2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、Designation:D3612?02(Reapproved2009)StardTestMethodfAnalysisofGasesDissolvedinElectricalInsulatingOilbyGasChromatography1ThisstardisissuedunderthefixeddesignationD3612thenumberimmediatelyfollowingthedesignationindicatest

2、heyearofiginaladoptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thistestmethodcoversthre

3、eproceduresfextractionmeasurementofgasesdissolvedinelectricalinsulatingoilhavingaviscosityof20cSt(100SUS)lessat40C(104F)theidentificationdeterminationoftheindividualcomponentgasesextracted.Othermethodshavebeenusedtoperfm

4、thisanalysis.1.2Theindividualcomponentgasesthatmaybeidentifieddeterminedinclude:Hydrogen—H2Oxygen—O2Nitrogen—N2Carbonmonoxide—COCarbondioxide—CO2Methane—CH4Ethane—C2H6Ethylene—C2H4Acetylene—C2H2Propane—C3H8Propylene—C3H6

5、1.3Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.

6、Fspecificwarningstatementssee6.1.830.2.230.3.1.2.ReferencedDocuments2.1ASTMStards:2D2140PracticefCalculatingCarbonTypeCompositionofInsulatingOilsofPetroleumiginD2300TestMethodfGassingofElectricalInsulatingLiquidsUnderEle

7、ctricalStressIonization(ModifiedPirelliMethod)D2779TestMethodfEstimationofSolubilityofGasesinPetroleumLiquidsD2780TestMethodfSolubilityofFixedGasesinLiquids(Withdrawn2010)3D3613PracticefSamplingInsulatingLiquidsfGasAnaly

8、sisDeterminationofWaterContent(Withdrawn2007)3D4051PracticefPreparationofLowPressureGasBlendsE260PracticefPackedColumnGasChromatography2.2IEEEStard:C57.104GuideftheInterpretationofGasesGeneratedinOilImmersedTransfmers42.

9、3IECStard:PublicationNo.567GuideftheSamplingofGasesofOilfromOilFilledElectricalEquipmentftheAnalysisofFreeDissolvedGases53.Terminology3.1DefinitionsofTermsSpecifictoThisStard:3.1.1gascontentofoilbyvolume—inMethodAthetota

10、lvolumeofgasescrectedto760tr(101.325kPa)0Ccontainedinagivenvolumeofoilexpressedasapercentage.InMethodsBCthesumoftheindividualgasconcentrationscrectedto760tr(101.325kPa)0Cexpressedinpercentpartspermillion.3.1.2headspace—a

11、volumeofgasphaseincontactwithavolumeofoilinaclosedvessel.Thevesselisaheadspacevialof20mLnominalcapacity.3.1.2.1Discussion—OthervesselvolumesmayalsobeusedbuttheanalyticalperfmancemaybesomewhatdifferentthanthatspecifiedinM

12、ethodC.3.1.3partspermillion(ppm)byvolumeof(specificgas)inoil—thevolumeofthatgascrectedto760tr(101.325kPa)0Ccontainedin106volumeofoil.3.1.4spargingv—agitatingtheliquidsampleusingagastostripothergasesfree.1Thistestmethodis

13、underthejurisdictionofASTMCommitteeD27onElectricalInsulatingLiquidsGasesisthedirectresponsibilityofSubcommitteeD27.03onAnalyticalTests.CurrenteditionapprovedMay152009.PublishedJune2009.iginallyapprovedin1977.Lastprevious

14、editionapprovedin2002asD3612–02(2009).DOI:10.1520D361202R09.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheA

15、STMwebsite.3Thelastapprovedversionofthishisticalstardisreferencedonwww.astm.g.4AvailablefromIEEE345E.47thSt.NewYkNY10017.5AvailablefromInternationalElectrotechnicalCommission(IEC)3ruedeVarembCasepostale131CH1211Geneva20S

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