EN 12680-2-2003 en Founding - Ultrasonic examination - Part 2 Steel castings for highly stressed components《铸造 超声波检测 第2部分 高压部件用钢铸件》.pdf

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1、BRITISH STANDARD BS EN 12680-2:2003 Founding Ultrasonic examination Part 2: Steel castings for highly stressed components The European Standard EN 12680-2:2003 has the status of a British Standard ICS 77.040.20 BS EN 12680-2:2003 This British Standard was published under the authority of the Standar

2、ds Policy and Strategy Committee on 5 February 2003 BSI 5 February 2003 ISBN 0 580 41199 0 National foreword This British Standard is the official English language version of EN 12680-2:2003. The UK participation in its preparation was entrusted to Technical Committee ISE/NFE/9, Foundry technology,

3、which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the s

4、ection entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application

5、. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor

6、related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 35 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issu

7、ed. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN126802 January2003 ICS77.040.20 Englishversion FoundingUltrasonicexaminationPart2:Steelcastingsfor highlystressedcomponents FonderieContrleparultrasonsPartie2:Pices moulesenacierpourcomposa

8、ntsfortementsollicits GieereiwesenUltraschallprfungTeil2: StahlgussstckefrhochbeanspruchteBauteile ThisEuropeanStandardwasapprovedbyCENon21November2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstanda

9、rdwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibili

10、tyofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,S

11、pain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN126802:2003EEN1

12、26802:2003(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Requirements .5 4.1 Orderinformation . .5 4.2 Extentofexamination. .6 4.3 Maximumpermissiblesizeofdiscontinuities. 6 4.4 Personnelqualification . 6 4.5 Wallsectionzones .6 4.6 Severitylevels . .7 5

13、Examination7 5.1 Principles7 5.2 Material7 5.3 Equipment,couplingmedium,sensitivityandresolutionofdetection .8 5.4 Preparationofcastingsurfacesfortesting . .8 5.5 Examinationprocedure . 9 5.6 Examinationreport 12 AnnexA (normative) Resolutionofdetectionoftheinstrument/probecombination.20 AnnexB (inf

14、ormative) Soundbeamdiameters .21 AnnexC (informative) Typesofindications 23 Bibliography 35EN126802:2003(E) 3 Foreword Thisdocument(EN126802:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC190“FoundryTechnol ogy“,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalsta

15、ndard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJuly2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby July2003. Withinitsprogrammeofwork,TechnicalCommitteeCEN/TC190requestedCEN/TC190/WG4.10“Innerdefects“ topreparethefollowingstandard: EN126802, FoundingUltraso

16、nicexaminationPart2:Steelcastingsforhighlystressedcomponents. ThisisoneofthreeEuropeanStandardsforultrasonicexamination.Theotherstandardsare: EN126801, FoundingUltrasonicexaminationPart1:Steelcastingsforgeneralpurposes. EN126803, FoundingUltrasonicexaminationPart3:Spheroidalgraphitecastironcastings.

17、 AnnexAisnormative.AnnexesBandCareinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcoun triesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Net

18、herlands,Norway,Portugal,Spain,Swe den,SwitzerlandandtheUnitedKingdom.EN126802:2003(E) 4 1Scope ThisEuropeanStandardspecifiestherequirementsfortheultrasonicexaminationofsteelcastings(withferritic structure)forhighlystressedcomponentsandthemethodsfordetermininginternaldiscontinuitiesbythepulse echote

19、chnique. ThisEuropeanStandardappliestotheultrasonicexaminationofsteelcastingswhichhaveusuallyreceivedagrain refiningheattreatmentandwhichhavewallthicknessesuptoandincluding600mm. Forgreaterwallthicknesses,specialagreementsapplywithrespecttotestprocedureandrecordinglevels. ThisEuropeanStandarddoesnot

20、applytoausteniticsteelsandjointwelds. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevi

21、sionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN5831, NondestructivetestingUltrasonicexaminationPart1:Generalprinciples. EN5832, Nondestructivetesting

