【英文标准名称】:StandardSpecificationforLow-AlloySteelDeformedandPlainBarsforConcreteReinforcement
【原文标准名称】:混凝土增强用变形低合金钢和光面钢筋的标准规范
【标准号】:ASTMA706/A706M-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:合金钢;混凝土;变形;增强;钢;结构钢
【英文主题词】:Alloysteels;Concretes;Deformation;Reinforcement;Steels;Structuralsteels
【摘要】:1.1General—Thisspecificationcoversdeformedandplainlow-alloysteelbarsincutlengthsorcoilsforconcretereinforcementintendedforapplicationswhererestrictivemechanicalpropertiesandchemicalcompositionarerequiredforcompatibilitywithcontrolledtensilepropertyapplicationsortoenhanceweldability.ThestandardsizesanddimensionsofdeformedbarsandtheirnumberdesignationsaregiveninTable1.Thetextofthisspecificationreferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotes,excludingthoseintables,shallnotbeconsideredasrequirementsofthisspecification.1.2Grade—Barsareofasingleminimumyieldstrengthlevel:namely,60000psi[420MPa],designatedasGrade60[420].1.3Plainrounds,insizesuptoandincluding21?2in.[63.5mm]indiameterincoilsorcutlengths,whenordered,shallbefurnishedunderthisspecification.Forductilityproperties(elongationandbending),testprovisionsofthenearestsmallernominaldiameterdeformedbarsizeshallapply.1.4ControlledTensileProperties—Thisspecificationlimitsmechanicalproperties(Table2)toprovidethedesiredyield/tensilepropertiesforcontrolledtensilepropertyapplications.1.5Welding—Thisspecificationlimitschemicalcomposition(6.2)andcarbonequivalent(6.4)toenhancetheweldabilityofthematerial.Whensteelistobewelded,aweldingproceduresuitableforthechemicalcompositionandintendeduseorserviceshouldbeused.TheuseofthelatesteditionofAWSD1.4/D1.4Misrecommended.Thisdocumentdescribestheproperselectionofthefillermetals,preheat/interpasstemperatures,aswellas,performanceandprocedurequalificationrequirements.1.6Thisspecificationisapplicableforordersineitherinch-poundunits(SpecificationA706)orinSIunits[SpecificationA706M].1.7Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisspecification.
【中国标准分类号】:
【国际标准分类号】:77_140_15
【页数】:5P;A4
【正文语种】:英语


【英文标准名称】:Railwayapplications-Communication,signallingandprocessingsystems-Safetyrelatedelectronicsystemsforsignalling
【原文标准名称】:铁路设施.通信、信号传输和处理系统.信号传输用与安全性相关的电子系统
【标准号】:IEC62425-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-09
【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/TC9
【标准类型】:()
【标准水平】:()
【中文主题词】:通信系统;数据总线;定义;电气工程;电子工程;电子系统;信息交换;铁路设施;铁路工程;铁道车辆;铁路;安全;安全工程;安全要求;安全管理;信号装置;信号传输;规范(验收)
【英文主题词】:Communicationsystems;Databus;Definition;Definitions;Electricalengineering;Electronicengineering;Electronicsystems;Informationinterchange;Railwayapplications;Railwayengineering;Railwayvehicles;Railways;Safety;Safetyengineering;Safetyrequirements;Securitymanagement;Signaldevices;Signaltransmission;Specification(approval)
【摘要】:ThisInternationalStandardisapplicabletosafety—relatedelectronicsystems(includingsub-systemsandequipment)forrailwaysignallingapplications．Thescopeofthisstandard,anditsrelationshipwithotherIECstandards,areshowninFigure1．Thisstandardisintendedtoapplytoallsafety-relatedrailwaysignallingsystems/sub-system/equipment．However,thehazardanalysisandriskassessmentprocessesdefinedinIEC62278andthisstandardarenecessaryforallrailwaysignallingsystems/sub—systems,equipment,inordertoidentifyanysafetyrequirements．Ifanalysisrevealsthatnosafetyrequirementsexist(i.e.:thatthesituationisnon-safety-related),andprovidedtheconclusionisnotrevisedasaconsequenceoflaterchanges,thissafetystandardceasestobeapplicable．Thisstandardappliestothespecification,design,construction,installation,acceptance,operation,maintenanceandmodification/extensionphasesofcompletesignallingsystems,andalsotoindividualsub-systemsandequipmentwithinthecompletesystem．AnnexCincludesproceduresrelatingtoelectronichardwarecomponents．Thisstandardappliestogenericsub-systemsandequipment(bothapplication-independentandthoseintendedforaparticularclassofapplication),andalsotosystems/sub-systems/equipmentforspecificapplications．Thisstandardisnotapplicabletoexistingsystems/sub-systems,equipment(i．e．thosewhichhadalreadybeenacceptedpriortolhecreationofthisstandard)．However,asfarasreasonablypracticable,thisstandardshouldbeappliedtomodificationsandextensionstoexistingsystems,sub-systemsandequipment．Thisstandardisprimarilyapplicabletosystems/sub—systems,equipmentwhichhavebeenspecificallydesignedandmanufacturedforrailwaysignallingapplications．Itshouldalsobeapplied．asfarasreasonablypracticable,togeneral-purposeorindustrialequipment(e．g.:powersupplies,modems,etc．),whichisprocuredforuseaspartofasafety—relatedsignallingsystem．Asaminimum,evidenceshallbeprovidedinsuchcasestodemonstrate—eitherthattheequipmentisnotreliedonforsafety,一orIhattheequipmentcanbereliedonforthosefunctionswhichrelatetosafety．Thisstandardisapplicabletothefunctionalsafetyofrailwaysignallingsystems．Itisnotintendedtodealwiththeoccupationalhealthandsafetyofpersonnel；thissubjectiscoveredbyotherstandards．
【中国标准分类号】:S70
【国际标准分类号】:45_060;93_100
【页数】:197P.;A4
【正文语种】: