ut工藝規(guī)程

1、NJBSTCo.Ltd.QCD013Rev.:0Page:1of12Title:ULTRASONICEXAMINATIONPROCEDUREULTRASONICEXAMINATIONPROCEDURE超聲波檢驗(yàn)工藝規(guī)程CONTROLLED在控本□UNCONTROLLED非在控本□COPYNO副本編號(hào)：PREPAREDBY編制：DATE日期：REVIEWEDBY審核：DATE日期：APPROVEDBY批準(zhǔn)：DATE日期：NJBSTCo.L

2、td.QCD013Rev.:0Page:3of12Title:ULTRASONICEXAMINATIONPROCEDURE1.SCOPEOFAPPLICATIONThisprocedureiscompiledinaccdancewiththerequirementsofASMECodeSectionVSectionⅧDivision1.1.2Inaccdancewiththisprocedureapulseechotypeofultra

3、sonicinstrumentshallbeusedfCodeproductexamination.Singleprobeanglebeamscanningshallbetheprincipalmethodifnecessarystraightbeamscanningmayalsobeused.1.3Thisprocedureisapplicablefultrasonicexaminationofbuttweldedfullperate

4、djointinwrought(rolleddrawnfgedextruded)materialwiththicknessequaltogreaterthan516in.(8mm)detectinglocatingevaluatingthereflectsfromtheweldmetalheataffectedzonebasemetaladjacenttheweld.1.4Ultrasonicexaminationofsinglesid

5、eweldedpartialperatedweldsausteniticsteelweldsarenotconsideredtobewithinthescopeofthisprocedure.1.5Unlessotherprocedurehasbeenapprovedacceptedthatmayspecifyparticularrequirementsultrasonicexaminationrelatingtomethodevalu

6、ationdetailedtechniquerequirementshallbeinaccdancewiththisprocedure.2.NDEPERSONNEL2.1NDEpersonnelshallbequalifiedcertifiedaccdingtoNJBST’SWrittenPracticeQCD011basedonSNT–TCIA(CurrentCodeAcceptedEdition).3.GENERALEXAMINAT

7、IONREQUIREMENTS3.1ExaminationcoverageThevolumeshallbeexaminedbymovingthesearchunitovertheexaminationsurfacesoastoscantheentireexaminationvolume.Eachpassofthesearchunitshalloverlapaminimumof10%ofthetransducer(piezoelectri

8、celement)dimensionperpendiculartothedirectionofthescan.3.2SpeedofSearchUnitMovementsThespeedofsearchunitmovementfexaminationshallnotexceed6in.sec(150mmsec.)3.3RecdingLevelAllreflectionsfromuncrectedareashavingresponsesth

9、atexceed50%ofreferencelevelshallberecded.Thisrecdshalllocateeachareatheresponselevelthedimensionsthedepthbelowthesurfacetheclassification.4.ULTRASONICINSTRUMENTSEARCHUNITPARAMETERS4.1UltrasonicInstrumentApulseechotypeofu

10、ltrasonicinstrumentshallbeused.Thefollowinginstrumentsarerecommendedinexamination.1.適用范圍1.1本規(guī)程按ASME第V卷和第Ⅷ第1分冊(cè)要求編制。1.2按規(guī)程對(duì)規(guī)范產(chǎn)品的檢查用脈沖反射式超聲波探傷儀。以單斜探頭掃查為主要方法，必要時(shí)可輔以直探頭掃查。1.3本規(guī)程適用于板厚≥8mm鋼制壓力容器全焊透對(duì)接焊縫的超聲檢查(包括焊縫金屬和熱影響區(qū))。1.4本規(guī)程不

11、適用于單面焊部分焊透焊縫的檢查，也不適用于奧氏體鋼焊縫的的檢查。1.5除非其他程序經(jīng)批準(zhǔn)、有關(guān)具體要求經(jīng)認(rèn)可，UT有關(guān)方法、評(píng)定、要求應(yīng)按本規(guī)程。2.無(wú)損探傷人員2.1無(wú)損探傷人員應(yīng)按本公司根據(jù)SNTTCIA(現(xiàn)行版)制定的“NDE人員培訓(xùn)、考試、資格鑒定和認(rèn)證的實(shí)施細(xì)則”進(jìn)行資格鑒定和認(rèn)證。3.一般探傷要求3.1探測(cè)范圍應(yīng)通過(guò)探頭在探測(cè)面的移動(dòng)，使焊縫全體積均受超聲束掃查。探頭的掃查路徑應(yīng)至少重疊探頭橫向?qū)挾鹊?0%3.2探頭移動(dòng)速度