Designation:F2894−14StandardTestMethodforEvaluationofMaterials,ProtectiveClothingandEquipmentforHeatResistanceUsingaHotAirCirculatingOven1ThisstandardisissuedunderthefixeddesignationF2894;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversquantitativemeasurementsandsubjectiveobservationsthatcharacterizetheperformanceforevaluatingtheheatresistanceofmaterials,protectiveclothingandequipmentwhenexposedinahotaircirculatingoven.1.2Thistestmethodisintendedtoevaluatephysicalchangesinmaterials,protectiveclothingandequipmentataspecifiedheatexposure.1.2.1Thespecifiedheatexposureinthehotaircirculatingovenisacombinationofconvectiveheatandradiantheat.1.3Materials,protectiveclothingandequipmentareevalu-atedforvisiblechangesorsubjectedtoamaterialpropertymeasurementfollowingaspecifiedheatexposure.1.3.1Thistestmethodisnottobeusedfortheevaluationofsticking.AnacceptablemethodforevaluatingstickingoffabricsisdescribedinNFPA1975,Sections7.2.1and8.3.TheNFPA1975testmethodevaluatesthethermalstabilityofspecimensbyassessingtheblockingoffoldedspecimensplacedbetweenglassplates,underaspecifiedweight,insideanovenmeetingthesamecharacteristicsoftheovenusedinthistestmethod.1.4Thistestmethodenablesthequantitativemeasurementofdimensionalchangethatoccursasaresultofaspecifiedheatexposureinahotaircirculatingoven.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstootherunitsthatarecommonlyusedforthermaltesting.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—Flameresistantandheatresistantmaterialsaredescribedinarangeofd...
