EN 1254-4-1998 铜和铜合金.管配件.第4部分:把其它连接端头和毛细管或压力接头相连接的管件
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【英文标准名称】:Copperandcopperalloys-Plumbingfittings-Part4:Fittingscombiningotherendconnectionswithcapillaryorcompressionends;GermanversionEN1254-4:1998
【原文标准名称】:铜和铜合金.管配件.第4部分:把其它连接端头和毛细管或压力接头相连接的管件
【标准号】:EN1254-4-1998
【标准状态】:现行
【国别】:
【发布日期】:1998-03
【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】:软钎焊连接;试验要求;钎焊;试验;最大;连接尺寸;温度;毛细管接头;管联接器;公差(测量);配件;铜合金;铜;管道配件;极限偏差;连接;材料;名称与符号;管;检验;毛细钎焊配件;压力;管端头;规范(验收);尺寸;作标记;定义;定义;尾端件
【英文主题词】:Capillaryfittings;Capillarysolderingfittings;Connectingdimensions;Connections;Copper;Copperalloys;Definition;Definitions;Designations;Dimensions;Endpieces;Fittings;Inspection;Limitdeviations;Marking;Materials;Maximum;Pipecouplings;Pipefittings;Pipes;Pressure;Solderedjoints;Solderings;Specification(approval);Temperature;Testing;Testingrequirements;Tolerances(measurement);Tubeend
【摘要】:
【中国标准分类号】:H62
【国际标准分类号】:23_040_40
【页数】:14P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforCalculatedCetaneIndexofDistillateFuels
【原文标准名称】:计算馏出燃料十六烷指数用标准试验方法
【标准号】:ASTMD976-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.E0.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:机动车燃料;十六烷;十六烷值;数学计算;石油产品;工艺
【英文主题词】:cetane;cetaneindex;dieselfuel
【摘要】:TheCalculatedCetaneIndexisonetoolavailableforestimatingASTMcetanenumberwhereatestengineisnotavailablefordeterminingthisproperty.Itmaybeemployedforapproximatingcetanenumberwherethequantityofsampleistoosmallforanenginerating.Incaseswherethecetanenumberofafuelhasbeeninitiallyestablished,theindexisusefulasacetanenumbercheckonsubsequentsamplesofthatfuel,provideditssourceandmodeofmanufactureremainunchanged.TestMethodD4737mayalsobeusedtoapproximatetheASTMcetanenumberofdieselfuels.3.2.1ProcedureAofTestMethodD4737wasdevelopedasaresultofalargerdegreeofoffsetbetweenTestMethodD976CetaneIndexandtheresultsofTestMethodD613overtheentirerangeofthecorrelation.Generally,ithasbeenfoundthatuseofTestMethodD4737resultsinlessoffsetthanuseofTestMethodD976,buttherecanbespecificcaseswherethisisnottrue.3.2.2ProcedureAofTestMethodD4737isrecommendedtoestimatethecetanenumberofdieselfuelswithsulfurcontentsabove500ppmorNo.1x2013;Ddieselfuels.3.2.3ProcedureBofTestMethodD4737isrecommendedtoestimatethecetanenumberofNo.2x2013;Ddieselfuelswithsulfurcontentsatorbelow500ppm.CalculatedCetaneIndex,asdescribedinTestMethodD976x2013;80,isrecognizedbytheUnitedStatesEPAasanalternativemethodtomeettheU.S.FederalDieselaromaticslimitfordieselfuelscontaininglessthan500ppmsulfur.TheequationforCalculatedCetaneIndexinTestMethodD976x2013;80andinthisversion(D976x2013;06)ofthetestmethodarethesame.1.1ThistestmethodcoverstheCalculatedCetaneIndexformula,whichrepresentsameansfordirectlyestimatingtheASTMcetanenumberofdistillatefuelsfromAPIgravityandmid-boilingpoint.Theindexvalue,ascomputedfromtheformula,istermedtheCalculatedCetaneIndex.1.2TheCalculatedCetaneIndexisnotanoptionalmethodforexpressingASTMcetanenumber.Itisasupplementarytooltoestimatecetanenumberwhenusedwithdueregardforitslimitations.1.3TheCalculatedCetaneIndexformulaisparticularlyapplicabletostraight-runfuels,catalyticallycrackedstocks,andblendsofthetwo.Note1ThistestmethodistemporarilyretainedbecausetheproposaltotheU.S.EPAtocontroldieselfuelaromaticsconcentrationsviaa40CalculatedCetaneIndexminimumisbasedonthecorrelationbetweenTestMethodD976andaromaticsconcentration.TestMethodD4737isthepreferredmethodasestimatorofcetanenumber.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:4P.;A4
【正文语种】:
