Designation:E1416−16aStandardPracticeforRadioscopicExaminationofWeldments1ThisstandardisissuedunderthefixeddesignationE1416;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversauniformprocedureforradio-scopicexaminationofweldments.Requirementsexpressedinthispracticeareintendedtocontrolthequalityoftheradio-scopicimagesandarenotintendedforcontrollingacceptabilityorqualityofwelds.1.2Thispracticeappliesonlytotheuseofequipmentforradioscopicexaminationinwhichtheimageisfinallypre-sentedonadisplayscreen(monitor)foroperatorevaluation.Theexaminationmayberecordedforlaterreview.Itdoesnotapplytofullyautomatedsystemswhereevaluationisautomati-callyperformedbycomputer.1.3Theradioscopicextent,thequalitylevel,andtheaccep-tancecriteriatobeappliedshallbespecifiedinthecontract,purchaseorder,productspecification,ordrawings.1.4Thispracticecanbeusedforthedetectionofdisconti-nuities.Thispracticealsofacilitatestheexaminationofaweldfromseveraldirections,suchasperpendiculartotheweldsurfaceandalongbothweldbevelangles.Theradioscopictechniquesdescribedinthispracticeprovideadequateassur-ancefordefectdetectability;however,itisrecognizedthat,forspecialapplications,specifictechniquesusingmorestringentrequirementsmaybeneededtoprovideadditionaldetectioncapability.Theuseofspecificradioscopictechniquesshallbeagreeduponbetweenpurchaserandsupplier.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection7.2.ReferencedDocuments2.1AST...