22、UltrasonicexaminationPart2:Sensitivityandrangesetting. EN5835:2000, NondestructivetestingUltrasonicexaminationPart5:Characterizationandsizingofdiscon tinuities. EN12223, NondestructivetestingUltrasonicexaminationSpecificationforcalibrationblockNo.1. EN126681, NondestructivetestingCharacterizationand

23、verificationofultrasonicexaminationequipment Part1:Instruments. EN126682, NondestructivetestingCharacterizationandverificationofultrasonicexaminationequipment Part2:Probes. EN126683, NondestructivetestingCharacterizationandverificationofultrasonicexaminationequipment Part3:Combinedequipment. EN27963

24、, WeldsinsteelCalibrationblockNo.2forultrasonicexaminationofwelds(ISO7963:1985). 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. NOTE OthertermsanddefinitionsusedinthisEuropeanStandardaregiveninEN5831,EN5832,EN5835and EN13304. 3.1 referencediscontinui

25、tyechosize smallestindicationtoberecordedduringtheassessmentphaseofanultrasonicexamination,usuallyexpressedas anequivalentflatbottomedholediameter 3.2 pointdiscontinuity discontinuity,thedimensionsofwhicharesmallerthanorequaltothesoundbeamdiameterEN126802:2003(E) 5 NOTE Dimensionsinthisstandardrelat

26、etolength,widthand/ordimensioninthroughwalldirection. 3.3 complexdiscontinuity discontinuity,thedimensionsofwhicharelargerthanthesoundbeamdiameter NOTE Dimensionsinthisstandardrelatetolength,widthand/ordimensioninthroughwalldirection. 3.4 planardiscontinuity discontinuityhavingtwomeasurabledimension

27、s 3.5 volumetricdiscontinuity discontinuityhavingthreemeasurabledimensions 3.6 specialrimzone outerrimzonepartwithspecialrequirements(fore.g.machinedsurfaces,higherstresses,sealingsurfaces) 3.7 productionwelding anyweldingcarriedoutduringmanufacturingbeforefinaldeliverytothepurchaser 3.7.1 jointweld

28、ing productionweldingusedtoassemblecomponentstogethertoobtainanintegralunit 3.7.2 finishingwelding productionweldingcarriedoutinordertoensuretheagreedqualityofthecasting 4Requirements 4.1 Orderinformation Thefollowinginformationshallbeavailableatthetimeofenquiryandorder(seealsoEN5831): theareasofthe

29、castingandthenumberorpercentageofcastingstowhichtheultrasonicexaminationrequire mentsapply; theseverityleveltobeappliedtothevariouszonesorareasofthecasting; requirementsforawrittenexaminationprocedure; whetherthereareanyadditionalrequirementsfortheexaminationprocedure,seealso5.5.1.EN126802:2003(E) 6

30、 4.2 Extentofexamination Thecastingshallbeexaminedsothattheagreedareasaretotallycovered(insofarasthisispossiblefromthe shapeofthecasting)bytheuseofthebestapplicableexaminationtechnique. Forwallthicknessesgreaterthan600mm,agreementshallbemadebetweenthepartiesconcernedonthetest procedureandalsoonthere

31、cordingandacceptancelevels. 4.3 Maximumpermissiblesizeofdiscontinuities 4.3.1General Thepurchasershallspecifytheacceptancelevelaccordingtotherequiredseveritylevelforplanarandvolumetric discontinuitieswithineachzoneandineachspecifiedareaofthecasting. ThewallsectionshallbedividedintozonesasshowninFigu

32、re1.Thesesectionsrelatetothesizesofcastings readyforassembly(finishmachined). 4.3.2 Indicationswithoutmeasurabledimensions Inspecialrimzonesandatweldpreparationends,indicationswithoutmeasurabledimensionsarelimitedtoa maximumnumberofindications. TheseindicationsshallnotexceedthelimitsgiveninTable1. 4

33、.3.3 Indicationswithmeasurabledimensions 4.3.3.1 Planardiscontinuities PlanardiscontinuitiesshallnotexceedthelimitsgiveninFigure2. Theareaofindicationwithmeasurablelengthbutwithnonmeasurabledimensioninthroughwalldirectionshallbe calculatedaccordingtotheformulagiveninFigure2. Thesizingofsmallplanardi

