【英文标准名称】:StandardPracticeforElectromagnetic(Eddy-Current)ExaminationofTypeF-ContinuouslyWelded(CW)FerromagneticPipeandTubingAbovetheCurieTemperature
【原文标准名称】:在居里温度以上的F型连续焊接亚锰铁管的电磁(涡流)检验
【标准号】:ASTME1033-1998(2004)e1
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:E07.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:试验;涡流试验;铁磁的;管;无损检验;温度;金属
【英文主题词】:curietemperature;eddy-current;electromagnetic;NDT;nondestructivetesting
【摘要】:Thepurposeofthispracticeistooutlineaprocedureforthein-lineeddy-currentexaminationofhotCWpipeforthedetectionofmajorimperfectionsandrepetitivediscontinuities.Amajoradvantageofin-lineeddy-currentexaminationofferromagneticCWpipeabovetheCurietemperatureliesintheenhancedsignal-to-noiseratioanddepthofpenetrationobtainedwithouttheuseofmagneticsaturation.Theeddy-currentmethodiscapableofdetectingandlocatingweldimperfectionscommonlyreferredtoasopenwelds,cavewelds,blackspots(weldinclusions),andpartialwelds(incompletepenetration).Inaddition,itwilldetectpipe-wallimperfectionssuchasslivers,laps,andringwelds(endwelds).Therelativeseverityoftheimperfectionsmaybeindicatedbyeddy-currentsignalamplitudeorphase,orboth.Analarmlevelmaybeselectedthatutilizessignalamplitudeorphase,orboth,forautomaticrecordingormarking,orboth.Becausetheresponsesfromnaturaldiscontinuitiesmayvarysignificantlyfromthosefromartificialdiscontinuities,caremustbeexercisedinestablishingtestsensitivityandacceptancecriteria.1.1Thispracticecoversaprocedureforin-line,eddy-currentexaminationofcontinuouslywelded(CW)ferromagneticpipeandtubingattemperaturesabovetheCurietemperature(approximately1400F[760C],wherethepipeissubstantiallynonmagneticoraustenitic.1.2Thispracticeisintendedforuseontubularproductshavingnominaldiametersof1/2in.[12.7mm]to4in.[101.6mm].Thesetechniquesmaybeusedforlarger-orsmaller-diameterpipeandtubingasspecifiedbytheusingparties.1.3Thispracticeisspecificallyapplicabletoeddy-currentexaminationusingencirclingcoils,orprobecoils.1.4Thispracticedoesnotestablishacceptancecriteria.Theymustbeestablishedbytheusingparties.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.TheSIunitsinbracketsmaybeapproximate.Thisstandarddoesnotpurporttoaddressthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】: