Designation:G93−03(Reapproved2011)StandardPracticeforCleaningMethodsandCleanlinessLevelsforMaterialandEquipmentUsedinOxygen-EnrichedEnvironments1ThisstandardisissuedunderthefixeddesignationG93;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverstheselectionofmethodsandapparatusforcleaningmaterialsandequipmentintendedforserviceinoxygen-enrichedenvironments.Contaminationproblemsencounteredintheuseofenrichedair,mixturesofoxygenwithothergases,oranyotheroxidizinggasmaybesolvedbythesamecleaningproceduresapplicabletomostmetallicandnonmetallicmaterialsandequipment.Cleaningexamplesforsomespecificmaterials,components,andequipment,andthecleaningmethodsforparticularapplications,aregivenintheappendices.1.2Thispracticeincludeslevelsofcleanlinessusedforvariousapplicationsandthemethodsusedtoobtainandverifytheselevels.1.3Thispracticeappliestochemical-,solvent-,andaqueous-basedprocesses.1.4Thispracticedescribesnonmandatorymaterialforchoosingtherequiredlevelsofcleanlinessforsystemsexposedtooxygenoroxygen-enrichedatmospheres.1.5Thispracticeproposesapracticalrangeofcleanlinesslevelsthatwillsatisfymostsystemneeds,butitdoesnotdealinquantitativedetailwiththemanyconditionsthatmightdemandgreatercleanlinessorthatmightallowgreatercon-taminationlevelstoexist.Furthermore,itdoesnotproposespecificwaystomeasureormonitortheselevelsfromamongtheavailablemethods.1.6Thevaluesstatedinbothinch-poundandSIunitsaretoberegardedseparatelyasthestandardunit.Thevaluesgiveninparenthesesareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Federal,stateandlocalsafetyanddisposa...
