【英文标准名称】:StandardPracticeforUltrasonicExaminationoftheWeldZoneofWeldedPipeandTubing
【原文标准名称】:焊接管道焊接区域的超声波检验标准实施规程
【标准号】:ASTME273-2001(2005)
【标准状态】:现行
【国别】:
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E07.06
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:管;无损检验;超声波学
【英文主题词】:anglebeam;longitudinalweldedpipe;longitudinalweldedtubing;nondestructiveexamination;ultrasonicexamination
【摘要】:1.1Thispracticedescribesgeneralultrasonicexaminationproceduresforthedetectionofdiscontinuitiesintheweldandadjacentheataffectedzonesofweldedpipeandtubingbyscanningwithrelativemotionbetweenthesearchunitandpipeortube.Whencontactorunfocusedimmersionsearchunitsareemployed,thispracticeisintendedfortubularproductshavingspecifiedoutsidediameters2in.(50mm)andspecifiedwallthicknessesof1/8to11/16in.(3to27mm).Whenproperlyfocusedimmersionsearchunitsareemployed,thispracticemayalsobeappliedtomaterialofsmallerdiameterandthinnerwall.Note18212;Whencontactorunfocusedimmersionsearchunitsareused,precautionsshouldbeexercisedwhenexaminingpipesortubesnearthelowerspecifiedlimits.Certaincombinationsofsearchunitsize,frequency,thin-wallthicknesses,andsmalldiameterscouldcausegenerationofunwantedsoundwavesthatmayproduceerroneousexaminationresults.1.2Allsurfacesofmaterialtobeexaminedinaccordancewiththispracticeshallbecleanfromscale,dirt,burrs,slag,spatterorotherconditionsthatwouldinterferewiththeexaminationresults.Theconfigurationoftheweldmustbesuchthatinterferingsignalsarenotgeneratedbyreflectionsfromit.Treatmentoftheinnersurfaceandoutersurfaceweldbeadssuchastrimming("scarfing")orrollingisoftenrequiredtoremoveprotuberancesthatcouldresultinspuriousreflections.1.3Thispracticedoesnotestablishacceptancecriteria,theymustbespecifiedbytheusingparties.1.4Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIequivalentsareinparenthesesandmaybeapproximate.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:23_040_01
【页数】:4P.;A4
【正文语种】: