基本信息
标准名称: | 鱼雷燃烧泵通用规范 |
中标分类: |
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ICS分类: |
军事工程 >>
军事工程、军事物资、武器
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发布日期: | 1995-12-19 |
实施日期: | 1996-08-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
页数: | 12页 |
适用范围
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前言
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引用标准
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所属分类: 军事工程 军事工程 军事物资 武器
【英文标准名称】:StandardTestMethodforMicrovacuumSamplingandIndirectAnalysisofDustbyTransmissionElectronMicroscopyforAsbestosStructureNumberSurfaceLoading
【原文标准名称】:用石棉结构值表面负荷用透射电子显微镜对尘埃微真空取样和间接分析的标准试验方法
【标准号】:ASTMD5755-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D22.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:asbestos;microvacuuming;settleddust;TEM;Microscopicexamination--atmospheric;Microvacuumsampling;Morphology;Samplingair/atmosphericmaterials/applications;Selectedareaelectrondiffraction(SAED);Settleddust;TEM(transmissionelectronmi
【摘要】:Thismicrovacuumsamplingandindirectanalysismethodisusedforthegeneraltestingofnon-airbornedustsamplesforasbestos.Itisusedtoassistintheevaluationofdustthatmaybefoundonsurfacesinbuildingssuchasceilingtiles,shelving,electricalcomponents,ductwork,carpet,etc.ThistestmethodprovidesanindexofthesurfaceloadingofasbestosstructuresinthedustperunitareaanalyzedasderivedfromaquantitativeTEManalysis.Thistestmethoddoesnotdescribeproceduresortechniquesrequiredtoevaluatethesafetyorhabitabilityofbuildingswithasbestos-containingmaterials,orcompliancewithfederal,state,orlocalregulationsorstatutes.Itistheuser''sresponsibilitytomakethesedeterminations.Atpresent,norelationshiphasbeenestablishedbetweenasbestos-containingdustasmeasuredbythistestmethodandpotentialhumanexposuretoairborneasbestos.Accordingly,theusersshouldconsiderotheravailableinformationintheirinterpretationofthedataobtainedfromthistestmethod.Thisdefinitionofdustacceptsallparticlessmallenoughtopassthrougha1mm(No.18)screen.Thus,asingle,largeasbestoscontainingparticle(s)(fromthelargeendoftheparticlesizedistribution)dispersedduringsamplepreparationmayresultinanomalouslylargeasbestossurfaceloadingresultsintheTEManalysesofthatsample.Itis,therefore,recommendedthatmultipleindependentsamplesaresecuredfromthesamearea,andthataminimumofthreesamplesbeanalyzedbytheentireprocedure.1.1Thistestmethodcoversaprocedureto(a)identifyasbestosindustand(b)provideanestimateofthesurfaceloadingofasbestosinthesampleddustreportedasthenumberofasbestosstructuresperunitareaofsampledsurface.1.1.1Ifanestimateoftheasbestosmassistobedetermined,theuserisreferredtoTestMethodD5756.1.2Thistestmethoddescribestheequipmentandproceduresnecessaryforsampling,byamicrovacuumtechnique,non-airbornedustforlevelsofasbestosstructures.Thenon-airbornesampleiscollectedinsideastandardfiltermembranecassettefromthesamplingofasurfaceareafordustwhichmaycontainasbestos.1.2.1Thisprocedureusesamicrovacuumingsamplingtechnique.Thecollectionefficiencyofthistechniqueisunknownandwillvaryamongsubstrates.Propertiesinfluencingcollectionefficiencyincludesurfacetexture,adhesiveness,electrostaticpropertiesandotherfactors.1.3Asbestosidentifiedbytransmissionelectronmicroscopy(TEM)isbasedonmorphology,selectedareaelectrondiffraction(SAED),andenergydispersiveX-rayanalysis(EDXA).Someinformationaboutstructuresizeisalsodetermined.1.4Thistestmethodisgenerallyapplicableforanestimateofthesurfaceloadingofasbestosstructuresstartingfromapproximately1000asbestosstructurespersquarecentimetre.1.4.1Theprocedureoutlinedinthistestmethodemploysanindirectsamplepreparationtechnique.Itisintendedtodisperseaggregatedasbestosintofundamentalfibrils,fiberbundles,clusters,ormatricesthatcanbemoreaccuratelyquantifiedbytransmissionelectronmicroscopy.However,aswithallindirectsamplepreparationtechniques,theasbestosobservedforquantificationmaynotrepresentthephysicalformoftheasbestosassampled.Morespecifically,theproceduredescribedneithercreatesnordestroysasbestos,butitmayalterthephysicalformofthemineralfibers.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.......
【中国标准分类号】:C51
【国际标准分类号】:13_040_20
【页数】:14P.;A4
【正文语种】:英语