Designation:D3283−98(Reapproved2012)StandardSpecificationforAirasanElectricalInsulatingMaterial1ThisstandardisissuedunderthefixeddesignationD3283;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationappliestoairusedasanelectricalinsulatingmaterialinelectricalequipment.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D2029TestMethodsforWaterVaporContentofElectricalInsulatingGasesbyMeasurementofDewPointE105PracticeforProbabilitySamplingofMaterialsE260PracticeforPackedColumnGasChromatography2.2OtherDocuments:SpecificationG-7.1CommoditySpecificationforAir33.Classification3.1ThisspecificationshallapplytoTypeI,gaseousair.4.Manufacture4.1Thisspecificationappliestobothatmosphericairandtoairsynthesizedbyblendingoxygenandnitrogeninproperproportions.5.CompositionandProperties5.1ThematerialshallconformtothechemicalrequirementsspecifiedinTable1.6.Sampling6.1GaseousAirinHighPressureMetalContainers—Extractsamplesfromthecontainerorcontainerswithanappropriatepressurereducingregulator.Screwthepressureregulatorinletconnectionontothecontainervalveoutlet.Connecttheregulatoroutletconnectiontothegassamplingpipeortothegasanalyzingequipmentbymeansofmetalorglasstubingexceptthatrubbertubingmaybeusedtosecurebuttjointsinmetal-to-glassorglass-to-glasstubing.Takecaretoensurethatalltubingiscleananddryandthesamplingapparatusisthoroughlypurgedofatmosphericairbeforethesampleistaken.Whereamultiplicityofcontainersaretobesampled,followPracticeE105ifitisconsideredsatisfactorytosamplelessthanthetotalnumberofcontainers.7.TestMethods7.1Thecomponent...
