水力發(fā)電廠水力機(jī)械輔助系統(tǒng)流量監(jiān)視測(cè)量技術(shù)規(guī)程（NB／T 10144-2019）英文版

ICS27.140P59EnergySectorStandardofthePeople’sRepublicofChina中華人民共和國(guó)能源行業(yè)標(biāo)準(zhǔn)PNB/T10144-2019TechnicalSpecificationforFlowMonitoringandMeasuringofHydraulic-MechanicalAuxiliarySysteminHydroelectricPowerPlants水力發(fā)電廠水力機(jī)械輔助系統(tǒng)流量監(jiān)視測(cè)量技術(shù)規(guī)程IssuedonJune4,2019ImplementedonOctober1,2019IssuedbyNationalEnergyAdministrationofthePeople’sRepublicofChinaLayoutandInstallationRequirementsofPipes6.0.1Theflowcomponentsshouldbemountedinthepositionfacilitatingforobservationandoperation.6.0.2Theinstallationpositionofflowcomponentsshouldavoidhigh-intensitymagneticfieldorstrongvibration.6.0.3Forthepipeswithaccurateflowmeasurementrequirements,straightinletandoutletsectionsshouldbeplacedinfrontofandbehindflowcomponents.Thelengthofstraightsectionsshouldmeetfollowingrequirements:1Fortheelectromagneticflowmeter,thelengthofinletsectionshouldnotbelessthan5timesthepipediameter,andthelengthofoutletsectionnotbelessthan3timesthepipediameter.2Forthemechanicalflowmeter,thelengthofinletsectionshouldnotbelessthan5timesthepipediameter,andlengthofoutletsectionnotbelessthan3timesofpipediameter.3Fortheflowswitch,thelengthofinletsectionshouldnotbelessthan3timesthepipediameter,andthelengthofoutletsectionnotbelessthan2timesthepipediameter.6.0.4Theplug-inelectromagneticflowmetercanbemountedtopipewithadiameterofDN25toDN80throughaspecificsocket,andtopipewithadiameterofDN100orabovethroughapipefitting.6.0.5Wheretheflowcomponentismountedvertically,theflowinthepipeshouldbeinupwarddirection.6.0.6Forahorizontalpipe,theplug-inflowcomponentsshouldbemountedintwosidesofpipeswithin45°alongthehorizontalaxis.Theinsertiondepthofelectromagneticflowmeterprobesshallbewithin0.125to0.25timesthepipediameterandtheprobeofthermalflowswitchshallprotrudefromtheinnerwallofthepipe.ExplanationofWordinginThisSpecification1Wordsusedfordifferentdegreesofstrictnessareexplainedasfollowsinordertomarkthedifferencesinexecutingtherequirementsinthisspecification.1)Wordsdenotingaverystrictormandatoryrequirement:“Must”isusedforaffirmation;“mustnot”fornegation.2)Wordsdenotingastrictrequirementundernormalconditions:“Shall”isusedforaffirmation;“shallnot”fornegation.3)Wordsdenotingapermissionofaslightchoiceoranindicationofthemostsuitablechoicewhenconditionspermit:“Should”isusedforaffirmation;“shouldnot”fornegation.4)“May”isusedtoexpresstheoptionavailable,sometimeswiththeconditionalpermit.2“Shallmeettherequirementsof…”or“shallcomplywith…”isusedinthisspecificationtoindicatethatitisnecessarytocomplywiththerequirementsstipulatedinotherrelativestandardsandcodes.ListofQuotedStandardsDL/T1107, BasicSpecificationsofAutomaticComponentsforHydropowerPlant翻譯出版說明本譯本為國(guó)家能源局委托水電水利規(guī)劃設(shè)計(jì)總院按照有關(guān)程序和規(guī)定，統(tǒng)一組織翻譯的能源行業(yè)標(biāo)準(zhǔn)英文版系列譯本之一。202x年x月x日，國(guó)家能源局以202x年第x號(hào)公告予以公布。本譯本是根據(jù)中國(guó)水利水電出版社出版的《水力發(fā)電廠水力機(jī)械輔助系統(tǒng)流量監(jiān)視測(cè)量技術(shù)規(guī)程》NB/T10144—2019翻譯的，著作權(quán)歸國(guó)家能源局所有。在使用過程中，如出現(xiàn)異議，以中文版為準(zhǔn)。本譯本在翻譯和審核過程中，本標(biāo)準(zhǔn)編制單位及編制組有關(guān)成員給予了積極協(xié)助。為不斷提高本譯本的質(zhì)量，歡迎使用者提出意見和建議，并反饋給水電水利規(guī)劃設(shè)計(jì)總院。地址：北京市西城區(qū)六鋪炕北小街2號(hào)郵編：100120網(wǎng)址：本譯本翻譯單位：中國(guó)電建集團(tuán)北京勘測(cè)設(shè)計(jì)研究院有限公司本譯本翻譯人員：本譯本審核人員：國(guó)家能源局翻譯出版說明本譯本為國(guó)家能源局委托水電水利規(guī)劃設(shè)計(jì)總院按照有關(guān)程序和規(guī)定，統(tǒng)一組織翻譯的能源行業(yè)標(biāo)準(zhǔn)英文版系列譯本之一。202x年x月x日，國(guó)家能源局以202x年第x號(hào)公告予以公布。本譯本是根據(jù)中國(guó)水利水電出版社出版的《水力發(fā)電廠水力機(jī)械輔助系統(tǒng)流量監(jiān)視測(cè)量技術(shù)規(guī)程》NB/T101