NF T51-212-1988 塑料.稀溶液中高聚物的粘度值限定粘度值测定用标准化方法导则

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【英文标准名称】:Communicationcables-Specificationsfortestmethods-Part1-10:Electricaltestmethods;Crosstalk;GermanversionEN50289-1-10:2001
【原文标准名称】:通信电缆.试验方法规范.第1-10部分:电气试验方法.串音;德文版本EN50289-1-10:2001
【标准号】:DINEN50289-1-10-2002
【标准状态】:现行
【国别】:德国
【发布日期】:2002-07
【实施或试行日期】:2002-07-01
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;测量技术;作标记;串音衰减;串音;串音衰减测量;测试;数字的;模拟;数字信号;阻尼(波);模拟信号;通信电缆;远程通信;电气工程;电气试验;规范;电缆;电缆
【英文主题词】:Analogue;Analoguesignals;Cables;Communicationcables;Cross-talk;Crosstalkattenuation;Crosstalkattenuationmeasure;Damping;Definitions;Digital;Digitalsignals;Electriccables;Electricalengineering;Electricaltesting;Marking;Measuringtechniques;Specification;Telecommunication;Testing
【摘要】:Thedocumentdetailsthetestmethodstodeterminethecrosstalkcablesusedinanalogueanddigitalcommunicationsystems.
【中国标准分类号】:K13
【国际标准分类号】:33_120_20
【页数】:11P.;A4
【正文语种】:德语


【英文标准名称】:Designandinstallationofpreinsulatedbondedpipesystemsfordistrictheating
【原文标准名称】:区域供暖用预隔热连接管道系统的设计和安装
【标准号】:BSEN13941-2003
【标准状态】:作废
【国别】:英国
【发布日期】:2003-04-02
【实施或试行日期】:2003-04-02
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:组合套管;组合管;定义;设计;长距离加热;区域供暖;热水供应链;装置;套管;管绝缘层;长距离供热系统;管系统;管线;管道工程管系统;规范(验收);钢管;隔热;地下;水管系统;水管
【英文主题词】:Compositejacketpipes;Compositetubes;Definitions;Design;Distantheating;Districtheating;Hotwaternetworks;Installations;Jackettubes;Laggingofadrum;Longdistanceheatingsystems;Pipesystem;Pipelines;Pipeworksystems;Specification(approval);Steelpipes;Thermalinsulation;Underground;Waterpipesystems;Waterpipes
【摘要】:ThisEuropeanStandardspecifiesrulesfordesign,calculationandinstallationforpreinsulatedbondedpipesystemsforburiedhotwaterdistributionandtransmissionnetworks,see.Figure2,withpipeassembliesinaccordancewithEN253,forcontinuousoperationwithhotwateratvarioustemperaturesupto120℃andoccasionallywithpeaktemperaturesupto140℃andmaximuminternalpressure25bar(overpressure).Applicationrule:Forlargerpipedimensionsandpressuresbelow25barwallthicknessbiggerthanspecifiedinEN253canberequiredforstraightpipes,bendsandtees.Theprinciplesofthestandardcanbeappliedtopreinsulatedpipesystemswithpressureshigherthan25bar,providedthatspecialattentionispaidtotheeffectsofpressure.Adjacentpipesbelongingtothenetwork(e.g.pipesinducts,valvechambers,roadcrossingsabovegroundetc.)canbedesignedandinstalledaccordingtothisstandard.Thestandardassumesuseoftreatedwater,whichbysoftening,demineralisation,deaeration,addingofchemicals,orotherwisehasbeentreatedtopreventinternalcorrosionanddepositsinthepipes.Thisstandardisnotapplicableforsuchunitsas-pumps,-exchangers,-boilerinstallations,tankinstallations,-consumerinstallations.However,thefullfunctionalabilityanddurabilityofsuchunitsshouldbeensuredinconsiderationoftheimpactsfromthedistrictheatingsystemandotherimpactsoccurringfromtheconditionsunderwhichtheyhavebeeninstalled.GuidelinesforproductqualityinspectionandinsitutestsofjointsaregiveninannexAofEN448:2003,annexDofEN253:2003,annexAofEN488:2003andannexBofEN489:2003.GuidelinesforweldingofpolyethylenecasingaregiveninannexBofEN448:2003.TheestimationofexpectedlifewithcontinuousoperationatvarioustemperaturesisoutlinedinannexBofEN253:2003
【中国标准分类号】:Q83
【国际标准分类号】:91_140_10
【页数】:114P;A4
【正文语种】:英语