【英文标准名称】:Low-voltageswitchgearandcontrolgear-Part7-1:Ancillaryequipment-Terminalblocksforcopperconductors
【原文标准名称】:低压开关设备和控制设备.第7-1部分:辅助设备.铜导线用接线板
【标准号】:IEC60947-7-1-2009
【标准状态】:现行
【国别】:国际
【发布日期】:2009-04
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC17B
【标准类型】:()
【标准水平】:()
【中文主题词】:辅助装置;电缆连接件;夹具;结构要求;控制图;铜;铜导线;尺寸;电缆;导电体;电气工程;电气试验;铭刻;检验;计数检查;极限(数学);低电压;低压开关设备;作标记;性能;额定值;规范(验收);开关;开关设备;接线板;试验
【英文主题词】:Auxiliarydevices;Cablejunctions;Clamps;Constructionrequirements;Controlcharts;Copper;Copperconductors;Definitions;Dimensions;Electriccables;Electricconductors;Electricalengineering;Electricaltesting;Inscription;Inspection;Inspectionbyattributes;Limits(mathematics);Lowvoltage;Low-voltageswitchgear;Marking;Productinformation;Properties;Ratings;Specification(approval);Switches;Switchgear;Terminalblocks;Testing
【摘要】:
【中国标准分类号】:K31
【国际标准分类号】:29_130_20
【页数】:68P;A4
【正文语种】:英语


【英文标准名称】:Designandinstallationofpreinsulatedbondedpipesystemsfordistrictheating
【原文标准名称】:区域供暖用预绝热连接管的设计与安装
【标准号】:BSEN13941-2009+A1-2010
【标准状态】:现行
【国别】:英国
【发布日期】:2009-07-31
【实施或试行日期】:2009-07-31
【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】:符合夹套管;合成管;定义(术语);设计;远距离供热;区域供暖;热水供应网;安装;套管;鼓箍;长距离加热系统;材料;数学计算;聚乙烯(PE);管道敷设;管道系统;管道;管道工程系统;管系统;塑料;聚氨酯;规范(验收);钢管;钢管道;钢;测试;隔热;地下;配水;水管系统;水管
【英文主题词】:Compositejacketpipes;Compositetubes;Definitions;Design;Distantheating;Districtheating;Hotwaternetworks;Installations;Jackettubes;Laggingofadrum;Longdistanceheatingsystems;Materials;Mathematicalcalculations;PE;Pipelaying;Pipesystem;Pipelines;Pipeworksystems;Pipingsystem;Plastics;Polyurethane;Specification(approval);Steelpipes;Steeltubes;Steels;Testing;Thermalinsulation;Underground;Waterdistribution;Waterpipesystems;Waterpipes
【摘要】:ThisEuropeanStandardspecifiesrulesfordesign,calculationandinstallationforpreinsulatedbondedpipesystemsforburiedhotwaterdistributionandtransmissionnetworks(cf.Figure2)withpipeassembliesinaccordancewithEN253,forcontinuousoperationwithhotwateratvarioustemperaturesupto120oCandoccasionallywithpeaktemperaturesupto140oCandmaximuminternalpressure25bar(overpressure).Applicationrule:Forlargerpipedimensionsandpressuresbelow25barwallthicknessbiggerthanspecifiedinEN253canberequiredforstraightpipes,bendsandtees.Theprinciplesofthestandardcanbeappliedtopreinsulatedpipesystemswithpressureshigherthan25bar,providedthatspecialattentionispaidtotheeffectsofpressure.Adjacentpipesbelongingtothenetwork(e.g.pipesinducts,valvechambers,roadcrossingsabovegroundetc.)canbedesignedandinstalledaccordingtothisstandard.Thestandardassumesuseoftreatedwater,whichbysoftening,demineralisation,deaeration,addingofchemicals,orotherwisehasbeentreatedtopreventinternalcorrosionanddepositsinthepipes.Thisstandardisnotapplicableforsuchunitsas:a)pumps,b)exchangers,c)boilerinstallations,tankinstallations,d)consumerinstallations.However,thefullfunctionalabilityanddurabilityofsuchunitsshouldbeensuredinconsiderationoftheimpactsfromthedistrictheatingsystemandotherimpactsoccurringfromtheconditionsunderwhichtheyhavebeeninstalled.GuidelinesforproductqualityinspectionandinsitutestsofjointsaregiveninAnnexAofEN448-2009,AnnexDofEN253-2009,AnnexAofEN488-2009andAnnexBofEN489-2009.GuidelinesforweldingofpolyethylenecasingaregiveninAnnexBofEN448-2009.TheestimationofexpectedlifewithcontinuousoperationatvarioustemperaturesisoutlinedinAnnexBofEN253-2009.
【中国标准分类号】:Q83
【国际标准分类号】:91_140_10
【页数】:128P.;A4
【正文语种】:英语