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【英文标准名称】:StandardTestMethodforClassificationofFilmSystemsforIndustrialRadiography
【原文标准名称】:工业放射摄影胶片系统分类用标准试验方法
【标准号】:ASTME1815-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E07.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:ASTMsystemclass;filmsystem;filmsystemclassification;gradient;gradient/noise;granularity;industrialradiographicfilm;speed;Classification(standards);Filmsystems;Industrialradiographicfilmprocessing/testing;Radiographicexaminat
【摘要】:Thistestmethodprovidesarelativemeansforclassificationoffilmsystemsusedforindustrialradiography.Thefilmsystemconsistsofthefilmandassociatedprocessingsystem(thetypeofprocessingandprocessingchemistry).Section9describesspecificparametersusedforthistestmethod.Ingeneral,theclassificationforhardX-rays,asdescribedinSection9,canbetransferredtootherradiationenergiesandmetallicscreentypes,aswellasscreenswithoutfilms.Theusageoffilmsystemparametersoutsidetheenergyrangesspecifiedmayresultinchangestoafilm/systemperformanceclassification.Thefilmperformanceisdescribedbycontrastandnoiseparameters.Thecontrastisrepresentedbygradientandthenoisebygranularity.Afilmsystemisassignedaparticularclassifitmeetstheminimumperformanceparameters:forGradientGatDx2013;D0=2.0andDx2013;D0=4.0,andgradient/noiseratioatDx2013;D0=2.0,andthemaximumperformanceparameter:granularityx03C3;DatD=2.0,andgradient/noiseratioatDx2013;D0=2.0.Thistestmethoddescribeshowtheparametersshallbemeasuredanddemonstrateshowaclassificationtablecanbeconstructed.Manufacturersofindustrialradiographicfilmsystemsanddeveloperchemistrywillbetheusersofthistestmethod.TheresultisaclassificationtableasshownbytheexamplegiveninTable2.Anothertablealsoincludesspeeddataforuserinformation.Usersofindustrialradiographicfilmsystemsmayalsoperformthetestsandmeasurementsoutlinedinthistestmethod,providedthattherequiredtestequipmentisusedandthemethodologyisfollowedstrictly.Thepublicationofclassesforindustrialradiographyfilmsystemswillenablespecifyingbodiesandcontractingpartiestoagreetoparticularsystemclasses,whicharecapableofprovidingknownimagequalities.See8.ISO11699x2013;1andEuropeanstandardEN584-1describethesamemethodforclassificationoffilmsystemsforindustrialradiography,butitsclassdefinitionsandnumberofclassesdonotalignexactlywiththistestmethod.Internationalusersofthesestandardsshouldbeawareofthesedifferencesfortheirparticularapplications.Note18212;ASTMresearchreportE07x2013;1005containsdocumentationoftechnicalmethodsusedduringthedevelopmentofthistestmethod.1.1Thistestmethodcoversaprocedurefordeterminationoftheperformanceoffilmsystemsusedforindustrialradiography.Thistestmethodestablishesminimumrequirementsthatcorrespondtosystemclasses.1.2Thistestmethodistobeusedonlyfordirectexposure-typefilmexposedwithleadintensifyingscreens.Theperformanceoffilmsexposedwithfluorescent(light-emitting)intensifyingscreenscannotbedeterminedaccuratelybythistestmethod.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associate......
【中国标准分类号】:G81
【国际标准分类号】:77_040_20
【页数】:8P.;A4
【正文语种】:英语