【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


【英文标准名称】:Lightadjustablebaseplatesforscaffolds;structuralrequirements,assessmentofload-bearingcapacityandinspection
【原文标准名称】:脚手架的轻型可调节底板.结构要求、承载能力的评估和检查
【标准号】:DIN4425-1990
【标准状态】:现行
【国别】:德国
【发布日期】:1990-11
【实施或试行日期】:1990-11-01
【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】:脚手架零件;防腐蚀;数学计算;脚手架;安全工程;建筑;作标记;规范(审批);设计;钢;定义;材料;脚手架搭设;安全;监督(认可);验证;额定值;荷载能力;轻;主轴;硬挺度;螺纹;设备安全
【英文主题词】:
【摘要】:Ligthadjustablebaseplatesforscaffoldsareusedtogetherwithbaseplatesforverticaladjustmentofstandardsatthebaseofascaffold.Inmostcasestheirload-bearingcapacityisdecisiveforthelimitationoftheload-bearingcapacityofthescaffold.Apartfromstructuralrequirementsthisstandardincludesregulationsfortheassessmentofload-bearingcapacityandtheinspection.
【中国标准分类号】:P96
【国际标准分类号】:7430
【页数】:6P;A4
【正文语种】:德语