【英文标准名称】:Germanstandardmethodsfortheexaminationofwater,wastewaterandsludge-Jointlydeterminablesubstances(groupF)-Part17:Determinationofselectednitroaromaticcompoundsbygas-liquidchromatography(F17)
【原文标准名称】:德国对水,废水和淤泥的统一检验方法.可联合测定的材料组(F组).第17部分:用气－液相色谱分析仪测定选出的硝芳香族化合物
【标准号】:DIN38407-17-1999
【标准状态】:现行
【国别】:德国
【发布日期】:1999-02
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:水常规;饮用水;含量测定;试验;抽样方法;萃取分析法;分析;化学分析和试验;地下水;水质试验;套管;水;试验设备;芳烃;解释;检波器(回路);气相色谱法;萃取;烃类;物质;污水;校正;水化学;质量浓度;化合物;标准方法;地表水
【英文主题词】:
【摘要】:
【中国标准分类号】:P41
【国际标准分类号】:13_060_10
【页数】:15P;A4
【正文语种】:德语
【英文标准名称】:StandardPracticeforUltrasonicInspectionofAluminum-AlloyWroughtProductsforAerospaceApplications
【原文标准名称】:航空设备用铝合金锻制品的超声波检验的标准实施规程
【标准号】:ASTMB594-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:B07.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:航空航天
【英文主题词】:aerospace;aluminum-alloywroughtproducts;ultrasonicinspection;Aerospaceapplications;Aluminumalloys--ultrasonicinspection;Ultrasonictesting--metals/alloys
【摘要】:Anumberoffactorssuchastheconditionoftheentryandbacksurfacesoftheinspectedpart,theinclinationoftheultrasonicbeamwithrespecttotheentrysurface,andvariationsintheperformancecharacteristicsofthetestsystemmaycausesignificantdifferencesinamplitudesofdiscontinuityindicationsandbackreflections.Thesefactorscanseriouslyimpairthereliabilityandthequantitativevalueoftheultrasonictestoutlinedinthispractice.Accurateevaluationsofdiscontinuitysizearealsosignificantlyaffectedbyvariationsinsearchunitcharacteristicsandbyirregularitiesindiscontinuitysurfaceswhichcaninfluencereflectivity.Forthesereasons,thediscontinuitysizesthatmaybeimpliedbytheultrasoniccomparisonsoutlinedinthispracticemustberegardedasx201C;apparentx201D;orx201C;estimatedx201D;inrecognitionofthelimitedquantitativevalueofthemeasurement.Becausenumerousinteractingvariablesinatestsystemcanadverselyinfluencetheresultsofanultrasonicinspection,theactualquantitativeeffectsofdetecteddiscontinuitiesuponthemechanicalpropertiesoftheinspectedproductaredifficulttoestablish.Althoughthispracticeprovidesareliablecontrolofproductqualityduringmanufacture,itisnotapplicableasanexclusiveindicatoroftheultimatequalityandperformanceofcomponentsfabricatedfromtheinspectedproductscoveredbythispractice.1.1Thispracticecoverstherequirementsforpulse-echoultrasonicinspectionandincludescriteriausedtodefineapplicablequalitylevelsofaluminum-alloywroughtproductsforaerospaceapplicationswhenperformanceoftheultrasonictestbytheproducerisspecified,orwhenultrasonicinspectionisperformedbythepurchaseruponreceipt.1.2Thispracticeisnotapplicableifplasticdeformationisintroducedintothematerialafterdelivery.1.3Theultrasonictestdescribedinthispracticeisemployedtodetectinternaldiscontinuitiesorientedinadirectionparallelto,ornearlyparallelto,thesurfaceoftheproduct.Thetestisperformedeitherbytheimmersionmethodorthecontactmethodusingpulsedlongitudinalwaveswhicharetransmittedandreceivedbyasearchunitcontainingeitherasinglecrystaloracombinationofelectricallyinterconnectedmultiplecrystals.Ultrasonictestsemployingeitherthethrough-transmissionortheangle-beamtechniquesarenotincluded.Note18212;Ultrasonictestsemployingangle-beamtechniquesrequirespecialreferenceblocks,searchunits,andscanningproceduresandaresubjecttonegotiationbetweenthepurchaserandthesellerwhensuchtestsarerequiredbythecontractorpurchaseorder.1.4Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitswhichareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H26
【国际标准分类号】:49_025_20
【页数】:10P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 熔模铸造涂料比重测定方法（容量法） |
| 中标分类： |
机械 >>
加工工艺 >>
铸造 |
| 替代情况： | 被HB 5351.3-2004代替 |
| 发布日期： | 1986-03-11 |
| 实施日期： | 1986-11-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2004-12-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 机械 加工工艺 铸造