【英文标准名称】:Informationtechnology-Notationofformatfordataelementvalues
【原文标准名称】:信息技术.数据元素值格式记法
【标准号】:ANSI/INCITS/ISO/IEC14957-2009
【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】:数据元素;数据处理;数据表示;定义;(数据)格式;信息交换;信息技术;标志;表示法
【英文主题词】:Dataelements;Dataprocessing;Datarepresentation;Definition;Definitions;Formats;Informationinterchange;Informationtechnology;Notation;Representations
【摘要】:Specifiesthenotationforstatingtheformat,i.e.thecharactertypesusedintherepresentationofdataelements,thelengthoftheserepresentationsandadditionalnotationsrelativetotherepresentationofnumericalfigures.Itdoesnotcovercontrolcharacters.
【中国标准分类号】:L72
【国际标准分类号】:35_040
【页数】:
【正文语种】:英语


【英文标准名称】:MeasurementofFluidFlowinPipesUsingOrifice,Nozzle,andVenturiDateofIssuance:8/15/2005
【原文标准名称】:用孔板、管接头和文杜利管测量管道中的液体流量
【标准号】:ASMEMFC-3M-2004
【标准状态】:现行
【国别】:美国
【发布日期】:2004-01-01
【实施或试行日期】:
【发布单位】:美国机械工程师协会(US-ASME)
【起草单位】:ASME
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Flowmeasurements;Flowmeasuringtechniques;Flowmeters;Methodsformeasuring;Metric;Nozzleflowmeters;Orificeflowmeters;Pipelines;Pipes;Venturimeters
【摘要】:ThisStandardspecifiesthegeometryandmethodofuse(installationandflowingconditions)fororificeplates,nozzles,andVenturitubeswhentheyareinsertedinaconduitrunningfull,todeterminetherateofthefluidflowing.Italsogivesnecessaryinformationforcalculatingflowrateanditsassociateduncertainty.Itappliesonlytopressuredifferencedevicesinwhichtheflowremainsturbulentandsubsonicthroughoutthemeasuringsectionissteadyorvariesonlyslowlywithtimeandthefluidisconsideredsingle-phased.Inaddition,theuncertaintiesaregivenintheappropriatesectionsofthisStandardforeachofthesedevices,withinthepipesizeandReynoldsnumberlimitswhicharespecified.Itdealswithdevicesforwhichsufficientcalibrationshavebeenmadetoenablethespecificationofcoherentsystemsofapplicationandtoenablecalculationstobemadewithcertainpredictablelimitsofuncertainty.Thedevicesintroducedintothepipearecalledprimarydevices.Thetermprimarydevicealsoincludesthepressuretapsandtheassociatedupstreamanddownstreampiping.Allotherinstrumentsordevicesrequiredforthemeasurementortransmissionofthedifferentialpressuresareknownassecondaryelements,andincombinationarereferredtoasthesecondarydevices.ThisStandardcoverstheprimarydevices;secondarydeviceswillbementionedonlyoccasionally.ThefollowingprimarydevicesarecoveredinthisStandard:(a)orificeplates,whichcanbeusedwiththefollowingarrangementsofpressuretaps:(1)flangepressuretaps,(2)DandD/2pressuretaps,(3)cornerpressuretaps.(b)nozzles:(1)ASMElongradiusnozzles.(c)Venturitubes:(1)classicalVenturitubes.ThisStandarddoesnotpipeorconduitsizesunder50mm{2in.}nominal.ThisStandarddoesnotapplytoASMEPerformanceTestCodemeasurements.TheStandardisapplicabletomeasurementofflowofanyfluid,(liquid,vapor,orgas).
【中国标准分类号】:A52
【国际标准分类号】:17_120_10
【页数】:92P.;A4
【正文语种】:英语