ASTM_F_2894_-_14.pdf

Designation:F289414Standard 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 adoption 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 observations 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.1.2.1 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 method 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 plates,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 SI 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 this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1Flame resistant and heat resistant materials are described in arange of different standards and meet a range of different requirements.For materials tested 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 Specification 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 Precision 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 Definitions 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.1This 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 2012 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 American 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,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.2 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 both 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