ANSI/ASME MFC-5.1-2011 时差法超声波流量计测量暗管道中流量
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【英文标准名称】:MeasurementofLiquidFlowinClosedConduitsUsingTransitTimeUltrasonicFlowmeters
【原文标准名称】:时差法超声波流量计测量暗管道中流量
【标准号】:ANSI/ASMEMFC-5.1-2011
【标准状态】:现行
【国别】:美国
【发布日期】:2011
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:流量测量;流量测量技术;流量计;液体流量;测量方法;米制的;管道;管;超声波装置;超声波工程
【英文主题词】:Flowmeasurements;Flowmeasuringtechniques;Flowmeters;Liquidflow;Methodsformeasuring;Metric;Pipelines;Pipes;Ultrasonicdevices;Ultrasonicengineering
【摘要】:ThisStandardappliesonlytoultrasonicflowmetersthatbasetheiroperationonthemeasurementoftransittimeofacousticsignals.ThisStandardconcernsthevolumeflowratemeasurementofasinglephaseliquidwithsteadyfloworflowvaryingonlylowlywithtimeinacompletelyfilledclosedconduit.
【中国标准分类号】:A52
【国际标准分类号】:17_120_10
【页数】:
【正文语种】:英语
【英文标准名称】:StandardPracticeforExtractionofMedicalPlastics
【原文标准名称】:医学塑料制品萃取的标准实施规范
【标准号】:ASTMF619-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:F04.16
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:医学科学;萃取;医疗设备;塑料;工艺
【英文主题词】:biocompatibility;extraction;liquids;plastics;specimensize;
【摘要】:Theseextractionproceduresaretheinitialpartofseveraltestproceduresusedinthebiocompatibilityscreeningofplasticsusedinmedicaldevices.Thelimitationsoftheresultsobtainedfromthispracticeshouldberecognized.Thechoiceofextractionvehicle,durationofimmersion,andtemperatureofthetestisnecessarilyarbitrary.Thespecificationoftheseconditionsprovidesabasisforstandardizationandservesasaguidetoinvestigatorswishingtocomparetherelativeresistanceofvariousplasticstoextractionvehicles.Correlationoftestresultswiththeactualperformanceorserviceabilityofmaterialsisnecessarilydependentuponthesimilaritybetweenthetestingandend-useconditions(see12.1.2andNote4).Cautionshouldbeexercisedintheunderstandingandintentofthispracticeasfollows:5.4.1Noallowanceordistinctionismadeforvariablessuchasend-useapplicationanddurationofuse.DecisionsonselectionofteststobedoneshouldbemadebasedonPracticeF748.5.4.2Thispracticewasoriginallydesignedforusewithnonporous,solidmaterials.Itsapplicationforothermaterials,suchasthosethatareporous,orabsorptive,orresorptive,shouldbeconsideredwithcaution.Considerationshouldbegiventoalteringthespecifiedmaterialtoliquidratiotoallowadditionalliquidtofullyhydratethematerialandadditionalliquidorothermethodstofullysubmergethetestarticle.Additionalproceduresthatfullyremovetheextractliquidfromthetestarticle,suchaspressureorphysicallysqueezingthematerial,shouldalsobeconsideredasappropriate.Althoughnodefinitionsaregiveninthispracticeforthefollowingterms,suchitemsasextractionvehiclesurfacetensionatthespecifiedextractionconditionandplasticspecimenphysicalstructureshouldbetakenintoaccount.TestMethodsD543,D570,andD1239maybeusefulinprovidingsupplementalinformation.1.1Thispracticecoversmethodsofextractionofmedicalplasticsandmaybeapplicabletoothermaterials.Thispracticeidentifiesamethodforobtaining"extractliquid"foruseindeterminingthebiologicalresponseinpreclinicaltesting.Furthertestingofthe"extractliquid"isspecifiedinotherASTMstandards.Theextractmayundergochemicalanalysisaspartofthepreclinicalevaluationofthebiologicalresponse,andthematerialafterextractionmayalsobeexamined.1.2Thispracticemaybeusedfor,butisnotlimitedtothefollowingareas:partialevaluationofrawmaterials,auditingmaterialswithinthemanufacturingprocess,andtestingfinalproducts.Thispracticemayalsobeusedasarefereemethodforthemeasurementofextractablesinplasticsusedinmedicaldevices.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G33
【国际标准分类号】:11_120_01;83_080_01
【页数】:4P.;A4
【正文语种】:
【英文标准名称】:ELECTRONICTUBESWITHQUALITYCONFORMANCEPROCEDURESIMAGECONVERTERANDIMAGEINTENSIFIERTUBESPARTICULARREQUIREMENTS
【原文标准名称】:电子管质量检验.变像管和图像亮度放大器的特殊规定
【标准号】:NFC95-224-1975
【标准状态】:作废
【国别】:法国
【发布日期】:1975-11
【实施或试行日期】:1975-10-31
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:物理试验;电气试验;尺寸测量;电子管;试验条件;规范;定义;图像增强器;光电图像变换管;试验;光学试验
【英文主题词】:
【摘要】:
【中国标准分类号】:L38
【国际标准分类号】:
【页数】:35P;A4
【正文语种】:其他
