【英文标准名称】:Highstrengthstructuralboltingforpreloading-Part9:SystemHRorHV-Directtensionindicatorsforboltandnutassemblies
【原文标准名称】:预加载高强度结构螺栓总成.第9部分:HR或HV系统.螺栓和螺母组件的直接拉张器
【标准号】:BSEN14399-9-2009
【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】:验收规范;附件;合金钢;螺栓连接件;压力荷载;一致性;建筑;交货条件;名称与符号;尺寸规格;外螺纹紧固件;紧固件;功能特性;六角头螺钉;六角螺母;高抗拉;高强度螺栓;高强度钢;HR;制造;作标记;材料;机械连接;机械性能;材料的机械性能;螺母;物理性能;预应力的;生产;特性;螺钉;规范(验收);钢;强度等级;结构金属加工;钢结构作业;张力指示器;试验设备;测试;螺纹;维氏硬度;垫圈
【英文主题词】:Acceptancespecification;Accessories;Alloysteels;Boltedjoints;Compressionloading;Conformity;Construction;Deliveryconditions;Designations;Dimensions;External-threadfasteners;Fasteners;Functionalproperties;Hexagonheadscrews;Hexagonnuts;Hightensile;Hightensilebolts;High-tensilesteels;HR;Manufacturing;Marking;Materials;Mechanicallinkages;Mechanicalproperties;Mechanicalpropertiesofmaterials;Nuts;Physicalproperties;Prestressed;Production;Properties;Screws(bolts);Specification(approval);Steels;Strengthclass;Structuralmetalwork;Structuralsteelwork;Tensionindicators;Testequipment;Testing;Threads;Vickershardness;Washers
【摘要】:Thisdocumentspecifies,togetherwithEN14399-1,therequirementsforassembliesofhigh-strengthstructuralboltsandnuts,withlargewidthacrossflats,ofsystemHRorHV,includingtherequirementsforthegeneraldimensions,tolerances,materialsandperformancefortwogrades,H8andH10,ofcompressiblewasher-typedirecttensionindicators,nutfacewashersandboltfacewasherssuitableforpreloadedjoints.TheassembliesincludethenominalthreadsizesM12uptoandincludingM36andpropertyclasses8.8/8,8.8/10and10.9/10.Boltandnutassembliestothisdocumenthavebeendesignedtoallowpreloadingofatleast0,7f×AaccordingtoEN1993-1-8:2005(Eurocode3)andtoobtainductilitypredominantlybyplasticelongationoftheboltforsystemHRaccordingtoEN14399-3orbyplasticdeformationoftheengagedthreadsforsystemHVaccordingtoEN14399-4;alsocountersunkandfitboltsaccordingtoEN14399-7and-8respectively.Boltandnutassembliesconformingtothisdocumentmayincludewasher(s)accordingtoEN14399-6ortoEN14399-5(underthenutonly).Thepurposeofthedirecttensionindicatorsistoshowthatadefinedpreloadisachievedinthebolt.Thedirecttensionindicatorcanbeusedaloneorwithboltfacewashersornutfacewashersconformingtothisstandard.IneithercaseitisessentialthatthedirecttensionindicatorsareusedaspartofanassemblyinaccordancewithEN14399-1.TocomplywithEN14399-1,itisessentialthattheassembliesaresuppliedbyonemanufacturerandincludebolts,nuts,washersanddirecttensionindicators.ThetestmethodforsuitabilityforpreloadingisspecifiedinEN14399-2andsupplementedbyClause5.Guidanceontheuseofcompressiblewasher-typedirecttensionindicatorsisgiveninEN1090-2.
【中国标准分类号】:J13
【国际标准分类号】:21_060_01
【页数】:26P.;A4
【正文语种】:英语


【英文标准名称】:GuidefortheApplicationofNeutralGroundinginElectricalUtilitySystems,PartV-TransmissionSystemsandSubtransmissionSystems
【原文标准名称】:公用电气系统中性接地应用指南.第V部分:输电系统和二次输电系统
【标准号】:ANSI/IEEEC62.92.5-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:交流电流;分类;接地;发电;电气工程;电气设备;发电站;动力传输;选择;传输;传输系统;零线
【英文主题词】:Alternatingcurrent;Classification;Earthing;Electricpowergeneration;Electricalengineering;Electricalequipment;Powergeneratinginstallation;Powertransmission;Selection;Transmission;Transmissionsystems;Zeroconductors
【摘要】:Thisdocumentprovidesinformationonthebasicfactorsandgeneralconsiderationsinselectingtheclassandmeansofneutralgroundingforaparticularactransmissionorsub-transmissionsystem,andthesuggestedmethodandapparatustobeusedtoachievethedesiredgrounding.
【中国标准分类号】:F21
【国际标准分类号】:
【页数】:
【正文语种】:英语