【英文标准名称】:StandardPracticeforCalculationofCertainPhysicalPropertiesofLiquefiedPetroleum(LP)GasesfromCompositionalAnalysis
【原文标准名称】:通过组分分析计算液化石油气的某些物理性质的标准实施规范
【标准号】:ASTMD2598-2002(2007)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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.H0
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:特性;数学计算;石油产品
【英文主题词】:liquefiedpetroleumgases;motoroctane;relativedensity;vaporpressure
【摘要】:1.1Thispracticecovers,bycompositionalanalysis,theapproximatedeterminationofthefollowingphysicalcharacteristicsofcommercialpropaneandspecial-dutypropane(coveredbySpecificationD1835):vaporpressure,relativedensity,andmotoroctanenumber(MON).1.2Thispracticeisnotapplicabletoanyproductexceedingspecificationsfornonvolatileresidues.(SeeTestMethodD2158.)1.3Forcalculatingmotoroctanenumber,thispracticeisapplicableonlytomixturescontaining20%orlessofpropene.1.4Forcalculatedmotoroctanenumberinmethod,thispracticeisbasedonmixturescontainingonlycomponentsshowninTable1.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.
【中国标准分类号】:E46
【国际标准分类号】:75_160_30
【页数】:2P.;A4
【正文语种】:


【英文标准名称】:StandardPracticeforLife-CycleCostAnalysisofCorrugatedMetalPipeUsedforCulverts,StormSewers,andOtherBuriedConduits
【原文标准名称】:涵洞、雨水管道和其它地下管道用波纹形金属管寿命周期成本分析的标准实施规范
【标准号】:ASTMA930-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:A05.17
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:成本分析
【英文主题词】:costanalysis;discountrate;drainagesystems;engineeringeconomics;leastcost;life-cyclecost;materialservicelife;presentvalueanalysis;projectdesignlife;Corrugatedsteelsewer/drainpipe;Costanalysis(ofbuildingconstructions);D
【摘要】:LCCanalysisisaneconomicmethodforevaluatingalternativesthatarecharacterizedbydifferingcashflowsoverthedesignatedprojectdesignlife.ThemethodentailscalculatingtheLCCofeachalternatecapableofsatisfyingthefunctionalrequirementoftheprojectandcomparingthemtodeterminewhichhas(have)thelowestestimatedLCCovertheprojectdesignlife.TheLCCmethodisparticularlysuitablefordeterminingwhetherthehigherinitialcostofanalternativeiseconomicallyjustifiedbyreductionsinfuturecosts(forexample,operatingmaintenance,rehabilitation,orreplacement)whencomparedtoanalternativewithlowerinitialcostsbuthigherfuturecosts.Ifadesignalternativehasbothalowerinitialcostandlowerfuturecoststhanotheralternatives,anLCCanalysisisnotnecessarytoshowthattheformeristheeconomicallypreferablechoice.1.1Thispracticecoversaprocedureforusinglife-cyclecost(LCC)analysistechniquestoevaluatealternativedrainagesystemdesignsusingcorrugatedmetalpipethatsatisfiesthesamefunctionalrequirements.1.2TheLCCtechniquemeasuresthepresentvalueofallrelevantcostsofinstalling,operating,andmaintainingalternativedrainagesystems,suchasengineering,construction,maintenance,rehabilitation,orreplacement,overaspecifiedperiodoftime.Thepracticealsoaccommodatesanyremainingresidualorsalvagevalue.1.3UsingtheresultsoftheLCCanalysis,thedecisionmakercanthenidentifythealternative(s)withthelowestestimatedtotalcostbasedonthepresentvalueofallcosts.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q81
【国际标准分类号】:23_040_01
【页数】:5P.;A4
【正文语种】:英语