EN ISO 16827 2025..docx

ENISO16827June2025EUROPEANSTANDARDNORMEEUROPEENNEEuropaischenormICS19.100SupersedesENISO16827:2014EnglishVersionNon-destructivetesting-Ultrasonictesting-CharacterizationandsizingofdiscontinuitiesISO16827:2025Essaisnondestructifs-Controleparultrasons-Caracterisationetdimensionnementdesdiscontinuites(ISO16827:2025)ZerstorungsfreiePriifung-Ultraschallprufung-BeschreibungundGroEenbestimmungvonInhomogenitaten(ISO16827:2025)ThisEuropeanStandardwasapprovedbyCENon7June2025.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITEEUROPEENDENORMALISATIONEuropaischeskomiteefurnormungCEN-CENELECManagementCentre:RuedelaScience23,B-1040BrusselsRef.No.ENISO16827:2025E©2025CENAllrightsofexploitationinanyformandbyanymeansreservedworldwideforCENnationalMembers.EuropeanforewordThisdocument(ENISO16827:2025)hasbeenpreparedbyTechnicalCommitteeISO/TC135"Nondestructivetesting"incollaborationwithTechnicalCommitteeCEN/TC13811Non-destructivetesting11thesecretariatofwhichisheldbyAFNOR.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyDecember2025,andcon11ictingnationalstandardsshallbewithdrawnatthelatestbyDecember2025.Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.ThisdocumentsupersedesENISO16827:2014.Anyfeedbackandquestionsonthisdocumentshouldbedirectedtotheusers/nationalstandardsbody/nationalcommittee.AcompletelistingofthesebodiescanbefoundontheCENwebsite.AccordingtotheCEN-CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandtheUnitedKingdom.EndorsementnoticeThetextofISO16827:2025hasbeenapprovedbyCENasENISO16827:2025withoutanymodification.PageContentsForewordivIntroductionv1 Scope12 Normativereferences13 Termsanddefinitions14 Principlesofcharacterizationofdiscontinuities14.1 General14.2 Requirementsforsurfacecondition25 Pulse-echotechniques25.1 Locationofdiscontinuity25.2 Orientationofdiscontinuity35.3 Assessmentofmultipleindications35.4 Shapeofdiscontinuity45.4.1 Simpleclassification45.4.2 Detailedclassification45.5 Maximumechoheightofindication55.6 Sizeofdiscontinuity512345677777777General.5Maximumechoheighttechniques5Probemovementsizingtechniques6Selectionofsizingtechniques7Sizingtechniqueswithfocusingprobes8Useofmathematicalalgorithmsforsizing8Specialsizingtechniques86.2 Locationofdiscontinuity96.3 Evaluationofmultiplediscontinuities96.4 Reductionofsignalamplitude106.5 Sizeofdiscontinuity10Annex A (normative)Analysisofmultipleindications12Annex B (normative)Techniquesfortheclassificationofdiscontinuityshape14Annex C (normative)Sizingtechniqueusingthemaximumechoheight23Annex D (normative)Sizingtechniquesusingprobemovement25Annex E (informative)Iterativesizingtechnique37Annex F (informative)Mathematicalalgorithmsfortheestimationoftheactualsizeofadiscontinuity41Annex G (informative)Examplesofspecialsizingtechniques47Bibliography50ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.Theproceduresusedtodevelopthisdo