Designation:B614−16StandardPracticeforDescalingandCleaningZirconiumandZirconiumAlloySurfaces1ThisstandardisissuedunderthefixeddesignationB614;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversacleaninganddescalingprocedureusefultoproducers,users,andfabricatorsofzirconiumandzirconiumalloysfortheremovalofordinaryshopsoils,oxides,andscalesresultingfromheattreatmentoperationsandforeignsubstancespresentassurfacecontaminants.1.2Itisnotintendedthattheseproceduresbecomemanda-toryforremovalofanyoftheindicatedsoilsbutratherserveasaguidewhenzirconiumandzirconiumalloysarebeingprocessedinthewrought,cast,orfabricatedform.1.3Itistheintentthatthesesoilsberemovedpriortochemicalmilling,joining,plating,welding,fabrication,andinanysituationwhereforeignsubstancesinterferewiththecorrosionresistance,stability,andqualityofthefinishedproduct.1.4Unlessasingleunitisused,forexample,solutionconcentrationsing/l,thevaluesstatedineitherinch-poundorSIunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.SIvaluescannotbemixedwithinch-poundvalues.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSections3and7.2.ReferencedDocuments2.1NFPAStandard:NFPA484StandardforCombustibleMetals23.ProcessingSoilRemoval3.1Grease,oil,andlubricantsemployedinmachining,forming,andfabricatingoperationsonzirconiumandzirco-niumalloysshouldberemovedbyemployingoneofthemethodsoracombinationofmethodsaslisted:(1)alkalineoremulsionsoak-typecleaners,(2)ultrasoniccleaning,(3)acetone,citru...
