ASTM F312-1997(2003) 膜滤器上航空流体中颗粒微观大小的测定及计数
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【英文标准名称】:StandardTestMethodsforMicroscopicalSizingandCountingParticlesfromAerospaceFluidsonMembraneFilters
【原文标准名称】:膜滤器上航空流体中颗粒微观大小的测定及计数
【标准号】:ASTMF312-1997(2003)
【标准状态】:现行
【国别】:
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:E21.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:膜过滤器;计数;分类;航天技术;电子工程;航空运输;材料;流体;航空航天运输;颗粒
【英文主题词】:aerospaceenvironments;aerospacefluids;aerospacegases;aerospacesurfaces;membranefilter;microscopicalcountingparticles;microscopicalsizingparticles;particulatemattercontamination
【摘要】:Reportedparticlesizemeasurementisafunctionofboththeactualparticledimensionandshapefactoraswellastheparticularphysicalorchemicalpropertiesoftheparticlebeingmeasured.Cautionisrequiredwhencomparingdatafrominstrumentsoperatingondifferentphysicalorchemicalparametersorwithdifferentparticlesizemeasurementranges.Sampleacquisition,handlingandpreparationcanalsoaffectthereportedparticlesizeresults.1.1Thesetestmethodscoverthedeterminationofthesizedistributionandquantityofparticulatemattercontaminationfromaerospacefluidsisolatedonamembranefilter.Themicroscopicaltechniquesdescribedmayalsobeappliedtootherproperlypreparedsamplesofsmallparticles.Twotestmethodsaredescribedforsizingparticlesasfollows:1.1.1TestMethodA8212;Particlesizesaremeasuredasthediameterofacirclewhoseareaisequaltotheprojectedareaoftheparticle.1.1.2TestMethodB8212;Particlesizesaremeasuredbytheirlongestdimension.1.2Thetestmethodsareintendedforapplicationtoparticlecontaminationdeterminationofaerospacefluids,gases,surfaces,andenvironments.1.3Thesetestmethodsdonotprovideforsizingparticlessmallerthan5m.Note18212;Resultsofthesemethodsaresubjecttovariablesinherentinanystatisticalmethod.Theuseofthesemethodsasastandardforinitiallyestablishinglimitsshouldbeavoidedunlessampletolerancesarepermissible.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:V04
【国际标准分类号】:
【页数】:4P.;A4
【正文语种】:
【原文标准名称】:膜滤器上航空流体中颗粒微观大小的测定及计数
【标准号】:ASTMF312-1997(2003)
【标准状态】:现行
【国别】:
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:E21.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:膜过滤器;计数;分类;航天技术;电子工程;航空运输;材料;流体;航空航天运输;颗粒
【英文主题词】:aerospaceenvironments;aerospacefluids;aerospacegases;aerospacesurfaces;membranefilter;microscopicalcountingparticles;microscopicalsizingparticles;particulatemattercontamination
【摘要】:Reportedparticlesizemeasurementisafunctionofboththeactualparticledimensionandshapefactoraswellastheparticularphysicalorchemicalpropertiesoftheparticlebeingmeasured.Cautionisrequiredwhencomparingdatafrominstrumentsoperatingondifferentphysicalorchemicalparametersorwithdifferentparticlesizemeasurementranges.Sampleacquisition,handlingandpreparationcanalsoaffectthereportedparticlesizeresults.1.1Thesetestmethodscoverthedeterminationofthesizedistributionandquantityofparticulatemattercontaminationfromaerospacefluidsisolatedonamembranefilter.Themicroscopicaltechniquesdescribedmayalsobeappliedtootherproperlypreparedsamplesofsmallparticles.Twotestmethodsaredescribedforsizingparticlesasfollows:1.1.1TestMethodA8212;Particlesizesaremeasuredasthediameterofacirclewhoseareaisequaltotheprojectedareaoftheparticle.1.1.2TestMethodB8212;Particlesizesaremeasuredbytheirlongestdimension.1.2Thetestmethodsareintendedforapplicationtoparticlecontaminationdeterminationofaerospacefluids,gases,surfaces,andenvironments.1.3Thesetestmethodsdonotprovideforsizingparticlessmallerthan5m.Note18212;Resultsofthesemethodsaresubjecttovariablesinherentinanystatisticalmethod.Theuseofthesemethodsasastandardforinitiallyestablishinglimitsshouldbeavoidedunlessampletolerancesarepermissible.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:V04
【国际标准分类号】:
【页数】:4P.;A4
【正文语种】:
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