ASTM F2894-2014 Standard Test Method for Evaluation of Materials Protective Clothing and Equipment for Heat Resistance Using a Hot Air Circulating Oven《采用热风循环烤炉评估耐热用材料 防护服和设备的标准试验方.pdf
《ASTM F2894-2014 Standard Test Method for Evaluation of Materials Protective Clothing and Equipment for Heat Resistance Using a Hot Air Circulating Oven《采用热风循环烤炉评估耐热用材料 防护服和设备的标准试验方.pdf》由会员分享,可在线阅读,更多相关《ASTM F2894-2014 Standard Test Method for Evaluation of Materials Protective Clothing and Equipment for Heat Resistance Using a Hot Air Circulating Oven《采用热风循环烤炉评估耐热用材料 防护服和设备的标准试验方.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F2894 14Standard Test Method forEvaluation of Materials, Protective Clothing and Equipmentfor Heat Resistance Using a Hot Air Circulating Oven1This standard is issued under the fixed designation F2894; the number immediately following the designation indicates the year oforiginal adopti
2、on or, in the 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. Scope1.1 This test method covers quantitative measurements andsubjective observatio
3、ns that characterize the performance forevaluating the heat resistance of materials, protective clothingand equipment when exposed in a hot air circulating oven.1.2 This test method is intended to evaluate physicalchanges in materials, protective clothing and equipment at aspecified heat exposure.1.
4、2.1 The specified heat exposure in the hot air circulatingoven is a combination of convective heat and radiant heat.1.3 Materials, protective clothing and equipment are evalu-ated for visible changes or subjected to a material propertymeasurement following a specified heat exposure.1.3.1 This test m
5、ethod is not to be used for the evaluation ofsticking. An acceptable method for evaluating sticking offabrics is described in NFPA 1975, Sections 7.2.1 and 8.3. TheNFPA 1975 test method evaluates the thermal stability ofspecimens by assessing the blocking of folded specimensplaced between glass plat
6、es, under a specified weight, inside anoven meeting the same characteristics of the oven used in thistest method.1.4 This test method enables the quantitative measurementof dimensional change that occurs as a result of a specified heatexposure in a hot air circulating oven.1.5 The values stated in S
7、I units are to be regarded asstandard. The values given in parentheses are mathematicalconversions to other units that are commonly used for thermaltesting.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of
8、 this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 1Flame resistant and heat resistant materials are described in arange of different standards and meet a range of different requirements.For materials test
9、ed in accordance with this test method, the applicablestandard shall be used to establish preconditioning, conditioning andtesting conditions and requirements.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD7571 Spe
10、cification for Retained Sewn Seam StrengthAfterExposures to Hot Air and Open FlameE145 Specification for Gravity-Convection and Forced-Ventilation OvensE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Preci
11、sion of a Test MethodF1494 Terminology Relating to Protective Clothing2.2 AATCC Standard:Test Method 135 Dimensional Changes in Automatic HomeLaundering of Woven and Knit Fabrics32.3 NFPA Standards:NFPA1975 Standard on Station/Work Uniforms for Fire andEmergency Services43. Terminology3.1 Definition
12、s of Terms:3.2 For definitions of terms used in this test method, use thefollowing documents: If the terms are related to textiles refer toTerminology D123; if the terms are related to protectiveclothing refer to Terminology F1494.3.2.1 convective heat, nheat transferred by the motion ofa fluid.1Thi
13、s is under the jurisdiction of ASTM Committee F23 on Personal ProtectiveClothing and Equipment and is the direct responsibility of Subcommittee F23.80 onFlame and Thermal.Current edition approved Feb. 1, 2014. Published February 2014. Originallyapproved in 2011. Last previous edition approved in 201
14、2 as F2894 - 12b.DOI:10.1520/F2894-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from America
15、n Association of Textile Chemists and Colorists(AATCC), P.O. Box 12215, Research Triangle Park, NC 27709, http:/www.aatcc.org.4Available from National Fire Protection Association (NFPA), 1 BatterymarchPark, Quincy, MA 02169-7471, http:/www.nfpa.org.Copyright ASTM International, 100 Barr Harbor Drive
16、, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.2 degradation, na deleterious change in one or moreproperties of a material.3.2.2.1 DiscussionIn thermal testing of materials, protec-tive clothing and equipment, degradation is a material responseevidenced by a change in either or b
17、oth the visual propertiesand the performance properties of the test specimen.3.2.2.2 DiscussionDegradation generally is associatedwith a chemical composition change that can result in a changein a visual property, for example, color, or it can result in achange in a performance property including bu
18、t not limited tostrength, hand, flammability, penetration resistance, waterrepellency and air permeability.Atest specimen that changes inone property does not necessarily change in other properties.Evidence of degradation in performance properties usuallyrequires additional measurements related to p
19、roperties ofspecific interest. Discoloration is a visible material responserelated to degradation. When discoloration is observed, it shallbe reported.3.2.3 dimensional change, na generic term for change inlength or width of a specimen subjected to specified conditions3.2.3.1 DiscussionDimensional c
20、hange is usually ex-pressed as a percentage of the original dimension. Positivevalues for dimensional change indicate growth while negativevalues for dimensional change indicate shrinkage.3.2.4 distortion, nthermal testing of equipment, a speci-men response evidenced by a change in its original shap
21、e.3.2.4.1 DiscussionThis type of observation is generallyapplied to equipment items such as protective helmets and isbased on the placement of the item on a specific holding deviceplaced in the oven, such as a head form, and the measurementof the specimen relative to the holding device.3.2.5 functio
22、nality, nin thermal testing of protective cloth-ing and equipment, the continued utility of the test item asdetermined by an assessment of its capability to function afterthe heat exposure in the same manner as before its exposure toheat.3.2.5.1 DiscussionThis type of assessment is generallyapplied
23、to items of hardware or to portions of or completeprotective clothing and equipment items.3.2.6 ignition, nthe initiation of combustion.3.2.7 protective clothing, nan item of clothing that isspecifically designed and constructed for the intended purposeof isolating all or part of the body from a pot
24、ential hazard; or,isolating the external environment from contamination by thewearer of the clothing.3.2.8 protective equipment, na non-clothing item ofequipment that is specifically designed and constructed for theintended purpose of isolating all or part of the body from apotential hazard; or, iso
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMF28942014STANDARDTESTMETHODFOREVALUATIONOFMATERIALSPROTECTIVECLOTHINGANDEQUIPMENTFORHEATRESISTANCEUSINGAHOTAIRCIRCULATINGOVEN

链接地址:http://www.mydoc123.com/p-539677.html