1、BRITISH STANDARD BS EN 12680-1:2003 Founding Ultrasonic examination Part 1: Steel castings for general purposes The European Standard EN 12680-1:2003 has the status of a British Standard ICS 77.040.20 BS EN 12680-1:2003 This British Standard was published under the authority of the Standards Policy
2、and Strategy Committee on 5 February 2003 BSI 5 February 2003 ISBN 0 580 41198 2 National foreword This British Standard is the official English language version of EN 12680-1:2003. It supersedes BS 6208:1990 which is withdrawn. The UK participation in its preparation was entrusted to Technical Comm
3、ittee ISE/NFE/9, Foundry technology, 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 f
4、ound in the BSI Catalogue under the section 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 re
5、sponsible for its correct application. 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 kee
6、p the UK interests informed; monitor 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 33 and a back cover. The BSI copyright date displayed in this document indi
7、cates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN126801 January2003 ICS77.040.20 Englishversion FoundingUltrasonicexaminationPart1:Steelcastingsfor generalpurposes FonderieContrleparultrasonsPartie1:Pi
8、ces moulesenacierpourusagesgnraux GieereiwesenUltraschallprfungTeil1: StahlgussstckefrallgemeineVerwendung ThisEuropeanStandardwasapprovedbyCENon21November2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanation
9、alstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresp
10、onsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Sl
11、ovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN126801:
12、2003EEN126801:2003(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 .7 4.6 Severitylevels
13、 . .7 5 Examination7 5.1 Principles7 5.2 Material7 5.3 Equipmentandcouplingmedium . .8 5.4 Preparationofcastingsurfacesforexamination . 8 5.5 Examinationprocedure . 9 5.6 Examinationreport 11 AnnexA (informative) Soundbeamdiameters .19 AnnexB (informative) Typesofindications 21 Bibliography 33EN1268
14、01:2003(E) 3 Foreword Thisdocument(EN126801:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC190“FoundryTechnol ogy“,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJuly2003,andconflictingna
15、tionalstandardsshallbewithdrawnatthelatestby July2003. Withinitsprogrammeofwork,TechnicalCommitteeCEN/TC190requestedCEN/TC190/WG4.10“Innerdefects“ topreparethefollowingstandard: EN126801, FoundingUltrasonicexaminationPart1:Steelcastingsforgeneralpurposes. ThisisoneofthreeEuropeanStandardsforultrason
16、icexamination.Theotherstandardsare: EN126802, FoundingUltrasonicexaminationPart2:Steelcastingsforhighlystressedcomponents. EN126803, FoundingUltrasonicexaminationPart3:Spheroidalgraphitecastironcastings. AnnexesAandBareinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorg
17、anizationsofthefollowingcoun triesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Swe den,SwitzerlandandtheUnitedKingdom.EN126801:2003(E) 4 1Scope ThisEuropeanStandar
18、dspecifiestherequirementsfortheultrasonicexaminationofsteelcastings(withferritic structure)forgeneralpurposesandthemethodsfordetermininginternaldiscontinuitiesbythepulseechotech nique. ThisEuropeanStandardappliestotheultrasonicexaminationofsteelcastingswhichhaveusuallyreceivedagrain refiningheattrea
19、tmentandwhichhavewallthicknessesuptoandincluding600mm. Forgreaterwallthicknesses,specialagreementsapplywithrespecttotestprocedureandrecordinglevels. ThisEuropeanStandarddoesnotapplytoausteniticsteelsandjointwelds. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provis
