MIL-S-55562C, MILITARY SPECIFICATION, SHOP, ELECTRONIC, SEMITRAILER MOUNTED AN/ARM-189( ) AND AN/ASM-190 (31 MAR 1980)., This specification covers the modification of Semi-Trailers, Vans, Electronic, M373A2 and the installation of the applicable equipment and ancillary items into the modified vans to form Electronic Shops, Semi-Trailer Mounted, AN/ASM-189( ) and AN/ASM-190 ( ). (See 6.5)
基本信息
| 标准名称： | PN25铸钢法兰 |
| 中标分类： |
船舶 >>
船舶管路附件 >>
船用管件 |
| 发布日期： | |
| 实施日期： | 1981-07-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 3页 |
适用范围
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前言
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引用标准
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所属分类： 船舶 船舶管路附件 船用管件
【英文标准名称】:StandardTestMethodforConditionMonitoringofOxidationinIn-ServicePetroleumandHydrocarbonBasedLubricantsbyTrendAnalysisUsingFourierTransformInfrared(FT-IR)Spectrometry
【原文标准名称】:使用傅里叶变换红外(FT-R)光谱法通过趋势分析监控使用中的石油和碳氢化合物基润滑剂中的磷酸酯抗磨剂的氧化状态的标准试验方法
【标准号】:ASTMD7414-2009
【标准状态】:现行
【国别】:
【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】:D02.96
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:条件控制
【英文主题词】:conditionmonitoring;differentialtrendanalysis;directtrendanalysis;Fouriertransforminfrared;FT-IR;hydrocarbonbasedlubricants;in-servicepetroleumlubricants;infrared;IR;lubricants;oils;oxidation
【摘要】:Alargenumberofcompounds,suchasaldehydes,ketones,esters,andcarboxylicacids,areproducedwhenoilsreactwithatmosphericoxygen.OxidationismeasuredusingacommonFT-IRspectralfeaturebetween1800and1670cm-1causedbytheabsorptionofthecarbonylgrouppresentinmostoxidationcompounds.Theseoxidationproductsmayleadtoincreasedviscosity(causingoilthickeningproblems),acidity(causingacidiccorrosion),andformationofsludgeandvarnish(leadingtofilterplugging,foulingofcriticaloilclearancesandvalvefriction).Monitoringofoxidationproductsisthereforeanimportantparameterindeterminingoverallmachineryhealthandshouldbeconsideredinconjunctionwithdatafromothertestssuchasatomicemission(AE)andatomicabsorption(AA)spectroscopyforwearmetalanalysis(TestMethodD5185),physicalpropertytests(TestMethodsD445andD6304),basereserve(TestMethodD2896andD4739),acidnumbertests(TestMethodsD664andD974)andotherFT-IRoilanalysismethodsfornitration(PracticeE2412),sulfateby-products(TestMethodD7415),additivedepletion(TestMethodD7412),breakdownproductsandexternalcontaminants(PracticeE2412),whichalsoassesselementsoftheoilx2019;scondition,seeRefs(1-6).1.1Thistestmethodcoversmonitoringoxidationinin-servicepetroleumandhydrocarbonbasedlubricantssuchasindieselcrankcase,motor,hydraulic,gearandcompressoroils,aswellasothertypesoflubricantsthatarepronetooxidation.1.2ThistestmethodusesFourierTransformInfrared(FT-IR)spectrometryformonitoringbuild-upofoxidationproductsinin-servicepetroleumandhydrocarbonbasedlubricantsasaresultofnormalmachineryoperation.Petroleumandhydrocarbonbasedlubricantsreactwithoxygenintheairtoformanumberofdifferentchemicalspecies,includingaldehydes,ketones,esters,andcarboxylicacids.Thistestmethodisdesignedasafast,simplespectroscopiccheckformonitoringofoxidationinin-servicepetroleumandhydrocarbonbasedlubricantswiththeobjectiveofhelpingdiagnosetheoperationalconditionofthemachinebasedonmeasuringthelevelofoxidationintheoil.1.3AcquisitionofFT-IRspectraldataformeasuringoxidationinin-serviceoilandlubricantsamplesisdescribedinPracticeD7418.Inthistestmethod,measurementanddatainterpretationparametersforoxidationusingbothdirecttrendanalysisanddifferential(spectralsubtraction)trendanalysisarepresented.1.4Thistestmethodisbasedontrendingofspectralchangesassociatedwithoxidationofin-servicepetroleumandhydrocarbonbasedlubricants.Warningsoralarmlimitscanbesetonthebasisofafixedminimumvalueforasinglemeasurementor,alternatively,canbebasedonarateofchangeoftheresponsemeasured,seeRef(1).1.4.1Fordirecttrendanalysis,valuesarerecordeddirectlyfromabsorptionspectraandreportedinunitsofabsorbanceper0.1mmpathlength.1.4.2Fordifferentialtrendanalysis,valuesarerecordedfromthedifferentialspectra(spectrumobtainedbysubtractionoftheabsorptionspectrumofthereferenceoilfromthatofthein-serviceoil)andreportedinunitsof100*absorbanceper0.1mmpathlength(orequivalentlyabsorbanceunitspercentimetre).1.4.3Ineithercase,maintenanceactionlimitsshouldbedeterminedthroughstatisticalanalysis,historyofthesameorsimilarequipment,roundrobintestsorothermethodsinconjunctionwiththecorrelationofoxidationchangestoequipmentperformance.