BS EN 60534-8-3 Ed.2-2000 工业流程控制阀.噪声.控制阀气动噪声预测法

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【英文标准名称】:Industrial-processcontrolvalves-Noiseconsiderations-Controlvalveaerodynamicnoisepredictionmethod-Controlvalveaerodynamicnoisepredictionmethod
【原文标准名称】:工业流程控制阀.噪声.控制阀气动噪声预测法
【标准号】:BSEN60534-8-3Ed.2-2000
【标准状态】:现行
【国别】:英国
【发布日期】:
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ThispartofIEC60534establishesatheoreticalmethodtopredicttheexternalsound-pressurelevelgeneratedinacontrolvalveandwithinadjacentpipeexpandersbytheflowofcompressiblefluids.Thismethodconsidersonlysingle-phasedrygasesandvapoursandisbasedontheperfectgaslaws.Thisstandardaddressesonlythenoisegeneratedbyaerodynamicprocessesinvalvesandintheconnectedpiping.Itdoesnotconsideranynoisegeneratedbyreflections,mechanicalvibrations,unstableflowpatternsandotherunpredictablebehaviour.Itisassumedthatthedownstreampipingisstraightforalengthofatleast2mfromthepointwherethenoisemeasurementismade.Thismethodisvalidonlyforsteelandsteelalloypipes(seeequations(38)and(40)in5.6).Themethodisapplicabletothefollowingsingle-stagevalves:globe(straightpatternandanglepattern),butterfly,rotaryplug(eccentric,spherical),ball,andvalveswithcagetrims.SpecificallyexcludedarethefullboreballvalveswheretheproductFPCexceeds50%oftheratedflowcoefficient.Forlimitationsonspeciallownoisetrimsnotcoveredbythisstandard,see6.5.WhentheMachnumberinthevalveoutletexceeds0,3forstandardtrimor0,2forlownoisetrim,theprocedureinclause7isused.TheMachnumberlimitsinthisstandardareasfollows:
【中国标准分类号】:
【国际标准分类号】:17_140_20;23_060_40
【页数】:60P;A4
【正文语种】:英语