Designation:F310−07(Reapproved2012)StandardPracticeforSamplingCryogenicAerospaceFluids1ThisstandardisissuedunderthefixeddesignationF310;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thispracticedescribesproceduresfortakingasampleofcryogenicaerospacefluidforanalysis.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatoryrequirementspriortouse.Forhazardstatement,seeSection5.2.ReferencedDocuments2.1ASTMStandards:2F311PracticeforProcessingAerospaceLiquidSamplesforParticulateContaminationAnalysisUsingMembraneFil-tersG93PracticeforCleaningMethodsandCleanlinessLevelsforMaterialandEquipmentUsedinOxygen-EnrichedEnvironmentsG127GuidefortheSelectionofCleaningAgentsforOxy-genSystems3.SummaryofPractice3.1DewarFlaskProcedure—AcleanDewarFlaskisusedtocollectasampleofcryogenicaerospacefluideitherfromasamplingvalve,orpouredfromalargerDewarflaskusedforstorage.3.2CryogenicSamplerProcedure—Thesamplerisusedtowithdrawasmallamountofliquefiedgasfromalargesupply.Thesamplerisallowedtocooluntilasteadystreamofcryogenicliquidexistsinthesampler.Oncethesamplingvalvesareclosedthetrappedliquidwillconverttoagasandpressurizethesamplingvessel.4.ApparatusandMaterials4.1ApparatusandMaterialsCommontoBothProcedures:4.1.1ProtectiveClothing,suchasanapron,face-shield,andthermalgloves.Coverallsmeetingsafetyrequirementsforstaticdissipation,andflammabilitymayberequireddependingonlocalsafetyregulationsoroperatingprocedures.Whitecoverallsarerecommendedwhileworkingwithcryogenicoxygenastheywillshowdirtoroilwhichmayreactviolentlywithcryogenicoxygen.4.1.2WashBottle,1...
