三星造船质量标准3STAR[1]

(SSQS)iscompiledinanefforttostandardizetheproductionandqualitycontrolpracticesforthebuildingofnewvesselsinSamsungHeavyIndustriesCo.,Ltd.Consideringtheimportanceofthequalitycontrolintheshipbuildingindustry,theprocesscontrolpolicyhasbeenemphasizedasthebasicqualitycontrolpolicytominimizepotentialdefectsateachproductionstageandtoassurethequalityofthefinalproducts.Thisbookletconsistsoftwosections;-QualityStandard-ScopeofInspectionTheStandardmentionedinthebookletwillbegenerallyappliedtothequalitycontroloftheshipbuildingattheGeojeShipyard.4PARTA.QUALITYSTANDARD.HULLPART1.Material2.Welding3.Marking4.Cutting5.Fabrication6.Accuracyofhullform7.Deformation8.Details9.Surfacefinishcondition10.Markingonshipside.PAINTINGPART1.Primarysurfacepreparationandpre-priming2.Secondarysurfacepreparation3.Painting4.Ambientcondition5.D.F.TMeasurement6.TimeforD.F.TMeasurement.OUTFITTINGPART1.Mainmachinery2.Auxiliarymachinery3.Piping4.Sheetmetaloutfitting5631376I.HULLPART1.MATERIAL1-1.Rolledplate1-1-1.Definitionofimperfectionanddefect-Animperfectionissomefeaturewhichintroducesanirregularityinanotherwiseuniformstructure.-Adefectisaspecificimperfectionwhichimpairsthesuitabilityofthatstructureforitsintendedpurpose.Inordertodetermineifaparticularimperfectionisactuallyadefect,theremustbesomestandardwhichdefinestheacceptablelimitsofthatimperfection.Whenitssizeorconcentrationexceedstheselimits,itisdeemedadefect.Wecanthereforethinkofadefectassimplyarejectableimperfection.Imperfectionsrelatedtothefollowingdiscontinuities.:Pitting,rolledinscale,indentations,rollmarks,scratchesandgroovesDefectsrelatedtothefollowingdiscontinuities.:Cracks,shells,seams,spills,blisters,hottearsandsandpatches7Arearatio(%)=AreaofpittingTotalareaofsteelsurface100ObjectDetailCorrection/Remarks1.GradeA:Repairisunnecessary.2.GradeB:1)Outersurfaceofshellplates:Toberepairedbygrinding(ifnecessary)(Whenpaintingwithepoxycannotbedone,grindingistobecarriedout.)2)Others:Repairisunnecessary.3.GradeC:1)Outersurfaceofshellplates:Toberepairedbygrinding2)Others:Paintingwithepoxytobecarriedout4.GradeD:Repairmethodistobedeterminedafterdiscussionwithownerandclass.Recommendedrepairmethod:Grindingfollowedbywelding5.Thegroundareashallnotexceedthetolerancesasfollows.1)Singlegroundarea:0.252)Totalgroundarea:2%ofthetotalsurfacearea6.Repairedareabyweldingshallnotexceed:1)Singlegroundarea:0.1252)Totalgroundarea:2%ofthetotalsurfaceareaofthesideinvolvedGradeofpittingArearatio25ABCDB0.150.300.500.800.07t%DepthmmPit1-1-2.SurfaceImper-fections8ObjectDetailCorrection/Remarks1.GradeA:Repairisunnecessary.GradeB:ToberepairedifnecessaryGradeC:Toberepaired2.RepairmethodDepthofdefects:dPlatethickness:t1)d0.07t(max.3mm)Removedbygrinding2)0.07td0.2tGrindingfollowedbywelding(Theweldedareashouldbelessthan2%ofthetotalsurfacearea.)1.GradeA:Repairisunnecessary.GradeB:Repairisnecessary.2.RepairmethodDepthofdefects:dPlatethickness:t1)d0.07t(max.3mm):Grinding2)0.07td0.2t:Weldingandgrinding3.Theweldedareashouldbelessthan2%ofthetotalareaofaplate.Gradeofsurfaceflaking1-1-2.SurfaceImper-fectionsFlakingInden-tation(otherdefects)GradeofindentationArearatioDepthDepthBBCAAmm0.5%100Arearatiodtmm%9ObjectDetailCorrection/RemarksUnit:mmIncasewheretherangeoflaminationislimited,itcanbechippedoutandbuilt-upbyweldingasshownin(a).Incasewheretherangeoflaminationislimited,butisalsoneartheplatesurface,itispreferabletomakethebuilt-upweldingasshownin(b).Itmustbecarefullyexaminedwhethertheprocedureisacceptableornot,incasewherethedegreeofthelaminationismoresevereanddefective.Itisrecommendedtoexchangelocallytheplate,incasewheretherangeoflaminationisfairlyextensive.Thestandardminimumbreadthofplatetobeexchanged:ShellandstrengthdeckplatinginwayofcruciformorT-joints1,600mmShell,strengthdeckplatingandotherprimarymembers800mmOtherstructuralmembers300mmIncasewherecavity,crackandotherinjuriousdefectsarefound,1)Removethedefectsbygouging.2)Gougedareasshallbeweldedinaccord-ancewithmakersrecommendationand/oranapprovedWPS.3)Repairedareasshallbecheckedbymag-neticparticletestingorultrasonictesting.a1ta1t1-1-3.Lamina-tionLocallamina-t