is possible by use of thistest to predict changes in the performance characteristics measured. Therefore, the results are strictly valid only for the fire testexposure conditions described in this procedure.6. Ignition Source6.1 The ignition source for the test shall

37、 be a gas burner with a nominal 170 by 170 mm (6.7 by 6.7 in.) porous top surface ofa refractory material, as shown in Fig. 1.6.2 The top surface of the burner through which the gas is supplied shall be located horizontally, 170 mm (6.7 in.) off the floor,and the burner enclosure shall be in contact

38、 with both walls in a corner of the room opposite from the door, and the edge of thediffusion surface shall be flush with the wall.6.3 The burner shall be supplied with C.P. grade propane (99 % purity), with a net heat of combustion of 46.5 6 0.5 MJ/kg(20 000 6 200 Btu/lb.) The gas flow to the burne

39、r shall be measured with an accuracy of at least 63 %. The flow measuringequipment shall be calibrated per the manufacturers instructions at least once per year. The heat output to the burner shall becontrolled within 65 % of the prescribed value.6.4 The gas supply to the burner shall produce a net

40、heat output of 100 6 3 kW (5690 6 170 Btu/min) for the first 10 min,followed by 300 6 10 kW (17060 6 570 Btu/min) for the next 10 min.NOTE 1This corresponds to a flow of approximately 67.3 L/min at 100 kW, and 202.0 L/min at 300 kW for propane with a net heat of combustionof 46.5 MJ/kg, under standa

41、rd conditions of 101 kPa pressure and 20C temperature.6.5 The burner shall be ignited by a pilot burner or a remotely controlled spark igniter.6.6 Burner controls shall be provided for automatic gas supply shut-off if flameout occurs.7. Compartment Geometry and ConstructionNOTE 2The choices for the

42、size of compartment fire experiments are discussed in Guide E603. The compartment dimensions and tolerances definedin this section have been chosen to make it convenient to utilize both standard U.S. size 1.22 by 2.44 m (4 by 8 ft) building materials or panels and standard1.2 by 2.4 m panel sizes co

43、mmon outside the U.S.7.1 The room shall consist of four walls at right angles, floor, and ceiling and shall have the following inner dimensions: 36306 30 mm (12 ft) in length, 2420 6 20 mm (8 ft) in width, and 2420 6 20 mm (8 ft) in height (see Fig. 2). The room shall beplaced indoors in an essentia

44、lly draft free, conditioned space, large enough to ensure that there is no influence on the test fire. Inorder to facilitate the mounting of the instruments and of the ignition source, it is convenient to place the test room so that the flooris accessible from beneath.7.2 There shall be a doorway in

45、 the center of one of the 2420 by 2420 mm (8 by 8 ft) walls, and no other wall, floor or ceilingopenings that allow ventilation. The doorway shall have the following dimensions: 780 6 20 mm (30 in.) in width, and 2015 615 mm (80 in.) in height.7.3 The test compartment shall be a framed or a concrete

46、-block structure. If the former type of structure is used, the interiorwalls and ceiling of the frame shall be lined with gypsum wallboard or calcium silicate board with a density of 500 to 800 kg/m3(31 to 50 lb/ft3). The minimum thickness of the lining material shall be 20 mm (34 in.).7.4 If self-s

47、upporting panels are tested, a separate exterior frame or block compartment is not required.E2257 1738. Instrumentation in the Fire Room8.1 The following are minimum requirements for instrumentation for this test. Added instrumentation is desirable for furtherinformation.8.2 Heat Flux:8.2.1 Specific

48、ationThe total heat flux meters shall be of the Gardon (foil) or the Schmidt-Boelter (thermopile) type with adesign range of approximately 50 kW/m2 (4.4 Btu/ft2s). The target receiving radiation, and possibly to a small extent convection,shall be flat, circular, not more than 15 mm (58 in.) in diame

49、ter and coated with a durable matt black finish. The target shall beFIG. 1 Gas Burner Ignition SourceE2257 174contained within a water-cooled body whose front face shall be of highly polished metal, flat, coinciding with the plane of the targetand circular, with a diameter of not more than 50 mm (2 in.) The heat flux meter shall have an accuracy of at least 6 3 % anda repeatability within 6 0.5 %. In operation, the meter shall be maintained at a constant temperature, at least 5C above the dewpoint.8.2.2 LocationThe heat flux meter shall be mounted at the

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1