GB 113451989 钢焊缝手工超声波探伤方法和探伤结果分级en.docx

GB 113451989 钢焊缝手工超声波探伤方法和探伤结果分级en.docx

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GB113451989钢焊缝手工超声波探伤方法和探伤结果分级en

UDC621.790.05:

620.178.6

H24

NATIONALSTANDARDOF

THEPEOPLE’SREPUBLICOFCHINA

中华人民共和国国家标准

GB/T11345-1989

MethodforManualUltrasonicTestingandClassificationofTestingResultsforFerriticSteelWelds

钢焊缝手工超声波探伤方法和探伤结果分析

IssuedonMay8,1989ImplementedonJanuary1,1990

IssuedbyStateBureauofTechnicalSupervision

Content

1.Subjectcontentandscopeofapplication4

2.NormativeReferences4

3.Terms4

3.1SimplifyingtheHorizontalDistancel’4

3.2Defectindicationlength△l4

3.3Widthoftheprobeheadinterface（W）4

3.4Longitudinaldefect4

3.5Transversedirectiondefect4

3.6Geometriccriticalangleβ’5

3.7ParallelScan5

3.8Obliqueparallelscan5

3.9Defectdetectionsection5

3.10ReferenceLineofTandem5

3.11Referenceline5

3.12Tandemscansoftransversesquareness5

4.TestPersonnel6

5.Defectoscope,probeheadand/orsystemperformance7

5.1Defectoscope7

5.2Probehead7

5.3Systemperformance7

5.3.1Allowanceofsensitivityratio7

5.3.2Distantfielddiscrimination7

5.4Defectoscope,probeheadand/orsystemperformanceandperiodicinspection8

6.TestSpecimen8

7.InspectionClasses9

7.1Ratingofinspectionclasses9

7.2Scopeoftheinspectionclasses9

8.InspectionPreparation9

8.1Detectionsurface9

8.2Inspectionfrequency11

8.3Probeheadangle12

8.4Couplant12

8.5Inspectionofparentmetal12

9.Regulation,CalibrationandInspectionofInstrument.12

9.1Regulationofthebaselinescan.12

9.2Drawingofthedistanceamplitudecurve（DAC）13

9.3Inspectionforregulationofinstrument15

10.InitialInspection15

10.1Generalrequirements15

10.2Inspectionoftheslabbuttweld16

10.3Inspectionofthebuttweldofcurvedsurfaceworkpieces17

10.4Inspectionofotherconstructionjoints18

10.4.1Generalprinciples18

10.4.2T-joint18

10.4.3Anglejoint19

10.4.4Filletweldoftubebase20

10.4.5Specificationofstraightbeamprobeinspection22

11SpecifiedInspections22

11.1Generalrequirements22

11.2Determinationofthemaximumreflectedwaveamplitude22

11.3Determinationoflocationparameter22

11.4Determinationoftheparameterofdimension23

12.EvaluationofDefect24

13ClassificationofInspectionResults24

14.RecordandReport25

AnnexA（Supplementary）ShapeandDimensionofStandardTestBlock27

AnnexD（Supplementary）PlottingofDistance-AmplitudeCurve（DAC）32

AnnexE（Supplementary）DeterminationoftheAcousticEnergyTransmissionLossDifference34

AnnexF（Informative）ReportandRecordofWeldUltrasonicDetection37

MethodforManualUltrasonicTestingandClassificationofTestingResultsforFerriticSteelWelds

钢焊缝手工超声波探伤方法和探伤结果分析

GB/T11345-1989

1.SubjectContentandApplicationScope

Thisstandardspecifiesgeneralmethodofinspectionofdefectsinweldand/orheat-affectedzone,methodsfordeterminationofdefectposition,dimensionandevaluation,aswellasratingmethodofdetectionresult.

Thisstandardisapplicabletoimpulsereflectionmethodmanualultrasonicinspectionofferritesteelwhosebasemetalthicknessisnotlessthan8mmincompletepenetrationandfusioninbuttweld

Thisstandardisnotapplicabletocaststeeland/orausteniticstainlesssteelweldedjoint,buttweldofsteeltubewiththeexternaldiametersmallerthan159mm;filletweldoftubebasewithinternaldiameterlessthanorequalto200mm,and/orlongitudinalweldwithexternaldiameterofthetubesmallerthan250mmandinternalandexternaldiameterratiosmallerthan80%.

2.NormativeReferences

ZBY344NamingMethodofProbeHeadsUsedforUltrasonicInspection

ZBY231PerformanceTestingMethodofProbeHeadsUsedforUltrasonicInspection

ZBY232TechnicalConditionsforNo.1ReferenceBlockUsedinUltrasonicInspection

ZBJ04001TestingMethodofOperatingCharacteristicsofA-typeImpulseReflectionUltrasonicInspectionSystem

3.Terms

3.1SimplifyingtheHorizontalDistancel’

HorizontaldistancefromtheleadingedgeofprobeheadtodetectionsurfaceL.

3.2Defectindicationlength△l

Thedefectlengthmeasuredbymovingtheprobeheadasrequiredintheultrasonicinspectionofweldedjoint.

3.3Widthoftheprobeheadinterface（W）

Forcircumferentialseaminspection,itreferstoprobeheadwidth;forlongitudinalseaminspection,itreferstoprobeheadlength.SeeFigure1.

3.4Longitudinaldefect

Basically,itparallelswiththedefectoftheweldedjointtrend.

3.5Transversedirectiondefect

Basically,itisperpendiculartotheweldedjointtrend.

