Designation:E2906/E2906M−13StandardPracticeforAcousticPulseReflectometryExaminationofTubeBundles1ThisstandardisissuedunderthefixeddesignationE2906/E2906M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThispracticedescribesuseofAcousticPulseReflecto-metry(APR)technologyforexaminationoftheinternalsurfaceoftypicaltubebundlesfoundinheatexchangers,boilers,tubularairheatersandreactors,duringshutdownperiods.1.2ThepurposeofAPRexaminationistodetect,locateandidentifyflawssuchasthrough-wallholes,IDwalllossduetopittingand/orerosionaswellasfullorpartialtubeblockages.APRmaynotbeeffectiveindetectingcrackswithtightboundaries.1.3APRtechnologyutilizesgenerationofsoundwavesthroughtheairintheexaminedtube,thendetectingreflectionscreatedbydiscontinuitiesand/orblockages.Analysisoftheinitialphase(positiveornegative)andtheshapeofthereflectedacousticwaveareusedtoidentifythetypeofflawcausingthereflection.1.4Whenpropermethodsofsignalanddataanalysisaredeveloped,APRtechnologycanbeappliedforsizingofflaw/blockageindications.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandards.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E543SpecificationforAgenciesPerformingNondestructiveTestingE1316TerminologyforNondestructiveExaminations2.2OtherDocuments:SNT-TC-1ARecommendedPracticeforNondestructiveTestingPersonnelQualificationandCertification3ANSI/A...
