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【英文标准名称】:Petroleumproducts-Calculationofcetaneindexofmiddle-distillatefuelsbythefour-variableequation
【原文标准名称】:石油产品.四变量公式法计算中间馏分燃料的十六烷指数
【标准号】:ISO4264-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-08
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC28
【标准类型】:()
【标准水平】:()
【中文主题词】:机动车燃料;十六烷值;测定;馏分;燃料;指数;液体燃料;材料测试;数学计算;参数;石油产品;数量估计
【英文主题词】:Automotivefuels;Cetanenumber;Determination;Distillates;Fuels;Indexes;Liquidfuels;Materialstesting;Mathematicalcalculations;Parameters;Petroleumproducts;Quantitysurveying
【摘要】:ThisInternationalStandarddescribesaprocedureforthecalculationofthecetaneindexofmiddle-distillatefuelsfrompetroleum-derivedsources.Thecalculatedvalueistermedthe“cetaneindexbyfour-variableequation”.ThroughouttheremainingtextofthisInternationalStandard,theterm“cetaneindex”impliescetaneindexbyfour-variableequation.ThisInternationalStandardisnotapplicabletofuelscontainingadditivesforraisingthecetanenumber,nortopurehydrocarbons,nortodistillatefuelsderivedfromcoal.Itisapplicabletofuelscontainingnon-petroleumderivativesfromtarsandandoilshale.NOTE1ThisInternationalStandardwasoriginallydevelopedusingamatrixoffuels,someofwhichcontainnonpetroleumderivatesfromtarsandsandoilshale.Othercetaneindexequationshavesincebeendevelopedwhichcanbemoreapplicabletotarsandsproducts.NOTE2Thecetaneindexisnotanalternativewaytoexpressthecetanenumber;itisasupplementarytool,tobeusedwithdueregardforitslimitations.NOTE3Thecetaneindexisusedtoestimatethecetanenumberofdieselfuelwhenatestengineisnotavailabletodeterminethispropertydirectly,orwheninsufficientsampleisavailableforanenginerating.Incaseswherethecetanenumberofafuelhasbeenpreviouslyestablished,thecetaneindexcanbeusedtoverifythecetanenumberofsubsequentsamplesofthatfuel,providedthefuel'ssourceandmodeofmanufactureremainunchanged.TherecommendedrangeoffuelpropertiesforapplicationofthisInternationalStandardisasfollows:FuelpropertyRecommendedrangeCetanenumber32,5–56,5Densityat15°C,kg/m3805,0–895,010%(V/V)distillationrecoverytemperature,°C171–25950%(V/V)distillationrecoverytemperature,°C212–30890%(V/V)distillationrecoverytemperature,°C251–363Withintherecommendedrangeofcetanenumber(32,5to56,5),theexpectederrorofthepredictionviathecetaneindexequationwillbelessthan±2cetanenumbersfor65%ofthedistillatefuelsexamined.Errorsmaybegreaterforfuelswhosepropertiesfalloutsidetherecommendedrangeofapplication.
【中国标准分类号】:E30
【国际标准分类号】:75_160_20
【页数】:7P.;A4
【正文语种】:英语


【英文标准名称】:Anti-pollutioncheckvalves-DN6toDN250inclusiveFamilyE,typeA,B,CandD
【原文标准名称】:防污染止回阀.包括E系列A、B、C和D型的DN6～DN250
【标准号】:BSEN13959-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2006-10-31
【实施或试行日期】:2006-10-31
【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】:反虹吸系统;弯曲力矩;化学性质;连接件;连续性试验;定义;交货条件;设计;名称与符号;尺寸;排放旋塞;饮用水设备;饮用水供给;流量测量;图形符号;液压的;检验;作标记;材料;机械工人;物理性能;压力;压力试验;性能;额定压力;单一水嘴;规范(验收);截止阀;材料强度;符号;温度;测试;测试装置;测试要求;密封性;类型;阀门;给水;给水(建筑物);给水设施
【英文主题词】:Anti-siphonagesystems;Bendingmoment;Chemicalproperties;Connections;Continuitytests;Definition;Definitions;Deliveryconditions;Design;Designations;Dimensions;Draw-offtaps;Drinkingwaterinstallations;Drinkingwatersupply;Flowmeasurements;Graphicsymbols;Hydraulic;Inspection;Marking;Materials;Mechanic;Physicalproperties;Pressure;Pressuretests;Properties;Ratedpressure;Singletaps;Specification(approval);Stopvalves;Strengthofmaterials;Symbols;Temperature;Testing;Testingdevices;Testingrequirements;Tightness;Types;Valves;Watersupply;Watersupply(buildings);Watersupplyinstallations
【摘要】:Thepurposeofthisdocumentistospecify:?fieldofapplicationofanti-pollutioncheckvalves;?backflowpreventionproperties,dimensionalandphysio-chemicalproperties,andpropertiesofgeneralhydraulic,mechanicalandacousticdesignforanti-pollutioncheckvalvesofnominalsizesDN6toDN250inclusive;?familyE,typeA,controllableanti-pollutioncheckvalve(withtestport);?familyE,typeB,non-controllableanti-pollutioncheckvalve,includingcartridgecheckvalve;?familyE,typeC,controllableanti-pollutiondoublecheckvalve(withtestports);?familyE,typeD,non-controllableanti-pollutiondoublecheckvalve,includingcartridgedoublecheckvalve;?testproceduresandrequirementsforverifyingthebackflowprotectionpropertiesofstopvalves,draw-offtapsetc.whichincorporateacheckvalvefunction.Stopvalves,drawofftapsetc,needalsotocomplywitharecognisedstandard;?marking;?presentationatdelivery.
【中国标准分类号】:Q81
【国际标准分类号】:23_060_50
【页数】:34P.;A4
【正文语种】:英语