3.6Geometriccriticalangleβ’

Angleofrefractionwhentherefractionacousticbeamaxiallineandtheinnerwallaretangentialduringtheinspectionofcylindricalworkpieces.

3.7ParallelScan

Duringthedefectdetectionofobliqueangle,puttheprobeheadonthesurfacesofweldedjointand/orheat-affectedzonetomaketheacousticbeampointtoweldedjointdirectionandscanbymovingalongtheweldedjointdirection.

Figure1WidthoftheProbeHeadInterface

3.8Obliqueparallelscan

Duringthedefectdetectionofobliqueangle,probeheadandaxisofaweldshallbemadeintoanangleofcertaindegree,andscanbymovinginthedirectionparallelingtheweldedjointdirection.

3.9Defectdetectionsection

Duringthetandemscanfordefectdetection,asthesectionofdefectdetectionobject,generallyfusionfaceistakenasthedefectdetectionsection.SeeFigure2.

3.10ReferenceLineofTandem

Duringthetandemscan,asthereferencelinemovingfromthetwoprobeheads,oneofwhichisdrawnandtheotherislaunched,generally,itissetinaposition0.5spanfromthedefectdetectionsection.SeeFigure2.

3.11Referenceline

Thepositionfordefectdetectionsectionhasbeencoveredafterwelding.Thereforebeforethewelding,amarkinglineshallbedrawnoutatcertaindistanceawayfromtheweldedjointgroove.Thislineisreferenceline,whichwillbetakenasthereferenceforthedeterminationoftandemreferenceline.SeeFigure3.

3.12Tandemscansoftransversesquareness

Launchanddrawasetofprobeheads.Makethedistanceofincidentpointsandtheweldedjointequaltoeachother.Andthenscan.SeeFigure4.

Figure2Figurefordefectdetectionsectionand/ortandemreferenceline

Figure3Referenceline

Figure4Transversesquarenessscanandverticalsquarenessscan

4.TestPersonnel

4.1Testpersonnelforweldedjointdefectdetectionmustgraspthebasicultrasonicdefectdetectingtechnology,beexperiencedinweldedjointultrasonicdefectdetectingandgraspbasicknowledgeofmaterialandwelding.

4.2Weldedjointultrasonicinspectionpersonnelshallbetrainedandcheckedcriticallyaccordingtorelatedregulationsortechnicalconditions.Eachofthemshallholdqualificationcertificateissuedbycorrespondinginspectionorganizationsandtakeoncorrespondingtasksofinspection.

Note:

Generalweldinginspectiondisciplineinspectionitemisdividedintoboardbuttweld;pipecastingbuttweld;tubebasefilletweld;nodeweldedjoint.

4.3VisionofUltrasonicInspectionPersonnelshallbeexaminedannually.Thecorrectedvisionshallbenolowerthan1.0.

5.Defectoscope,probeheadand/orsystemperformance

5.1Defectoscope

UseTypeAdisplayimpulsereflectiondefectoscope.Itsworkingfrequencyscopeshallbewithin1-5MHz.Defectoscopeshallbeequippedwithattenuatororgaincontroller.Theaccuracyshallbeanyneighboring12dB.Errorshallbewithin±1dB.Thegapbetweeneachtwostepsshallbenogreaterthan2dB.Theoverallregulationcapacityshallbegreaterthan60dB.Horizontallinearityerrorshallbenogreaterthan1%.Verticallinearityerrorshallbenogreaterthan5%.

5.2Probehead

5.2.1ProbeheadshallbelabeledincompliancewithregulationsofZBY344standard

5.2.2Effectiveareaofcrystalwafershallbenogreaterthan500mm2,andanysidelengthshallbenogreaterthan25mm.

5.2.3Horizontaldeviationangleoftheacousticbeamaxiallineshallbenogreaterthan2°.

5.2.4Deviationofthemainacousticbeamofprobeheadinverticaldirectionshallhavenoevidentsplit-blip.TestingmethodseeZBY2310

5.2.5NominalrefractionangleofanglebeamprobeQare450,600,700orkvalueare1.0,1.5,2.0,and2.5.Deviationofthemeasuredvalueandnominalvalueoftherefractionangleshallbenogreaterthan20（kvaluedeviationshallbenogreaterthan±0.1）.Deviationfortheleadingedgespaceshallbenogreaterthan1mm.Ifconstrainedbygeometricshapeofworkpiecesorcurvatureoffaceofdefectdetection,otherprobeheadsofsmallanglesmayalsobeadopted.

5.2.6Whenitisprovedthatbothaccuracyandreliabilityofthedetectionresultcanbeimproved,orproblemscanbesolvedandtheaccuracyofresultcanbeensured,itisrecommendedtoadoptspecialtypeoffocusingprobeheads.

5.3Systemperformance

5.3.1Allowanceofsensitivityratio

Effectivesensitivityofthesystemmustbegreaterthantheevaluatedsensitivitybyover10dB

5.3.2Distantfielddiscrimination

a.Straightbeamprobe:

X≥30dB;

b.anglebeamprobe:

Z≥6dB.

5.4Defectoscope,probeheadand/orsystemperformanceandperiodicinspection

5.4.1Otherthanallowanceofsensitivityratio,defectoscope,probeheadand/orsystemperformanceshallallbetestedincompliancetotheregulationsofZBJ04001.

5.4.2Horizontallinearityandverticallinearityofdefectoscopeshallbecheckedatitsfirstserviceaswellaseverythreemonths.

5.4.3Anglebeamprobeand/orsystemperformancemustbeinspectedonceatthetimespecifiedinTable1.

Table1Inspectionintervalforanglebeamprobeand/orsystemperformance

Inspection