AGUIDEFORINTERPRETATION OF NONDESTRUCTIVETESTS …

1 SSC-245 AGUIDEFORINTERPRETATIONOFNONDESTRUCTIVET ESTSOFORDINARY-, medium -,ANDHIGH-STRENGTH LOW-ALLOYSTEELBUTT-JOINTWELDMENTSINSHIPH ULLSTRUCTUREST hisdocumenthasbeenapprovedforpublicrelea seandsale; :Un, ,t,meAdmln! , , ,theShipStructureCommitteepublisheda GuideforInterpretationofNon DestructiveTestsofWeldsinShipHullStructu res -SSC 177, ,theCommitteepublished AGuideforUltrasonicTestingandEvaluationo fWeldFlaws SSC-213, , ,SSC-245, GuideforInterpretationofNon-DestructiveT estsofOrdinary , medium ~andHigh-Strength,Low AlloySteelWeldmentsinShipHullStructures, ,rules, ; , ,ShipStructureCommitteeFINALTECHNICALREP ORTonProjectSR-197 GUIDEFORINTERPRETATIONOFNONDESTRUCTIVETE STSOFORDINARY-, medium -,ANDHIGH-STRENGTH, LOW-ALLOYSTEELWELDMENTSINSHIPHULLSTRUCTU RESP reparedfortheSHIPSTRUCTURECOMMITTEE bytheWELDFLAWEVALUATIONCOMMITTEE oftheSHIPRESEARCHCOMMITTEEN ationalAcademyofSciences-- , ~y-, medium -,andhig7z-s*~ , , medium -, ~ soriginalpurposewastoprepareaguideforins pectin~ , ,however,thatalthoughtheguidesaresimilar forallship-gradesteelstrengths, , ,therefore, ,TheWeldFlawEvaluationCommittee-iii-SHIP STRUCTURECOMMITTEETheSHIPSTRUCTURECOMNIT TEE isconstitutedtoProsecutearesearchprogram toim~rovethehullstructuresofshipsbyanext ensionofknowledgepertainingtodesign, ,USCGC hief.

2 Andbyevaluatingandinterpretingtheresults intermsofshipstructuraldesign, ] , + $lBUREAUOFSHIPPINGAMERICANIRON& ,.. ,.. , ,, (CONT.) , (Undercuts) (DisregardLevel)..14 TypicalExampleofUltrasonicIndicationabov etheARL(AmplitudeRejectLevel).. ,..,.. ,..46 WeldsFlush-GroundandOneSideofWeldObstruc tedMinimumScanningProcedurewithonly.+..4 6 OneWeldBeadFlush-GroundandOneSideofWeldO bstructedMinimumScanningProcedurewithWel d~..46 BeadnotFlush-GroundandBothSidesofWeldAcc essibleMinimumScanningProcedurewithWeld ..46 BeadnotFlush-GroundandOneSideofWeldObstr ucted-viii-SCOPET hisdocumentdefinessuggestedacceptancecri teriafornondestructivetestingofordinary- , medium -,andhigh-strengthlow-alloy(HSLA) steelweldmentsinplatethicknessesfrom1/2i nchthrough3inchesasutilizedintheconstruc tionofhullsofmodernmerchantsurfacevessel sandsupersedesthecriteriarecommendedinSS C-177 :andSSC-213Y< <.

3 ItisnottheobjectofthisdocumentLOdesignat ethelocationorextentoftheinspectiononash ip shull, *WeldFlawEvaluationCommittee,WideforInte rpretationofNondestructiveTestsofWeldsin ShipHullStructures,SSC-177,ShipStructure Committee,Washington, ,..,.,..,Youshaw, ,AGuideforUltrasonicTestingandEvaluation ofWeldFlaws,SSC-213,ShipStructureConnnit tee,Washington, \CONVEXITY,C,\07,, .SHALLNOTEXCEED. , . + , GsACCEPTABLEFILLETWELDPROFILEkaQJsbJ22rI NSUFFICIENTEXCESSIVEUNDERCUTOVERLApINSUF FICIENTTHROATCONVEXITYLEGDEFECTIVEFILLET WELDPROFILESmREINFORCEMENT,R,#1 SHALLNOTEXCEED~/_\.+1/8 INCHr+ACCEPTABLEBUTTWELDPROFILEUNDERCUT, U,SHALLNOTEXCEED1/32 INCHINDEPTHANDFORALENGTHGREATERTHANONEIN CHt-qi+lm-----+!-=lki~ i-44L--G , NondestructiveTestPersonnelQualification andCertification--RecommendedPractice ,AmericanWeldingSociety,1968, (1)forsize,convexity,concavity,undercut, overlap,leg,throat, (sometimescalledpock-marks)isunacceptabl e.

