MIL-PRF-27617F
作者:标准资料网 时间:2024-05-13 12:29:23 浏览:9729
来源:标准资料网
MIL-PRF-27617F, PERFORMANCE SPECIFICATION: GREASE, AIRCRAFT AND INSTRUMENT, FUEL AND OXIDIZER RESISTANT (17 FEB 1998) [SUPERSEDING MIL-G-2617E]., This specification covers the requirements for greases resistant to hydrocarbon fuel and liquid oxygen and for use as lubricants in aircraft, aerospace vehicles, and supporting equipment (see 6.1). These greases are identified by NATO code numbers as follow (see 6.6): Type I - G397; Type II - G-398; Type III - G-399; and Type IV - G-1350.
【英文标准名称】:StandardTestMethodforBreakingStrengthofYarninSkeinForm
【原文标准名称】:绞纱形式下纱线的断裂强度的试验方法
【标准号】:ASTMD1578-1993(2006)e1
【标准状态】:现行
【国别】:
【发布日期】:1993
【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】:D13.58
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:绞纱;纺织材料;试验;断裂荷载;纱;纺织试验;机织物
【英文主题词】:breakingstrength;breakingtenacity;skein;skeinbreakfactor;strand;yarn
【摘要】:1.1Thistestmethodcoversthedeterminationofthebreakingstrengthofyarninskeinform.Theobservedbreakingstrengthisexpressedinunitsofforce,andequationsareprovidedtoconvertbreakingstrengthtoskeinbreakingtenacityandtoskeinbreakfactor.Note1Forthedeterminationofthebreakingstrengthandelongationofyarnbythesinglestrandmethod,refertoTestMethodD2256.1.2Thistestmethodisapplicabletospunyarns,eithersingleorplied,composedofanyfiberorblendoffibers,butisnotsuitableforyarnswhichstretchmorethan5%whenthetensionisincreasedfrom2.5to7.5mN/texor0.03to0.08gf/denier.1.3Thistestmethodprovidesthreeoptionsbasedontheperimeterofthereel,thenumberofwrapsintheskein,andthemachinespeedortime-to-break.1.3.1Option1Eighty,forty,ortwentyturnsona1.50-mor1.5-ydreel,brokenat300mm/minor12in./min.1.3.2Option2Fiftyturnsona1.00-mor1-ydreel,brokenat300mm/minor12in./min.1.3.3Option3Fiftyturnsona1-mreel,brokenin20s.Note2Option1isingeneraluseintheUnitedStates,Option2isusedforwoolenyarns,andOption3hasbeenproposedintheInternationalStandardsOrganization(ISO)forinternationaluse.Note3Metricreelsareavailablewith1and1.125-mcircumferences.Datafromthetworeelswillbeabout1%different(see).ISOusesa1-mcircumferencereel.1.4Thistestmethodisfrequentlycombinedwiththedeterminationoflineardensitycarriedoutonthesameskeins.Specialprecautionsforreelingsuchskeinsarenoted.1.5Whereappropriate,thistestmethodstatesallrequirementsinSIunits.Thetraditionalunitsareinch-poundandareexactvalues.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_50
【页数】:8P.;A4
【正文语种】:
【英文标准名称】:StandardPracticeforLife-CycleCostAnalysisofPlasticPipeUsedforCulverts,StormSewers,andOtherBuriedConduits
【原文标准名称】:涵管、雨水管和其他地下管道用塑料管生命周期成本分析的标准实施规范
【标准号】:ASTMF1675-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:F17.62
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:costanalysis;discountrate;drainagesystem;engineeringeconomics;leastcost;life-cyclecost;materialservicelife;presentvalueanalysis;projectdesignlife
【摘要】:LCCanalysisisaneconomicmethodtoevaluatealternativesthatarecharacterizedbydifferingcashflowsoverthedesignatedprojectdesignlife.ThemethodentailscalculatingtheLCCofeachalternativecapableofsatisfyingthefunctionalrequirementsoftheprojectandcomparingthemtodeterminewhichhavethelowestestimatedLCCovertheprojectdesignlife.TheLCCmethodisparticularlysuitablefordeterminingwhetherthehigherinitialcostofanalternativeiseconomicallyjustifiedbyreductionsinfuturecosts(forexample,operatingmaintenance,rehabilitation,orreplacement)whencomparedtoanalternativewithlowerinitialcostsbuthigherfuturecosts.Ifadesignalternativehasbothalowerinitialcostandlowerfuturecoststhanotheralternatives,anLCCanalysisisnotnecessarytoshowtheformeristheeconomicallypreferablechoice.1.1Thispracticeestablishesaprocedureforusinglifecyclecost(LCC)analysistechniquestoevaluatealternativedrainagesystemdesigns,usingplasticpipethatsatisfythesamefunctionalrequirements.1.2TheLCCtechniquemeasuresthepresentvalueofallrelevantcoststoinstall,operate,andmaintainalternativedrainagesystemssuchasengineering,construction,maintenance,rehabilitation,orreplacementoveraspecifiedperiodoftime.Thepracticealsoaccommodatesanyremainingresidualorsalvagevalue.1.3Thedecisionmaker,usingtheresultsoftheLCCanalysis,canthenidentifythealternative(s)withthelowestestimatedtotalcostbasedonthepresentvalueofallcosts.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:03_100_50;23_040_20
【页数】:5P.;A4
【正文语种】:
