ASTM G74-2008 材料对气流冲击着火敏感度的标准试验方法

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【英文标准名称】:StandardTestMethodforIgnitionSensitivityofMaterialstoGaseousFluidImpact
【原文标准名称】:材料对气流冲击着火敏感度的标准试验方法
【标准号】:ASTMG74-2008
【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】:G04.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:gaseousfluidimpact;ignitionsensitivity;oxygenenrichedenvironment;Airanalysis;Gases;High-velocitygaseousimpacttesting;Ignition--rubber/cellularmaterials;Ignitionsensitivity;Impacttesting;Liquids--laboratoryapplications;Lubricating
【摘要】:Thistestevaluatestherelativesensitivityofmaterialstodynamicpressureimpactsbyvariousgaseousfluidmedia(mayincludemixturesofgases).Anychangeorvariationsintestspecimenconfigurations,thickness,preparation,andcleanlinessmaycauseasignificantchangeinimpactsensitivity/reaction.Areactionisindicatedbyanabruptincreaseintestspecimentemperatureorbyobviouschangesinodor,color,ormaterialappearance,oracombinationthereof,asobservedduringposttestexaminations.Odoraloneisnotconsideredpositiveevidencethatareactionhasoccurred.Suggestedcriteriafortestcompletionatagivenpressureare:Eachspecimenissubjectedtofiveimpacts.Amaterialpassesifnoreactionsoccurin20successivesamples.Amaterialfailsifonereactionoccursinamaximumof20orfewersuccessivesamples.Materialsmayberankedbythemaximumpressure(pressurethreshold)atwhichtheypassthetest.Materialacceptancemaybeonthebasisofpassingataselectedpressure.1.1Thismethoddescribesatechniquetodeterminetherelativesensitivityofmaterialstodynamicpressureimpactsbygasessuchasoxygen,air,orblendsofgasescontainingoxygen.1.2Thismethoddescribesthetestapparatusandtestproceduresthatmaybeemployedintheevaluationofmaterialsforuseingasesunderdynamicpressureoperatingconditionsuptogagepressuresof10000psi(69MPa)atambienttemperature.1.3Thismethodisprimarilyatestforrankingofmaterials.Thismethodisnotnecessarilyvalidfordeterminationofthesensitivityofthematerialsinanx201C;as-usedx201D;configurationsincethematerialsensitivitymaybealteredbecauseofchangesinmaterialconfiguration,usage,andenvironment.Acceptabilityofanymaterialmaybebasedonitsperformanceataparticulartestpressure,ortestpressuremaybevariedtodeterminethereactionthresholdofamaterial,asspecifiedbytheuser.1.4Thecriteriausedfortheacceptance,retest,andrejectionofmaterialsforanygivenapplicationshallbedeterminedbytheuserandarenotfixedbythismethod.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ForspecificprecautionsseeSection7.
【中国标准分类号】:C80
【国际标准分类号】:13_230
【页数】:7P.;A4
【正文语种】:英语