水力發(fā)電廠水力機械輔助系統流量監(jiān)視測量技術規(guī)程（NB／T 10144-2019）英文版

ICS27.140P59EnergySectorStandardofthePeople’sRepublicofChina中華人民共和國能源行業(yè)標準PNB/T10144-2019TechnicalSpecificationforFlowMonitoringandMeasuringofHydraulic-MechanicalAuxiliarySysteminHydroelectricPowerPlants水力發(fā)電廠水力機械輔助系統流量監(jiān)視測量技術規(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家能源局委托水電水利規(guī)劃設計總院按照有關程序和規(guī)定，統一組織翻譯的能源行業(yè)標準英文版系列譯本之一。202x年x月x日，國家能源局以202x年第x號公告予以公布。本譯本是根據中國水利水電出版社出版的《水力發(fā)電廠水力機械輔助系統流量監(jiān)視測量技術規(guī)程》NB/T10144—2019翻譯的，著作權歸國家能源局所有。在使用過程中，如出現異議，以中文版為準。本譯本在翻譯和審核過程中，本標準編制單位及編制組有關成員給予了積極協助。為不斷提高本譯本的質量，歡迎使用者提出意見和建議，并反饋給水電水利規(guī)劃設計總院。地址：北京市西城區(qū)六鋪炕北小街2號郵編：100120網址：本譯本翻譯單位：中國電建集團北京勘測設計研究院有限公司本譯本翻譯人員：本譯本審核人員：國家能源局翻譯出版說明本譯本為國家能源局委托水電水利規(guī)劃設計總院按照有關程序和規(guī)定，統一組織翻譯的能源行業(yè)標準英文版系列譯本之一。202x年x月x日，國家能源局以202x年第x號公告予以公布。本譯本是根據中國水利水電出版社出版的《水力發(fā)電廠水力機械輔助系統流量監(jiān)視測量技術規(guī)程》NB/T101