SSPC-SP5

SSPC-SP5/NACENo.1September1,200055JointSurfacePreparationStandardSSPC-SP5/NACENO.1WhiteMetalBlastCleaningThisSSPC:TheSocietyforProtectiveCoatingsandNACEInternationalstandardrepresentsaconsensusofthoseindividualmemberswhohavereviewedthisdocu-ment,itsscopeandprovisions.Itsacceptancedoesnotinanyrespectprecludeanyone,havingadoptedthestandardornot,frommanufacturing,marketing,purchasing,orusingproducts,processes,orproceduresnotinconformancewiththisstandard.Nothingcontainedinthisstandardistobeconstruedasgrantinganyright,byimplicationorotherwise,tomanufacture,sell,oruseinconnectionwithanymethod,apparatus,orproductcoveredbyLettersPatent,orasindemnifyingorprotectinganyoneagainstliabilityforin-fringementofLettersPatent.Thisstandardrepresentsminimumrequirementsandshouldinnowaybeinterpretedasarestrictionontheuseofbetterproceduresormaterials.Neitheristhisstandardintendedtoapplyinallcasesrelatingtothesubject.Unpredictablecircumstancesmaynegatetheusefulnessofthisstandardinspecificinstances.SSPCandNACEassumenoresponsibilityfortheinterpre-tationoruseofthisstandardbyotherpartiesandacceptresponsibilityforonlythoseofficialinterpretationsissuedbySSPCorNACEinaccordancewiththeirrespectivegovern-ingproceduresandpolicies,whichprecludetheissuanceofinterpretationsbyindividualvolunteers.Usersofthisstandardareresponsibleforreviewingappropriatehealth,safety,andregulatorydocumentsandfordeterminingtheirapplicabilityinrelationtothisstandardpriortoitsuse.ThisSSPC/NACEstandardmaynotneces-sarilyaddressallpotentialhealthandsafetyproblemsorenvironmentalhazardsassociatedwiththeuseofmaterials,equipmentand/oroperationsdetailedorreferredtowithinthisstandard.Usersofthisstandardarealsoresponsibleforestablishingappropriatehealth,safety,andenvironmentalprotectionpractices,inconsultationwithappropriateregu-latoryauthorities,ifnecessary,toachievecompliancewithanyexistingapplicableregulatoryrequirementspriortotheuseofthisstandard.CAUTIONARYNOTICE:SSPC/NACEstandardsaresubjecttoperiodicreviewandmayberevisedorwithdrawnatanytimewithoutpriornotice.SSPCandNACErequirethatactionbetakentoreaffirm,revise,orwithdrawthisstandardnolaterthanfiveyearsfromthedateofinitialpublication.Theuseriscautionedtoobtainthelatestedition.Purchasersmayreceivecurrentinformationonallstandardsandotherpublicationsbycontactingtheorgani-zationsattheaddressesbelow:©NACEInternationalP.O.Box218340Houston,TX77218-8340(telephone[phone])©SSPC:TheSocietyforProtectiveCoatings4024thStreet,SixthFloorPittsburgh,PA15222(telephone[phone])ForewordThisjointstandardcoverstheuseofblastcleaningabrasivestoachieveadefineddegreeofcleaningofsteelsurfacespriortotheapplicationofaprotectivecoatingorliningsystem.Thisstandardisintendedforusebycoatingorliningspecifiers,applicators,inspectors,orotherswhoseresponsibilityitmaybetodefineastandarddegreeofsurfacecleanliness.Thefocusofthisstandardiswhitemetalblastcleaning.Near-whitemetalblastcleaning,commercialblastcleaning,industrialblastcleaningandbrush-offblastcleaningareaddressedinseparatestandards.Whitemetalblastcleaningprovidesagreaterdegreeofcleaningthannear-whiteblastcleaning(SSPC-SP10/NACENo.2).Thedifferencebetweenawhitemetalblastandanear-whiteblastisthatawhitemetalblastremovesallofthecoating,millscale,rust,oxides,corrosionproducts,andotherforeignmatterfromthesurface.Near-whiteblastingallowslightshadows,slightstreaks,orminordiscolorationscausedbystainsofrust,stainsofmillscale,orstainsofpreviouslyappliedcoatingtoremainonnomorethan5percentofeachunitareaofsurface.ThisjointstandardwaspreparedbytheSSPC/NACETaskGroupAonSurfacePreparationbyAbrasiveBlastCleaning.ThisjointTaskGroupincludesmembersofboththeSSPCSurfacePreparationCommitteeandtheNACEUnitCommitteeT-6GonSurfacePreparation.1.General1.1Thisjointstandardcoverstherequirementsforwhitemetalblastcleaningofunpaintedorpaintedsteelsurfacesbytheuseofabrasives.Theserequirementsincludetheendconditionofthesurfaceandmaterialsandproceduresnecessarytoachieveandverifytheendcondi-tion.SSPC-SP5/NACENo.1September1,2000561.2ThemandatoryrequirementsaredescribedinSections1to9asfollows:Section1GeneralSection2DefinitionSection3ReferencesSection4ProceduresBeforeBlastCleaningSection5BlastCleaningMethodsandOperationSection6BlastCleaningAbrasivesSection7ProceduresFollowingBlastCleaningandImmediatelyPriortoCoatingSection8InspectionSection9SafetyandEnvironmentalRequirementsNOTE:Section10,“Comments”andAppendixA,“Explana-toryNotes”arenotmandatoryrequirementsofthisstan-dard.2.Definition2.1Awhitemetalblastcleanedsurface,whenviewedwithoutmagnification,shallbefreeofallvisibleoil,grease,dust,dirt,millscale,rust,coating,oxides,corrosionprod-ucts,andotherforeignmatter.2.2AcceptablevariationsinappearancethatdonotaffectsurfacecleanlinessasdefinedinSection2.1includevariationscausedbytypeofsteel,originalsurfacecondi-tion,thicknessofthesteel,weldmetal,millorfabricationmarks,heattreating,heataffectedzones,blastingabra-sives,anddifferencesduetoblastingtechnique.2.3Whenacoatingisspecified,thesurfaceshallberoughenedtoadegreesuitableforthespecifiedcoat