DIN ETS 300303-1995 综合服务数字网(ISDN).ISDN全球移动通讯信系统(GSM).公共地面移动网(PLMN)信令接口

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【英文标准名称】:ValvesforanhydrousammoniaandLP-gas(otherthansafetyrelief)
【原文标准名称】:无水氨和液化石油气阀门(不包括安全卸荷阀)
【标准号】:UL125-2007
【标准状态】:作废
【国别】:美国
【发布日期】:2007-04-18
【实施或试行日期】:
【发布单位】:美国保险商实验所(US-UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:氨;压缩气体;气阀;气体;低压;石油气;测试;阀门
【英文主题词】:Ammonia;Compressedgases;Gasvalves;Gases;Lowpressure;Petroleumgas;Testing;Valves
【摘要】:Theserequirementscoverthefollowingtypesofanhydrousammoniaandliquefiedpetroleumgas(LP-Gas)valvesforuseattemperatureswithintherangeofminus40鳩(minus40鳦)to130鳩(55鳦):a)Shut-offValves,b)ExcessFlowValves,c)BackPressureCheckValves,d)FillerValves,e)VaporReturnValves,andf)ActuatedLiquidWithdrawalExcess-FlowValves.ValvescoveredbytheserequirementsareforuseinsystemsandfacilitiescoveredinthefollowingStandards:a)SafetyRequirementsfortheStorageandHandlingofAnhydrousAmmonia,ANSI/CGAG2.1(ANSIK61.1);b)LiquefiedPetroleumGasCode,NFPA58;andc)UtilityLP-GasPlantCode,NFPA59.Theserequirementsdonotcovershut-offvalvesofthetypecommonlyreferredtoas"cylindervalves"usedoncontainersconstructedunderDepartmentofTransportation(DOT)Specifications.TheserequirementsdonotapplytoLP-Gasvalvesforuseoncontainersorinsystemsforthefollowing:a)Refrigeratedstoragesystemsandb)Marineandpipelineterminals,chemicalplants,naturalgasprocessingplants,refineriesortankfarms,where"tankfarms"donotincludestorageatindustriallocations.Theserequirementsdonotapplytovalvesforanhydrousammoniaforuseoncontainersorinsystemsforthefollowing:a)Refrigeratedstoragesystems,b)Ammoniamanufacturingplants,c)Refrigerationplantswhereammoniaisusedsolelyasarefrigerant,andd)Ammoniatransportationpipelines.Exceptforsuchobservationsasarerequiredtoascertainperformancecharacteristics,theassigningofpressureand/orflowcapacityratingsisnotwithinthescopeoftheserequirements.Aproductthatcontainsfeatures,characteristics,components,materials,orsystemsnewordifferentfromthosecoveredbytherequirementsinthisstandard,andthatinvolvesariskoffireorofelectricshockorinjurytopersonsshallbeevaluatedusingappropriateadditionalcomponentandend-productrequirementstomaintainthelevelofsafetyasoriginallyanticipatedbytheintentofthisstandard.Aproductwhosefeatures,characteristics,components,materials,orsystemsconflictwithspecificrequirementsorprovisionsofthisstandarddoesnotcomplywiththisstandard.Revisionofrequirementsshallbeproposedandadoptedinconformancewiththemethodsemployedfordevelopment,revision,andimplementationofthisstandard.
【中国标准分类号】:J16
【国际标准分类号】:23_060_40
【页数】:
【正文语种】:英语


【英文标准名称】:Methodsofmeasurementforradiotransmitters-Part5:Performancecharacteristicsoftelevisiontransmitters(IEC60244-5:1992);GermanversionEN60244-5:1994
【原文标准名称】:无线电发射机的测量方法.第5部分:电视发射机特性
【标准号】:EN60244-5-1994
【标准状态】:现行
【国别】:
【发布日期】:1994-07
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:非线性的;频率;测量技术;寄生调制;信号;特性;无线电发射机;测量;电气工程;电视发射机;功率因数;调频;传输特性;线性的;通道;水准仪;电信;声道;数字;数据;电学测量;调制;电子仪器;试验;信号失真;电气设备;无线电设备;定义;额定值;功率输出;测量方法;传输性能;功率消耗;畸变
【英文主题词】:Broadcastingtransmitters;Channels;Colourtelevision;Data;Definition;Definitions;Distortion;Electricalappliances;Electricalengineering;Electricalmeasurement;Electronicinstruments;Figures;Frequencies;Frequencymodulation;Levels;Linear;Measurement;Measuringtechniques;Methodsformeasuring;Modulation;Monochrometelevision;Non-linear;Performance;Performancecharacteristics;Powerconsumption;Powerfactor;Poweroutput;Properties;Radioequipment;Radiotransmitters;Ratings;Signaldistortion;Signaltransmission;Signals;Soundchannels;Spuriousmodulation;Telecommunication;Television;Televisiontransmitters;Testing;Transmissioncharacteristics;Transmissionperformance;Transposers;Visualsignals
【摘要】:
【中国标准分类号】:M36
【国际标准分类号】:33_170
【页数】:64P.;A4
【正文语种】:英语