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【英文标准名称】:Measurementoffluidflowinclosedconduits-Velocity-areamethodsofflowmeasurementinswirlingorasymmetricflowconditionsincircularductsbymeansofcurrent-metersorPitotstatictubes
【原文标准名称】:封闭管道中流量的测量.使用流量计或皮托静压管测量圆管中涡流或不对称流动条件下流量用速度面积法
【标准号】:ISO7194-2008
【标准状态】:现行
【国别】:国际
【发布日期】:2008-07-15
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC30
【标准类型】:()
【标准水平】:()
【中文主题词】:流量;流量测量;流量计;液体流量;测量仪器;管;皮托管;管道;速度测量
【英文主题词】:Flow;Flowmeasurement;Flowmeters;Liquidflow;Measuringinstruments;Pipes;Pitottubes;Tubes;Velocitymeasurement
【摘要】:ThisInternationalStandardspecifiesvelocity-areamethodsformeasuringflowinswirlingorasymmetricflowconditionsincircularductsbymeansofcurrent-metersorPitotstatictubes.Itspecifiesthemeasurementsrequired,theprecautionstobetaken,thecorrectionstoapply,anddescribestheadditionaluncertaintieswhichareintroducedwhenameasurementinasymmetricorswirlingflowhastobemade.Onlyflowswithanegligibleradialcomponentareconsidered,however.Furthermore,itisnotpossibletomakeameasurementinaccordancewiththisInternationalStandardif,atanypointinthemeasuringcross-section,thelocalvelocitymakesanangleofgreaterthan40~withtheaxisoftheduct,orwheretheindexofasymmetryY(definedinAnnexF)isgreaterthan0,15.ThisInternationalStandarddealsonlywithinstrumentsformeasuringlocalvelocityasdefinedinISO3354andISO3966.IfPitotstatictubesareused,thisInternationalStandardappliesonlytoflowswheretheMachnumbercorrespondingtolocalvelocitiesdoesnotexceed0,25.
【中国标准分类号】:A50
【国际标准分类号】:17_120_10
【页数】:33P.;A4
【正文语种】:英语