【英文标准名称】:StandardTestMethodforDeterminationofTotalHydrocarbonContributionbyGasDistributionSystemComponents
【原文标准名称】:按气体分配系统成分测定总烃的测试方法
【标准号】:ASTMF1398-1993(2005)
【标准状态】:现行
【国别】:
【发布日期】:1993
【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】:F01.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:气体分配;试验;分布系统
【英文主题词】:Argon;Condensablehydrocarbons;Contamination;Flameionizationdetectors(FID);Flowandflowrate-semiconductorapplications;Gasdistributionsystems;Hydrocarbons;Instrumentalmeasurement;Massflowcontroller(MFC);Methane(CH[inf]4[reset
【摘要】:Thepurposeofthistestmethodistodefineaprocedurefortestingcomponentsbeingconsideredforinstallationintoahigh-puritygasdistributionsystem.Applicationofthistestmethodisexpectedtoyieldcomparabledataamongcomponentstestedforpurposesofqualificationforthisinstallation.1.1Thistestmethodcoversthetestingofcomponentsfortotalhydrocarbons(THC)contributiontoagasdistributionsystematambienttemperature.Inaddition,thistestmethodallowstestingofthecomponentatelevatedambienttemperaturesashighas70176C.1.2Thistestmethodappliestoin-linecomponentscontainingelectronicsgradematerialsinthegaseousform,suchasthoseusedinsemiconductorgasdistributionsystems.1.3Limitations:1.3.1Thistestmethodislimitedbythesensitivityofcurrentinstrumentation,aswellasbytheresponsetimeoftheinstrumentation.Thistestmethodisnotintendedtobeusedforcomponentslargerthan12.7-mm(1/2-in.)outsidediameternominalsize.Thistestmethodcouldbeappliedtolargercomponents;however,thestatedvolumetricflowratemaynotprovideadequatemixingtoensurearepresentativesample.Higherflowratesmayimprovethemixingbutexcessivelydilutethesample.1.3.2Differentinstrumentalmethods(suchasflameionizationdetector(FID),massspectrometer(MS))willyieldtotalhydrocarbon(THC)levelsthatarenotcomparableduetodifferentsensitivitiestodifferentmolecularspecies.Hydrocarboncontaminantsofhigh-puritygasdistributionsystemscanbesubdividedintotwogeneralcategories:(1)noncondensablehydrocarbons(lt;C4),thatarepresentduetodifficultyofremovalandrelativeatmosphericabundance,and(2)condensablehydrocarbons,thatareoftenleftbehindoncomponentsurfacesasresidues.Condensablehydrocarbonsincludepumpoils,degreasingagents,andpolishingcompoundvehicles.1.3.3Becauseofthetremendousdisparityofhydrocarbonspecies,itissuggestedthatdirectcomparisonsbemadeonlyamongdatagatheredusingthesamedetectionmethod.1.3.4Thistestmethodisintendedforusebyoperatorswhounderstandtheuseoftheapparatusatalevelequivalenttosixmonthsofexperience.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardstatementsaregiveninSection6.
【中国标准分类号】:J15
【国际标准分类号】:23_040_01
【页数】:10P.;A4
【正文语种】:


【英文标准名称】:Specificationforphenoliclaminatedsheetandepoxycottonfabriclaminatedsheet
【原文标准名称】:酚醛叠层板材与环氧树脂棉纤维叠层板材规范
【标准号】:BS2572-1990
【标准状态】:作废
【国别】:英国
【发布日期】:1990-11-30
【实施或试行日期】:1990-11-30
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Requirementsandpreferrednominalthicknessesfor20typesofphenoliclaminatedsheetandforonetypeofepoxylaminatedsheet.
【中国标准分类号】:G33
【国际标准分类号】:83_140_20
【页数】:42P;A4
【正文语种】:英语