34、scontinuities,asgiveninFigure2,becomesmoredifficultwithincreasingbeampath lengthandsoundbeamdiameter.Asaguide,thesesizingsarenormallyappliedtoarimzoneof30mm.Itmakes theuseofprobeswithfocussedbeamssuchastwincrystalprobesnecessary. 4.3.3.2 Volumetricdiscontinuities Volumetricdiscontinuitiesshallnotexc

35、eedthesizesgiveninFigure3forrimzoneandFigure4forcorezone.Indi cationswithmeasurabledimensionsarenotpermissibleinseveritylevel1.Theareaofanindicationwithmeasur ablelengthbutnonmeasurablewidthshallbecalculatedinaccordancewiththeformulagiveninFigures3and4. 4.4Personnel qualification Itisassumedthatultr

36、asonicexaminationisperformedbyqualifiedandcapablepersonnel.Inordertoprovethis qualification,itisrecommendedtocertifypersonnelinaccordancewithEN473. 4.5 Wallsectionzones ThewallsectionshallbedividedintozonesasshowninFigure1.Thesesectionsrelatetothedimensionsofthe castingreadyforassembly(finishmachine

37、d).EN126802:2003(E) 7 4.6 Severitylevels Ifthepurchaserspecifiesdifferentseveritylevelsindifferentareasofthesamecasting,alloftheseareasshallbe clearlyidentifiedonthepurchasersdrawingandshallinclude: allnecessarydimensionsforaccuratelocationofzones; thefullextentofallweldpreparationsandthethicknessof

38、anyspecialrimzone. Severitylevel1isonlyappliedtoweldpreparationsandspecialrimzones. Unlessotherrequirementshavebeenagreedbythetimeofacceptanceoftheorder,forfinishingwelds,there quirementsfortheparentmetalshallapply. 5Examination 5.1Principles TheprinciplesofultrasonicexaminationgiveninEN5831,EN5832a

39、ndEN5835shallapply. 5.2Material Thesuitabilityofmaterialforultrasonicexaminationisassessedbycomparisonwiththeechoheightofareference reflector(usuallythefirstbackwallecho)andthenoisesignal.Thisassessmentshallbecarriedoutonselected castingareaswhicharerepresentativeofthesurfacefinishandofthetotalthick

40、nessrange.Theassessmentareas shallhaveparallelsurfaces. ThereferenceechoheightaccordingtoTable2shallbeatleast6dBabovethenoisesignal. Iftheechoheightofthissmallestdetectableflatbottomedorequivalentsidedrilledholediameterattheendofthe testrangetobeassessedislessthan6dBabovethegrasslevel,thentheultraso

41、nictestabilityisreduced.Inthis case,theflatbottomedorsidedrilledholediameterwhichcanbedetectedwithasignalnoiseratioofatleast6dB shallbenotedinthetestreportandtheadditionalprocedureshallbeagreedbetweenthemanufacturerandthe purchaser. NOTE Forthedefinitionofanadequateflatbottomedholesize,thedistancega

42、insizesystem(DGS)oratestblockof identicalmaterial,heattreatmentconditionandsectionthicknesscontainingflatbottomedholeswithadiameteraccordingto Table2orequivalentsidedrilledholes,canbeused.Thefollowingformulaisusedforconvertingtheflatbottomedholedi ameterintothesidedrilledholediameter: s D D = 2 FBH

43、Q l 4 935 , 4 (1) where D Q isthesidedrilledholediameterinmillimetres; D FBH istheflatbottomedholediameterinmillimetres; l isthewavelengthinmillimetres; s isthepathlengthinmillimetres. Theformulaisapplicablefor D Q 2 l and s 5 nearfieldlengthandisonlydefinedforsingleelementprobes.EN126802:2003(E) 8 5.3 Equipment,couplingmedium,sensitivityandresolutionofdetection 5.3.1 Ultrasonicinstrument TheultrasonicinstrumentshallmeettherequirementsgiveninEN126681andshallhavethef