4 ( ) ( ,withoutitsappendices, , ,forvariousindicationsofporosity, ( ) ( ),,,) ( )orlackoffusion( )havingindividuallengthinexcessof(1/4)To r3/8-inch,whicheverisless, (l)Tinany(6) ,theseparationbetweenadjacentdefects,alo ngthelengthoftheweld,shallnotbelessthan( 1/2)T, (~/2)Tor3/4-inch,whicheverislessandwhere Tisthethicknessofrhethinnerplate,areunac ceptable.( ) ( ) (1/2)Tor3/4-inch,whicheverisless,andwher ethetotalcumulativelengthofsuchdefectsex ceeds(l)Tinany(6)Tdistance, ,theweldisunacceptableiftheseparationbet weenadjacentdefects,alongthelengthofthew eld,ismorethan(1/2)T,whereTisagainthethi cknessoftheEhinnerplate,( ),,,, ( ) (ASTMG rade2in3 ) (ASTMG rade4in3/4-inchthickplate),&.&&&&?*%e&2~ :.* :%?&Y:$ (ASTMG rade2in3/4-inchthickplate) (ASTMG rade2in3/4-inchthickplate) (ASTMG rade3in2-inchthickplate) (ASTMG rade4in2-inchthickplate) (ASTMG rade2in2-inchthickplate).

5 (ASTMG rade2in2-inchthickplate) , ~ lil flJ1 1 // ],/,j,1,!,,,p,,,,,,7,,,1,~I~[M@!f#/1!,11 1,,,1,II,,,,i,,,,II1111,1 , Ill,1,/,,,,/,1/,,,,,111,1/1b11111 I,,1,,,I,,,1,M, ,$ :! ~ic falseindications canbeparticularlytroublesomeatthetoesoff illetweldsjoiningHSLA steels, falseindication .RandomarcstrikescausedbythetestprodsonH SLA materials,particularlyonthehigherstrengt hquenchedandtemperedgrades, (Q&T) )& ,porosityandlackoffusionareunacceptable; ~ (13--17).-12-Fi, ;. ,InterpretationStandardAllweldsurfacesco ntainingcracks,porosityandlackoffusionar eunacceptable; (18-21). (Undercuts) ,,,,,-,::15,,., ,10090 ARL 807060-1> (I)isregardLevel)./n9050 LDRL 4030I201011I1uI1!0< (AmplitudeRejectLevel). l-l\HIARL nJDRL III11L, , (DRL),( ), (ARL),{ ), ,( ), (1/4)Tor3/8inch,whicheverisless,whereTis thethicknessofthethinnerplate,areunaccep ~ (1/2)Tof3/4-inch,whicheverislessandwhere Tisthethicknessofthethinnerplate, (l)Tinany(6) (1/2) :E142*72 Amer!}

6 CanNa1!ona15tandardZ16671973 ApmovudJune2fi,1973 ByArrmncanNaoonalSimdmcisInsmu,cAMERICAN SOCIETYFORTESTINGANDMATERIALS1916 RmCCSt.,Phllmdalphla,Pm., [ (ASTMAPPENDIXAIfn.< ,currentmmhbmdIndex,WIIappar$nlhcnmltd,r,onStandardMethodforCONTROLLINGQUALITYOFRADIOGRAPHICTESTING Th!sStandardISl<%uedunder[hefixeddcs)gnatmnE142:thtnumberimmediate!followln~thedesignationtndmamthe~earoforiginaladopt]onor,In{hccaseO(revi+irm,[he>caroflastrev] ~!ndtcatmthe!earofIas( <beenapprovedh!theDqnorImtvIIOJfk{ !pcir(o{FcdcmlTe$rMt-thodSlo dord)VOISIh~ndfi)rIisringio[ !ondmd,<. ! ,qhrheArmIMulerfal$aridMechonn<~ < ,Mam02 Footnole6,inAppendixA2,wasaddeded!tormll>inMarch1974.., , , ,pur-chaseorder,productspecification, :physhallbeatleast2percent(2-2T),unlessa higherorlowerqualityisagreeduponbythepur chaserandthesupplier,NOTEI Referenceshouldb-tmadetothe( O ConnorD,T.))]]}}}

7 AndCrlscuolo, ,, TheQual-ityofRadiographicInspection, ASTMBu//elln,ASTBA, , , , ,HandbookNo, , ,andCesium-137 , [ theuseofXraysornuclearradiationorboth,to d~tcctdiscontinuitiesinmaterial, [ [rameter , $ource , , ~ Radiographidlysimilarma!crialrc. *Y30,1972, nalfypubliddwE142-59T, , AnnualBookOJASTMS iandards, [clj[mmcturholew,hid!musthercvci! ~diatlonabsorptionMthtma(crialhelngamult ip]corpcnetrtimcwrthickne~ ,rtidiographcd, ~yingradiogr~ ,thecontract,purchaseorder, ,exceptasspecifiedinspecification, ~examinationofdouble-tractualagreementpr ovidedthattheapplica-walledproductssucha spipingorduels, ,includingthethicknessot penetr~metcrtrametershallbeidentifiedwit hanumbershimswhichmayberequirtd(see6,2). , (Tablel).)]]]]

8 ASME penetrametersmaybeaccomplishedbydrilling alTholeadjacen~ ~TorSTholes,formtotherequirementsofthism ethodbutdonothavetheproperidentification maybeusedprovidedthatleadnumbersindicati ngpcnetrameterthicknessarcplacedadjacent tothepenetr~ ~-centtothecircularpenetrameterstoprovid eidentificationofthepenetrameteronthefil m(TableI). (2-2T),unlessahigherorlowerqualityis~ ,and2-4T(Not~4),aretivaikdde[hroughthede signand,. ! :ireshouldhetakeninspecifyingqualitylev- els?-IT,I-IT,findI-2 TbyftrsldctcrmlningthalIhescqualitylevel sranbem~ ~thisisnotpracticable, !a, kcpar~beingr<idi-ographed, , ,ap-proximately /,in.( )fromth~ ,ashimofthesametypeofmetalastheparentmet ~lshallbeplacedunderthepenetrarmetertopr ovidethemrne[hickncssofmaterialunderthep enetramcterastheavtiragcthicknessthrough theweld,Shimsshallexceedthepc-netrameter dimensionsbyatleast ~ndIheshimmedpenetramttcrshtillbdplactid soasnot10 ~llccip[ ,wherepracticnblt,ontheoutsdeof~ftepipea longsideIhtweldneares[:ite.]]]]

9 ;ourceO( ;r~ ~rame-terplacedonthesourcesideandacontin uousseriesofpenetrametersplacedonthefilm sideofalikepipesection, ,Ifthepenetrameteronthesourcesideindicat estherequiredsensitivity, , ,~heradiographictechniqueshallbedemonstr atedonasimilarpipesectionwiththeapplicab lepenetrametersplacedontheinsidealongthe rootoftheweld,andaserie$ofpenetrameters, , , ,thepenetrametershallbeplacedonthepartof theobjectfarthestI +30percent(Note5).Atle~stonepenetrameter perradi-ograph,exposedsimultaneouslywith thespec-imen, (Note6). 15or+ ~ ~cedinac-cordancewithSec[ion6,shuw,sfina cceptablesensitivityti![heIea>tdenseport ionoftheradiograph,thesetwopenetrameters willservetoqualify~hcradiograph, ,2 SimultaneousExposure,v WhenaPartorpartsofthe$amedesignareexpose dsimultaneouslyunderthesamegeometricalco nditionsina360-degradiationbeam, >.)]]

10 Whenfilmstireexposedsinlultancousiyinone filmholder,den-sityvariationsshouldbedet erminedonthesingleorsuperimposedfilms,re ferredtothemannerinwhichthejareintmprete d,NOTE6 Forpartsofirregulargeometryorwidelyvaryi ng[hickmxs, ,withoutinterferingwiththeinterpretation , , :thenameofthein-spectinglaboratory,theda tt,thepartnum-ber,theview, , , , ~ ~shallbemaintainedb~~hcinspecli !Radiographicprocedure~hrrllbecar-riedou tunderprotectedconditionssothattheradiog rapherwillnotreceiveamaximumwholebed}rad iationdosageexceedingthatp~rmittedbycity , ~ MinimumSpecimenThickness,in.(mm)ldmriifi -Cal; ,2-IT, (mm) (0,127) ( ) 1,, $( )?, ( ) 1,, ( ) 1, ( );1,,0,012( ) /80,020( ) ( ):0,150(3,810)7 ~lilyb?elsofln~ ( )( )( )(11.!1)(12,7)( )( )( )(127)(191) ThicknesstibleHoleSensitively,Diameterpe rcent ~.]