Designation:E1158−14StandardGuideforMaterialSelectionandFabricationofReferenceBlocksforthePulsedLongitudinalWaveUltrasonicTestingofMetalandMetalAlloyProductionMaterial1ThisstandardisissuedunderthefixeddesignationE1158;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisguidecoversgeneralproceduresforthematerialselectionandfabricationofreferenceblocksmadeofmetalormetalalloysandintendedtobeusedfortheexaminationofthesameorsimilarproductionmaterialsbypulsedlongitudinalultrasonicwavesappliedperpendiculartothebeamentrysurface.Primaryemphasisisonsolidmaterialsbutsomeofthetechniquesdescribedmaybeusedformidwallexaminationofpipesandtubesofheavywallthickness.Near-surfaceresolu-tioninanymaterialdependsuponthecharacteristicsoftheinstrumentandsearchunitemployed.1.2Thisguidecoversthefabricationofreferenceblocksforusewitheithertheimmersionorthecontactmethodofultrasonicexamination.1.3Referenceblocksfabricatedinaccordancewiththisguidecanbeusedtodetermineproperultrasonicsystemoperation.Area-amplitudeanddistance-amplitudecurvescanalsobedeterminedwiththesereferenceblocks.1.4Thisguidedoesnotspecifyreferencereflectorsizesorproductrejectionlimits.Itdoesdescribetypicalindustryfabricationpracticesandcommonlyappliedtoleranceswheretheylendclaritytotheguide.Inallcasesofconflictbetweenthisguideandcustomerspecifications,thecustomerspecifica-tionshallprevail.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregula-torylimitationspriortouse.2.Ref...
