【英文标准名称】:Aerospace-Drives,internal,offsetcruciform,ribbed-Metricseries
【原文标准名称】:航空航天.有条纹的内偏距十字交叉驱动器.米制系列
【标准号】:ISO14275-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-06
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC20
【标准类型】:()
【标准水平】:()
【中文主题词】:飞行器;公差(测量);航天运输;齿轮箱;航空航天运输;米制的;离合器;航空运输;动力传动系统;设计;飞行器部件;机械传动系统;法兰;尺寸;厘米克秒制;发动机
【英文主题词】:
【摘要】:ThisInternationalStandardspecifiesthedimensionsofmetricinternal,offsetcruciform,ribbeddrivesusedinmetricscrewsinthenominalthreaddiameterrangeof3mmto20mm.DriversandgaugesusedinconjunctionwiththesedrivesaredefinedinISO14277andISO14278.
【中国标准分类号】:V22
【国际标准分类号】:49_030_20
【页数】:6P;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