20、ionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencest
21、helatesteditionofthe publicationreferredtoapplies(includingamendments). EN5831, NondestructivetestingUltrasonicexaminationPart1:Generalprinciples. EN5832, NondestructivetestingUltrasonicexaminationPart2:Sensitivityandrangesetting. EN5835, NondestructivetestingUltrasonicexaminationPart 5:Characteriza
22、tionandsizingofdiscon tinuities. EN12223, NondestructivetestingUltrasonicexaminationSpecificationforcalibrationblockNo.1. EN126681, NondestructivetestingCharacterizationandverificationofultrasonicexaminationequipment Part1:Instruments. EN126682, NondestructivetestingCharacterizationandverificationof
23、ultrasonicexaminationequipment Part2:Probes. EN126683,Nondestructive testing Characterization and verification of ultrasonic examination equipment Part3:Combinedequipment. EN27963, WeldsinsteelCalibrationblockNo.2forultrasonicexaminationofwelds(ISO7963:1985). 3 Termsanddefinitions Forthepurposesofth
24、isEuropeanStandard,thefollowingtermsanddefinitionsapply. NOTE OthertermsanddefinitionsusedinthisEuropeanStandardaregiveninEN5831,EN5832,EN5835and EN13304. 3.1 referencediscontinuityechosize smallestindicationtoberecordedduringtheassessmentphaseofanultrasonicexamination,usuallyexpressedas anequivalen
25、tflatbottomedholediameterEN126801:2003(E) 5 3.2 pointdiscontinuity discontinuity,thedimensionsofwhicharesmallerthanorequaltothesoundbeamwidth NOTE Dimensionsinthisstandardrelatetolength,widthand/ordimensioninthroughwalldirection. 3.3 complexdiscontinuity discontinuity,thedimensionsofwhicharelargerth
26、anthesoundbeamwidth NOTE Dimensionsinthisstandardrelatetolength,widthand/ordimensioninthroughwalldirection. 3.4 planardiscontinuity discontinuityhavingtwomeasurabledimensions 3.5 volumetricdiscontinuity discontinuityhavingthreemeasurabledimensions 3.6 specialrimzone outerrimzonepartwithspecialrequir
27、ements(fore.g.machinedsurfaces,higherstresses,sealingsurfaces) 3.7 productionwelding anyweldingcarriedoutduringmanufacturingbeforefinaldeliverytothepurchaser 3.7.1 jointwelding productionweldingusedtoassemblecomponentstogethertoobtainanintegralunit 3.7.2 finishingwelding productionweldingcarriedouti
28、nordertoensuretheagreedqualityofthecasting 4Requirements 4.1 Orderinformation Thefollowinginformationshallbeavailableatthetimeofenquiryandorder(seealsoEN5831): theareasofthecastingandthenumberorpercentageofcastingstowhichtheultrasonicexaminationrequire mentsapply(examinationvolume,extentofexaminatio
29、n); theseverityleveltobeappliedtothevariouszonesorareasofthecasting(acceptancecriteria); requirementsforawrittenexaminationprocedure; whetherthereareanyadditionalrequirementsfortheexaminationprocedure,seealso5.5.1.EN126801:2003(E) 6 4.2 Extentofexamination Thecastingshallbeexaminedsothattheagreedare
30、asaretotallycovered(insofarasthisispossiblefromthe shapeofthecasting)bytheuseofthebestapplicableexaminationtechnique. Forwallthicknessesgreaterthan600mm,agreementshallbemadebetweenthepartiesconcernedontheexami nationprocedureandalsoontherecordingandacceptancelevels. 4.3 Maximumpermissiblesizeofdisco
31、ntinuities 4.3.1 Limitsofacceptanceforplanardiscontinuitiesmainlyorientatedperpendiculartothesurface ThelimitsofacceptanceforplanardiscontinuitiesaregiveninFigure1. Indicationswithmeasurabledimensionsarenotpermissibleasseveritylevel1. Thelargestdimensioninthroughwalldirectionshallnotexceed10%ofwallt
32、hickness,exceptindicationswitha measurablelength 10mm.Suchindicationsshallnotexceedadimensioninthroughwalldirectionof25%ofwall thicknessor20mm. Thegreatestdistancebetweenindicationsascriterionforevaluationassingleindicationorindicationareaperpen dicularorlateraltothesurfaceshallbe10mm. Foranareawith
