标准资料网-标准资料免费资源平台

【英文标准名称】:Ambientairquality-StandardgravimetricmeasurementmethodforthedeterminationofthePM2,5massfractionofsuspendedparticulatematter;EnglishversionofDINEN14907
【原文标准名称】:环境空气质量.悬浮颗粒物质的PM2.5质量部分的测定用标准重量分析测量方法
【标准号】:DINEN14907-2005
【标准状态】:现行
【国别】:德国
【发布日期】:2005-11
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:质量浓度;重量分析的;重量分析法;悬浮尘埃;称重;环境空气;测量仪器;抽样方法;空气污染;空气净化;标准参考测量方法;维修;空气质量;测量不确定度;颗粒;质量控制;颗粒物质的测定;质量保证;定义;尘埃;测定;测量
【英文主题词】:Airpollution;Airpurification;Airquality;Ambientair;Definition;Definitions;Determination;Dust;Gravimetric;Gravimetry;Maintenance;Massconcentration;Measurement;Measuringincertainity;Measuringinstruments;Particles;Particulatemattermeasurement;Qualityassurance;Qualitycontrol;Referencemeasuringmethods;Samplingmethods;Suspendeddust;Weighing
【摘要】:ThisEuropeanStandarddescribesastandardmethodfordeterminingthePM215massconcentrationofsuspendedparticulatematterinambientairbysamplingtheparticulatematteronfiltersandweighingthembymeansofabalance.Measurementsaremadeoverasamplingperiodofabout24h,andinlinewiththeDirective.areexpressedaspg/m3,wherethevolumeofairisthevolumeatambientconditionsneartheinletatthetimeofsampling.Therangeofapplicationofthestandardisfrom1pg/m3(i.e.thelimitofdetectionofthestandardmeasurementmethodexpressedasitsuncertainty)upto120pg/m3(i.e.themaximumconcentrationlevelobservedduringthefieldstudyundertakenbyCEN/TC264/WG15tovalidatethestandard).NOTEAlthoughthestandardisnotvalidatedforconcentrationsover120pg/m3itsranaeofapplicationcouldwellbeextendedtocommonlyencounteredambientconcentrationsuptocirca200pg/m3whenusingglassorquartzfibrefilters.Atthesehighconcentrationsandparticulatemassloadingsnofiltercloggingistobeexpected.Alsotheflowratecanbeeasilymaintainedatthenominalsetting.TheequivalenceprocedureinAnnexAspecifiestwoapproaches,dependingonwhetherthecandidatemethoddiffersslightlyorfundamentallyfromthestandardmethod.Intheformercase,involvingonlyslightdifferencesfromthestandardmethod("variationsonatheme")AnnexAprovidesarestrictedproceduretocompareonlythepertinentdifferences,insteadofafullfieldtest.ThisQpartoftheannexservestogivepracticalguidancefordeterminingequivalenceformeasurementmethodscommonlyusedinmonitoringnetworks,andincludesexamplesofcommonvariationstothestandardmethod,suchasdifferentfilterstoringorconditioningproceduresandthevariationofthestandardmethodfortheapplicationasautomatedfilterchanger.Inthelattercase,involvingafullsetoffieldtests,theprocedureservestodetermineequivalenceonlywithintherangeofconditionsunderwhichthefieldtestsarecarriedout.TheequivalencecanbeshowntoholdforconditionsprevailingwithinEuropeancountriesbycarryingoutthefieldtestinsituationscoveringasuitablerangeofrelevantambientparameters(suchasconcentrationandcompositionofthesuspendedparticulatematter,temperature,andhumidity).AlthoughthisEuropeanStandarddoesnotexplicitlyaddressautomaticmonitoringmethodsforthemeasurementofthePM2.5massfractioninambientair,theequivalencetestprocedureinAnnexAappliesbothtonon-automaticandautomaticmethods.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_20
【页数】:29P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforAdhesionorCohesionStrengthofThermalSprayCoatings
【原文标准名称】:热喷涂层的粘附力或粘结强度的标准试验方法
【标准号】:ASTMC633-2001(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【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】:B08.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:adhesionstrength;cohesionstrength;fracturelocus;thermalspraycoatings;Coatingadhesion;Cohesivestrength;Flame-sprayedcoatings;Metalliccoatings;Strength
【摘要】:Thistestmethodisrecommendedforqualitycontrol,acceptancetesting;oritmayhelptodeveloporqualifyathermalsprayoperator''sequipmentandprocedureortoaidindevelopingthermalspraycoatingswithimprovedadhesionandintegrity.Thistestmethodisusefulforcomparingadhesionorcohesionstrengthsofcoatingsofsimilartypesofthermalspraymaterials.Thetestshouldnotbeconsideredtoprovideanintrinsicvaluefordirectuseinmakingcalculations,suchastodetermineifacoatingwillwithstandspecificenvironmentalstresses.Becauseofresidualstressesinthermalspraycoatings,actualstrengthdependsupontheshapeoftheparticularcoatedpart.Also,inuse,acoatingmaybestressedinamorecomplexmannerthanispracticalforastandardtest.1.1Thistestmethodcoversthedeterminationofthedegreeofadhesion(bondingstrength)ofacoatingtoasubstrateorthecohesionstrengthofthecoatinginatensionnormaltothesurface.Thetestconsistsofcoatingonefaceofasubstratefixture,bondingthiscoatingtothefaceofaloadingfixture,andsubjectingthisassemblyofcoatingandfixturestoatensileloadnormaltotheplaneofthecoating.Itisadaptedparticularlyfortestingcoatingsappliedbythermalspray,whichisdefinedtoincludethecombustionflame,plasmaarc,two-wirearc,high-velocityoxygenfuel,anddetonationprocessesforsprayingfeedstock,whichmaybeintheformof,wire,rod,orpowder.Note18212;Thermalspraycoatingmaterialsincludeceramics,suchasmetaloxidesorcarbides,andmetals.Insomecases,acoatingisformedofdifferentspraymaterials,suchasanoxidelayersprayedontoasprayedmetal-bondinglayer.Thesubstrategenerallyisametal,butmaybeaceramic,suchasanoxideorgraphite.1.2Usuallythistestmethodisperformedatambienttemperature.Highertemperaturetestingisrestrictedbytheneedforasuitableadhesivebondingagent.Forcertainfundamentalinvestigations,itissuggestedthatverylow(cryogenic)temperaturebeused.1.3Thistestmethodislimitedtotestingthermalspraycoatingsthatcanbeappliedinthicknessgreaterthan0.015in.(0.38mm).Thelimitationisimposedbecauseanadhesivebondingagentisusedinthetest.Thosebondingagentsestablishedsofarforthismethodtendtopenetratethermalspraycoatingsandmayinvalidateresultsunlessthecoatingsarethickenoughtopreventpenetrationthroughthecoating.Furtherdevelopmentmayestablishthatthinlayersofcertaintypesofespeciallydensecoatingsmaybetestedsatisfactorily.Alternatively,newadhesivebondingagentsthatwouldallowreductionoftheminimumthicknesslimitationmaybecomeavailable.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthlimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40
【页数】:7P.;A4
【正文语种】:英语