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ISO 4264-2007 石油产品.四变量公式法计算中间馏分燃料的十六烷指数

作者:标准资料网 时间:2024-05-16 22:47:25  浏览:8117   来源:标准资料网
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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


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【英文标准名称】:Milk-Determinationofnitrogencontent-Part3:Block-digestionmethod(Semi-microrapidroutinemethod)(ISO8968-3:2004);EnglishversionofDINENISO8968-3:2007-09
【原文标准名称】:牛奶.含氮量的测定.第3部分:小块分解法(半微量快速程序法)
【标准号】:ENISO8968-3-2007
【标准状态】:现行
【国别】:
【发布日期】:2007-09-01
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Analysis;Blanksamples;Blindvalue;Chemicalanalysisandtesting;Content;Crudeproteins;Dairyanalysis;Definition;Definitions;Determinationofcontent;Digestionmethod;Distillation;Foodinspection;Foodproducts;Foodstuff;Inter-laboratorytests;Laboratorytests;Mathematicalcalculations;Milk;Milkanalysis;Milkproducts;Nitrogen;Precision;Processdescription;Proteins;Rapidmethod;Samplingmethods;Semimicromethod;Testing;Titration
【摘要】:
【中国标准分类号】:X16
【国际标准分类号】:67_100_10
【页数】:17P.;A4
【正文语种】:英语


Product Code:SAE AMS6322
Title:Steel Bars, Forgings, and Rings 0.50Cr - 0.55Ni - 0.25Mo (0.38-0.43C) (SAE 8740)
Issuing Committee:Ams E Carbon And Low Alloy Steels Committee
Scope: Primarily for parts with section thickness of 0.375 in. (9.52 mm) and under at the time of heat treatment, requiring a through-hardening steel capable of developing hardness as high as 50 HRC when properly hardened and tempered and also parts of greater thickness but requiring proportionately lower hardness. Alloy: 8740 UNS Number: G87400

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