【英文标准名称】:DeterminationofthepermanentfiltrationofX-raytubeassemblies
【原文标准名称】:X射线管组件固有滤过的测定
【标准号】:IEC60522-1999
【标准状态】:作废
【国别】:国际
【发布日期】:1999-02
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC62B
【标准类型】:()
【标准水平】:()
【中文主题词】:医疗设备;滤波;X射线电子管;电气器具;X射线设备;X射线管组件;X射线仪;电气工程;医学放射学;医学科学
【英文主题词】:medicalsciences;medicalradiology;x-rayequipment;x-raytubeassemblies;definition;x-raytubes;medicalequipment;definitions;electricalengineering;electricappliances;x-rayapparatus;filtering
【摘要】:
【中国标准分类号】:C43
【国际标准分类号】:11_040_50
【页数】:5P;A4
【正文语种】:英语


【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