33、measurablelengthandnonmeasurabledimensioninthroughwalldirection,thisnonmeasurable dimensionshallbetakenas3mmandtheareabecalculated: A=3 L (1) where Aistheareaofindicationexpressedinsquaremillimetres; 3isthetakenwidthinmillimetres; Listhemeasurablelengthexpressedinmillimetres. 4.3.2 Limitsofacceptanc
34、eforvolumetricdiscontinuities ThelimitsofacceptanceforvolumetricdiscontinuitiesaregiveninTable1.Anydiscontinuityexceedingoneofthe criteriashallbeconsideredasunacceptable. 4.3.3 Maximumpermissiblediscontinuitiesinthecaseofradiographicexaminationofthecastingcarried outasasupplementtoultrasonicexaminat
35、ion Unlessotherwiseagreedbythetimeofenquiryandorder,when,afterconductingtheradiographicandtheultra sonicexaminationincombination,ithasbeendemonstratedthatadiscontinuityissituatedinthecorezone,this additionalinformationmakesthediscontinuityacceptableatonelevellesssevere,e.g.severitylevel3insteadof2 f
36、orradiographicexamination,seeEN15592. 4.4Personnel qualification Itisassumedthatultrasonicexaminationisperformedbyqualifiedandcapablepersonnel.Inordertoprovethis qualification,itisrecommendedtocertifypersonnelinaccordancewithEN473.EN126801:2003(E) 7 4.5 Wallsectionzones Thewallsectionshallbedividedi
37、ntozonesasshowninFigure2.Thesesectionsrelatetothedimensionsofthe castingreadyforassembly(finishmachined). 4.6 Severitylevels Ifthepurchaserspecifiesdifferentseveritylevelsindifferentareasofthesamecasting,alloftheseareasshallbe clearlyidentifiedonthepurchasersdrawingandshallinclude: allnecessarydimen
38、sionsforaccuratelocationofzones; thefullextentofallweldpreparationsandthethicknessofanyspecialrimzone. Severitylevel1isonlyappliedtoweldpreparationsandspecialrimzones. Unlessotherrequirementshavebeenagreedbythetimeofacceptanceoftheorder,forfinishingwelds,there quirementsfortheparentmetalshallapply.
39、5Examination 5.1Principles TheprinciplesofultrasonicexaminationgiveninEN5831,EN5832andEN5835shallapply. 5.2Material Thesuitabilityofmaterialforultrasonicexaminationisassessedbycomparisonwiththeechoheightofareference reflector(usuallythefirstbackwallecho)andthenoisesignal.Thisassessmentshallbecarried
40、outonselected castingareaswhicharerepresentativeofthesurfacefinishandofthetotalthicknessrange.Theassessmentareas shallhaveparallelsurfaces. ThereferenceechoheightaccordingtoTable2shallbeatleast6dBabovethenoisesignal. Iftheechoheightofthissmallestdetectableflatbottomedorequivalentsidedrilledholediame
41、terattheendofthe testrangetobeassessedislessthan6dBabovethegrasslevel,thentheultrasonictestabilityisreduced.Inthis case,theflatbottomedorsidedrilledholediameterwhichcanbedetectedwithasignalnoiseratioofatleast6dB shallbenotedinthetestreportandtheadditionalprocedureshallbeagreedbetweenthemanufacturera
42、ndthe purchaser. NOTE Forthedefinitionofanadequateflatbottomedholesize,thedistancegainsizesystem(DGS)oratestblockof identicalmaterial,heattreatmentconditionandsectionthicknesscontainingflatbottomedholeswithadiameteraccordingto Table2orequivalentsidedrilledholes,canbeused.Thefollowingformulaisusedfor
43、convertingtheflatbottomedholedi ameterintothesidedrilledholediameter: s D D = 2 FBH Q l 4 935 , 4 (2) where D Q isthesidedrilledholediameterinmillimetres; D FBH istheflatbottomedholediameterinmillimetres; l isthewavelengthinmillimetres;EN126801:2003(E) 8 s isthepathlengthinmillimetres. Theformulaisapplicablefor D Q 2 l and s 5 nearfieldlengthandisonlydefinedforsingleelementprobes. 5.3 Equipmentandcouplingmedium 5.3.1 Ultrasonicinstrument Theultrasonicinst
