【英文标准名称】:Cylindricalhelicalspringsmadefromrectangularandsquaresectionwireandbar-Guidetocalculationanddesign-Compressionsprings
【原文标准名称】:矩形和方型线材和棒材制的圆柱形螺旋式弹簧.计算和设计指南.压缩弹簧
【标准号】:BS8726-1-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-09-25
【实施或试行日期】:2002-09-25
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:四方形;压缩弹簧;扁形;螺旋弹簧;弹簧;尺寸公差;长方形;设计;尺寸;金属线;圆柱形;棒材;设计计算
【英文主题词】:Bars(materials);Compressionsprings;Cylindricalshape;Design;Designcalculations;Dimensionaltolerances;Dimensions;Helicalsprings;Rectangularshape;Springs;Squareshape;Wires
【摘要】:ThisBritishStandardprovidesguidanceonthedesignofparallelsidedhelicalcompressionspringsmanufacturedfromrectangularandsquaresectionwireandbar.Thisstandardappliesonlytospringsmadefromrectangularsectionmaterialwheretheratioofradialdimension,6,totheaxialdimension,h,termedtheshapefactor,m,isnotgreaterthan2.5andnotlessthan0.4.NOTE1Thisappliesbecause,outsidetheshapefactorrange2.5to0.4,itisdifficulttocoilaspringaccurately.NOTE2Therearenumerousmethodsofcalculatingtheparametersnecessaryforthedesignofspringsandinitiallythedesignerisfreetouseanyoneofthese.Threetypesofendcoilsareprovidedfor,i.e.openend,closedendandclosedandgroundend,thelastofthesebeingapplicableonlytospringswheretheaxialdimensionofmaterialis0.5mmorgreater.ThisBritishStandarddifferentiatesbetweenspringsthathaveorhavenotbeenstressrelievedafterforming,designatedgroupAsprings,andsprings,thematerialofwhichhasundergoneastructuralchangebyheattreatmentafterforming,designatedgroupBsprings.ThisBritishStandardgivestwomethodsofspecifyingspringsforgeneralpurposesandonemethodoftestingsprings.
【中国标准分类号】:J26
【国际标准分类号】:21_160
【页数】:34P;A4
【正文语种】:英语


【英文标准名称】:Watermeters—Part2:Installationandconditionsofuse
【原文标准名称】:水表.安装和使用条件
【标准号】:BSEN14154-2-2005
【标准状态】:作废
【国别】:英国
【发布日期】:2005-06-23
【实施或试行日期】:2005-06-23
【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】:冷水计;热水计;计量机械;计量学;作标记;范围;仪表;设计认证;污染控制;试验装置;产品规范;饮用水;水常规(实验);使用;饮用水管线;给水;电子的;水;指示装置;水表;分类系统;名称与符号;导则;安全;额定值;选择;校正;定义;额定压力;安装条件;冷水;流量计;耗水;额定流量;指示器;压力降;喷管流量;螺栓连接(法兰);测量;螺纹连接;使用条件;使用条件;适用性;规范(验收);检修;电子仪器;安装;流量测量;输水管道;特性;特性;冷水管;装置;安装说明;人员;计数器;交付使用
【英文主题词】:Bolting;Calibration;Characteristics;Classificationsystems;Coldwater;Coldwaterconduit;Coldwatermeter;Commissioning;Conditionofuse;Counters;Definition;Definitions;Designcertifications;Designations;Drinkingwaterlines;Electronic;Electronicinstruments;Fitnessforpurpose;Flowmeasurements;Flowmeters;Guidelines;Hot-watermeters;Indicatingdevices;Indicationdevice;Installationinstructions;Installations;Marking;Measurement;Meteringmechanism;Meters;Metrology;Mounting;Mountingconditions;Nozzledischarge;Operatingconditions;Personnel;Pollutioncontrol;Potablewater;Pressuredrops;Productspecification;Properties;Ratedflow;Ratedpressure;Ratings;Repairs;Safety;Scope;Selection;Specification(approval);Specifications;Telltales;Testingdevices;Thread-connections;Usage;Water;Waterconsumption;Watermeters;Waterpipelines;Waterpractice;Watersupply
【摘要】:Thisdocumentspecifiescriteriaforselectionofwatermeters,installationrequirementsandthefirstoperationofneworrepairedmeterstoensureaccurateconstantmeasurementandreliablereadingofthemeter.InapplicationswhereawatermeterislegallyrequiredtoconformtotherequirementsoftheMeasuringInstrumentsDirective,thisdocumentmaybeusedtodemonstrateconformity.Wherelegalnationalrequirementsexisttheyshallinallcasestakeprecedenceoverorsupplementthespecificationsgiveninthispartofthisdocument.
【中国标准分类号】:N12
【国际标准分类号】:91_140_60
【页数】:24P.;A4
【正文语种】:英语