ASTM UOP863-2001 用气相色谱法测定Molex产品中微量脱着剂
时间:2024-05-04 03:22:56 来源: 标准资料网 作者：标准资料网 阅读：9425
【英文标准名称】:TraceDesorbentinC10-C18MolexProductsbyGC
【原文标准名称】:用气相色谱法测定Molex产品中微量脱着剂
【标准号】:ASTMUOP863-2001
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【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】:
【标准类型】:(UOP)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Molexisanadsorptiveseparationprocessthatseparatesnormalparaffinsfrombranchedchainandcyclichydrocarbons.ThismethodisfordeterminingtraceamountsofMolexdesorbent(n-pentane,isooctane,p-xylene)inC10-C18Molexproducts.Thelowerlimitofdetectionforn-pentaneandisooctaneis5mass-ppm.EarlyelutingMolexproductmaycauseinterferenceatthep-xylenesite.Therefore,thelowerlimitofdetectionforp-xylenecanbeashighas50mass-ppm.
【中国标准分类号】:
【国际标准分类号】:
【页数】:6P.;A4
【正文语种】:英语
Product Code:SAE AS3496
Title:Gasket - Type Xvi Engine Accessory Drive
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:No scope available.【英文标准名称】:StandardTestMethodforAmbientTemperatureFatigueLifeofMetallicBondedResistanceStrainGages
【原文标准名称】:金属粘合抗应变仪的环境温度疲劳寿命的标准试验方法
【标准号】:ASTME1949-2003(2009)
【标准状态】:现行
【国别】:美国
【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】:E28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Ambienttemperature;Bondedresistancestraingages;Fatigue;Metalfatiguetesting;Straingages
【摘要】:Straingagesarethemostwidelyuseddevicesformeasuringstrainsandforevaluatingstressesinstructures.Inmanyapplicationsthereareoftencyclicloadswhichcancausestraingagefailure.Performanceparametersofstraingagesareaffectedbyboththematerialsfromwhichtheyaremadeandtheirgeometricdesign.Thedeterminationofmoststraingageparametersrequiresmechanicaltestingthatisdestructive.Sincegagestestedforfatiguelifecannotbeusedagain,itisnecessarytotreatdatastatistically.Ingeneral,longerandwidergageswithlowerresistanceswillhavegreaterfatiguelife.Optionaladditionstogages(integralleadsareanexample)willoftenreducefatiguelife.Tobeused,straingagesmustbebondedtoastructure.Goodresults,particularlyinafatigueenvironment,dependheavilyonthematerialsusedtocleanthebondingsurface,tobondthegage,andtoprovideaprotectivecoating.Skilloftheinstallerisanothermajorfactorinsuccess.Finally,instrumentationsystemsmustbecarefullyselectedandcalibratedtoensurethattheydonotundulydegradetheperformanceofthegages.Thistestmethodencompassesonlyfullyreversedstraincycles.Fatiguefailureofastraingagemaynotinvolvevisiblecrackingorfractureofthegage,butmerelysufficientzeroshifttocompromisetheaccuracyofthegageoutputforstaticstraincomponents.1.1Thistestmethodcoversauniformprocedureforthedeterminationofstraingagefatiguelifeatambienttemperature.Asuggestedtestingequipmentdesignisincluded.1.2Thistestmethoddoesnotapplytoforcetransducersorextensometersthatusebondedresistancestraingagesassensingelements.1.3Straingagesarepartofacomplexsystemthatincludesstructure,adhesive,gage,leadwires,instrumentation,and(often)environmentalprotection.Asaresult,manythingsaffecttheperformanceofstraingages,includingusertechnique.Afurthercomplicationisthatstraingages,onceinstalled,normallycannotbereinstalledinanotherlocation.Therefore,itisnotpossibletocalibrateindividualstraingages;performancecharacteristicsarenormallypresentedonastatisticalbasis.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortoitsuse.
【中国标准分类号】:N62
【国际标准分类号】:19_060
【页数】:5P.;A4
【正文语种】:英语