Designation:A388/A388M−16aUsedinUSNRC-RDTstandardsStandardPracticeforUltrasonicExaminationofSteelForgings1ThisstandardisissuedunderthefixeddesignationA388/A388M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thispractice2coverstheexaminationproceduresforthecontact,pulse-echoultrasonicexaminationofsteelforgingsbythestraightandangle-beamtechniques.ThestraightbeamtechniquesincludeutilizationoftheDGS(DistanceGain-Size)method.SeeAppendixX3.1.2Thispracticeistobeusedwhenevertheinquiry,contract,order,orspecificationstatesthatforgingsaretobesubjecttoultrasonicexaminationinaccordancewithPracticeA388/A388M.1.3Supplementaryrequirementsofanoptionalnatureareprovidedforuseattheoptionofthepurchaser.Thesupple-mentaryrequirementsshallapplyonlywhenspecifiedindi-viduallybythepurchaserinthepurchaseorderorcontract.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Thisspecificationandtheapplicablematerialspecifica-tionsareexpressedinbothinch-poundunitsandSIunits.However,unlesstheorderspecifiestheapplicable“M”speci-ficationdesignation[SIunits],thematerialshallbefurnishedtoinch-poundunits.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3A469/A469MSpecificationforVacuum-TreatedSteelForg-ingsforGeneratorRotorsA745/A745MPracticeforUltrasonicExaminationofAus-teniticSteelForgingsA788/A788MSpecificationforSteelForgings,GeneralRe-q...
