MIL-C-83867A, MILITARY SPECIFICATION: CONNECTOR, OXYGEN MASK HOSE, NON-EJECTION TYPE (03 JUN 1987) [S/S BY MIL-PRF-83867C]., This specification covers the non-ejection type mask hose connector assembly used in conjunction with the aviator oxygen mask or full-face fire fighter's mask.【英文标准名称】:StandardTestMethodforAcidNumberofPetroleumProductsbyPotentiometricTitration 【原文标准名称】:电位滴定法测定石油产品酸值的标准试验方法 【标准号】:ASTMD664-2009a 【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】:D02.06 【标准类型】:(TestMethod) 【标准水平】:() 【中文主题词】: 【英文主题词】:acidnumber;B5;B10;B20;B100;biodiesel;biodieselblend;lubricants;petroleumproducts;potentiometric;strongacidnumber;titration;Acidnumber--petroleumproducts;Lubricants(fluid);Neutralizationnumbers 【摘要】:Newandusedpetroleumproducts,biodieselandblendsofbiodieselmaycontainacidicconstituentsthatarepresentasadditivesorasdegradationproductsformedduringservice,suchasoxidationproducts.Therelativeamountofthesematerialscanbedeterminedbytitratingwithbases.Theacidnumberisameasureofthisamountofacidicsubstanceintheoil,alwaysundertheconditionsofthetest.Theacidnumberisusedasaguideinthequalitycontroloflubricatingoilformulations.Itisalsosometimesusedasameasureoflubricantdegradationinservice.Anycondemninglimitsmustbeempiricallyestablished.Sinceavarietyofoxidationproductscontributetotheacidnumberandtheorganicacidsvarywidelyincorrosionproperties,thetestmethodcannotbeusedtopredictcorrosivenessofoilorbiodieselandblendsunderserviceconditions.Nogeneralcorrelationisknownbetweenacidnumberandthecorrosivetendencyofbiodieselandblendsoroilstowardmetals.1.1Thistestmethodcoversproceduresforthedeterminationofacidicconstituentsinpetroleumproducts,lubricants,biodieselandblendsofbiodiesel.1.1.1TestMethodA8212;Forpetroleumproductsandlubricantssolubleornearlysolubleinmixturesoftolueneandpropan-2-ol.Itisapplicableforthedeterminationofacidswhosedissociationconstantsinwaterarelargerthan10-9;extremelyweakacidswhosedissociationconstantsaresmallerthan10-9donotinterfere.Saltsreactiftheirhydrolysisconstantsarelargerthan10-9.Therangeofacidnumbersincludedintheprecisionstatementis0.1mg/gKOHto150mg/gKOH.1.1.2TestMethodB8212;Developedspecificallyforbiodieselandbiodieselblendswithlowacidityandslightlydifferentsolubility.Thistestmethodrequirestheuseofanautomatictitratorwithautomaticendpointseekingcapability.Note18212;Innewandusedoils,theconstituentsthatmaybeconsideredtohaveacidiccharacteristicsincludeorganicandinorganicacids,esters,phenoliccompounds,lactones,resins,saltsofheavymetals,saltsofammoniaandotherweakbases,acidsaltsofpolybasicacids,andadditionagentssuchasinhibitorsanddetergents.1.2Thetestmethodmaybeusedtoindicaterelativechangesthatoccurinoilduringuseunderoxidizingconditionsregardlessofthecolororotherpropertiesoftheresultingoil.Althoughthetitrationismadeunderdefiniteequilibriumconditions,thetestmethodisnotintendedtomeasureanabsoluteacidicpropertythatcanbeusedtopredictperformanceofoilunderserviceconditions.Nogeneralrelationshipbetweenbearingcorrosionandacidnumberisknown.Note28212;TheacidnumberobtainedbythisstandardmayormaynotbenumericallythesameasthatobtainedinaccordancewithTestMethodsD974andD3339.Therehasnotbeenanyattempttocorrelatethismethodwithothernon-titrationmethods.Note38212;AfewlaboratorieshavemadetheobservationthatthereisadifferenceinTestMethodD664resultswhenaqueousversusnonaqueousbuffersareused.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,...... 【中国标准分类号】:E30 【国际标准分类号】:75_080 【页数】:10P.;A4 【正文语种】:英语