【英文标准名称】:StandardPracticeforEddy-CurrentExaminationofSteelTubularProductsUsingMagneticSaturation
【原文标准名称】:用磁饱和法做管状钢产品涡流检验的标准实施规范
【标准号】:ASTME309-1995(2006)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:无损检验;钢;金属;涡流试验;试验;管
【英文主题词】:discontinuity;encirclingcoil;ferromagneticpipe;ferromagnetictubing;magneticsaturationsystem;magnetizingfieldstrength;probecoil;tube;tubularproduct
【摘要】:Thepurposeofthispracticeistooutlineaprocedureforthedetectionandlocationofdiscontinuitiessuchaspits,voids,inclusions,cracks,orabruptdimensionalvariationsinferromagnetictubingusingtheelectromagnetic(eddy-current)method.Furthermore,therelativeseverityofadiscontinuitymaybeindicated,andarejectionlevelmaybesetwithrespecttothemagnitudeoftheindication.Theresponsefromnaturaldiscontinuitiescanbesignificantlydifferentthanthatfromartificialdiscontinuitiessuchasdrilledholesornotches.Forthisreason,sufficientworkshouldbedonetoestablishthesensitivitylevelandset-uprequiredtodetectnaturaldiscontinuitiesofconsequencetotheenduseoftheproduct.Eddy-currentexaminationsystemsaregenerallynotsensitivetodiscontinuitiesadjacenttotheendsofthetube.Theextentoftheendeffectregioncanbedeterminedinaccordancewith8.6.1.1Thispracticecoversaprocedureforapplyingtheeddy-currentmethodtodetectdiscontinuitiesinferromagneticpipeandtubing(Note0)wherethearticlebeingexaminedisrenderedsubstantiallynon-magneticbytheapplicationofaconcentrated,strongmagneticfieldintheregionadjacenttotheexaminingcoil.Forconvenience,thetermtubeortubularproductwillhereafterbeusedtorefertobothpipeandtubing.1.2Theprocedureisspecificallyapplicabletoeddy-currentexaminationmethodsusinganencircling-coilassembly.However,eddy-currenttechniquesthatemployeitherfixedorrotatingprobe-coilassembliesmaybeusedtoeitherenhancediscontinuitysensitivityonthelargediametertubularproductsortomaximizetheresponsereceivedfromaparticulartypeofdiscontinuity.1.3Thispracticeisintendedforuseontubularproductshavingoutsidediametersfromapproximately1/4to10in.(6.35to254.0mm).Thesetechniqueshavebeenusedforsmallerandlargersizeshowever,andmaybespecifieduponcontractualagreementbetweenthepurchaserandthesupplier.
【中国标准分类号】:H26
【国际标准分类号】:23_040_10;77_140_75
【页数】:5P.;A4
【正文语种】: