【英文标准名称】:StandardPracticeforElectromagnetic(Eddy-Current)ExaminationofSeamlessandWeldedTubularProducts,AusteniticStainlessSteelandSimilarAlloys
【原文标准名称】:无缝焊接管形产品、奥氏体不锈钢的类似合金的电磁(涡电流)检验的标准实施规程
【标准号】:ASTME426-1998(2007)
【标准状态】:现行
【国别】:美国
【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】:
【英文主题词】:alloy;austeniticchromium-nickelstainlesssteels;austeniticstainlesssteels;conductivity;discontinuities;eddy-current;electromagnetic;encirclingcoil;hallelement;non-magneticsteels;probecoil;seamlesstubularproducts;tubularp
【摘要】:Eddy-currentexaminationisanondestructivemethodoflocatingdiscontinuitiesinaproduct.Changesinelectromagneticresponsecausedbythepresenceofdiscontinuitiesaredetectedbythesensor,amplifiedandmodifiedinordertoactuateaudioorvisualindicatingdevices,orboth,oramechanicalmarker.Signalscanbecausedbyoutersurface,innersurface,orsubsurfacediscontinuities.Theeddy-currentexaminationissensitivetomanyfactorsthatoccurasaresultofprocessing(suchasvariationsinconductivity,chemicalcomposition,permeability,andgeometry)aswellasotherfactorsnotrelatedtothetubing.Thus,allreceivedindicationsarenotnecessarilyindicativeofdefectivetubing.1.1Thispracticecoversproceduresthatmaybefollowedforeddy-currentexaminationofseamlessandweldedtubularproductsmadeofstainlesssteelandsimilaralloyssuchasnickelalloys.Austeniticchromium-nickelstainlesssteels,whicharegenerallyconsideredtobenonmagnetic,arespecificallycoveredasdistinguishedfromthemartensiticandferriticstraightchromiumstainlesssteelswhicharemagnetic.1.2Thispracticeisintendedasaguideforeddy-currentexaminationofbothseamlessandweldedtubularproductsusingeitheranencirclingcoiloraprobe-coiltechnique.Coilsandprobesareavailablethatcanbeusedinsidethetubularproduct;however,theiruseisnotspecificallycoveredinthisdocument.Thistypeofexaminationisusuallyemployedonlytoexaminetubingwhichhasbeeninstalledsuchasinaheatexchanger.1.3Thispracticecoverstheexaminationoftubularproductsrangingindiameterfrom0.125to5in.(3.2to127.0mm)andwallthicknessesfrom0.005to0.250in.(0.127to6.4mm).1.4Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:
【页数】:4P.;A4
【正文语种】:英语