ASTM E479-1991(2006) 泄漏试验规格的准备

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【英文标准名称】:StandardGuideforPreparationofaLeakTestingSpecification
【原文标准名称】:泄漏试验规格的准备
【标准号】:ASTME479-1991(2006)
【标准状态】:现行
【国别】:
【发布日期】:1991
【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】:E07.08
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:准备;不渗透性;试验;漏泄试验;指导手册;无损检验;金属
【英文主题词】:
【摘要】:Foranyproducttobetestedthegeometricalcomplexitywillvarywidely.However,thebasicconceptofdetermininganoperativeleakagespecificationregardlessofgeometriesismuchthesameforall,whetheritbesimple,ordinary,orcomplex.ThedatarequiredforwritingtheOS,whichistotalleakage(moles),time(s),andpressuredifferenceacrosstheleak,areeitheravailableorcanbedeterminedbytestsormeasurements.Auserwhoselectsvaluestobeusedinaleakagespecificationasaresultofsomeoneelsehavingusedthevalueorsimplybecauseofprestigereasons,mayfindthevalueorvaluesunsatisfactoryfortheproduct.Aspecificationthatistoorestrictivemayresultinexcessiveleaktestingcosts.Aspecificationthatisnotrestrictiveenoughmayresultinprematureproductfailure,orincreasedwarrantycosts,orboth.Atypicalillustrationfordeterminingaleakagespecification,usingthecomplexgeometryofarefrigerantsystemforanexample,willbeusedthroughoutthisrecommendedguide.Itiswelltopointoutthattheusershouldrealizethatthevaluesandtestmethodsselecteddonotnecessarilyrepresentthebestortypicalonesforthisapplication.1.1Thisstandardisintendedasaguide.Itenumeratesfactorstobeconsideredinpreparingadefinitivespecificationformaximumpermissiblegasleakageofacomponent,device,orsystem.Theguiderelatesandprovidesexamplesofdataforthepreparationofleaktestingspecifications.Itisprimarilyapplicableforuseinspecifyinghalogenleaktestingmethods.1.2Twotypesofspecificationsaredescribed:1.2.1Operationalspecifications(OS),and1.2.2Testingspecifications(TS):Total,andEachleak.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H20
【国际标准分类号】:77_040_99
【页数】:5P.;A4
【正文语种】: