ASTM D873-2002 Standard Test Method for Oxidation Stability of Aviation Fuels (Potential Residue Method)《航空燃料氧化稳定性的标准试验方法(潜在残留物方法)》.pdf
《ASTM D873-2002 Standard Test Method for Oxidation Stability of Aviation Fuels (Potential Residue Method)《航空燃料氧化稳定性的标准试验方法(潜在残留物方法)》.pdf》由会员分享,可在线阅读,更多相关《ASTM D873-2002 Standard Test Method for Oxidation Stability of Aviation Fuels (Potential Residue Method)《航空燃料氧化稳定性的标准试验方法(潜在残留物方法)》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 873 02Designation: 138/99An American National StandardBritish Standard 4456Standard Test Method forOxidation Stability of Aviation Fuels (Potential ResidueMethod)1This standard is issued under the fixed designation D 873; the number immediately following the designation indicates the
2、year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This test method has been approved by the sponsoring committees
3、 and accepted by the Cooperating Societies in accordance withestablished procedures.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method2covers the determination of thetendency of aviation reciprocating, turbine, and jet engine fuelsto form gu
4、m and deposits under accelerated aging conditions.(WarningThis test method is not intended for determiningthe stability of fuel components, particularly those with a highpercentage of low boiling unsaturated compounds, as thesemay cause explosive conditions within the apparatus.)NOTE 1For the measur
5、ement of the oxidation stability (inductionperiod) of motor gasoline, refer to Test Method D 525.1.2 The accepted SI unit of pressure is the kilo pascal (kPa);the accepted SI unit of temperature is C.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its
6、 use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:D 381 Test Method for Existent Gum in Fuels by JetEvaporation3D 525 Test
7、Method for Oxidation Stability of Gasoline(Induction Period Method)3D 4057 Practice for Manual Sampling of Petroleum andPetroleum Products4D 5452 Test Method for Particulate Contamination in Avia-tion Fuels by Laboratory Filtration5E 1 Specification for ASTM Thermometers63. Terminology3.1 Definition
8、s of Terms Specific to This Standard3.1.1 The following definitions of terms are all expressed interms of milligrams per 100 mL of sample, after “X” hoursaging, “X” being the accelerated aging (oxidation) period at100C.3.1.1.1 insoluble gumdeposit adhering to the glass samplecontainer after removal
9、of the aged fuel, precipitate, andsoluble gum. Insoluble gum is obtained by measuring theincrease in mass of the glass sample container.3.1.1.2 potential gumsum of the soluble and insolublegum.3.1.1.3 precipitatesediment and suspended material in theaged fuel, obtained by filtering the aged fuel and
10、 washingsfrom the glass sample container.3.1.1.4 soluble gumdeterioration products present at theend of a specific aging period. These deterioration productsexist in solution in the aged fuel and as the toluene-acetonesoluble portion of the deposit on the glass sample container.The soluble gum is ob
11、tained as a nonvolatile residue byevaporating the aged fuel and the toluene-acetone washingsfrom the glass sample container.3.1.1.5 total potential residuesum of the potential gumand the precipitate.4. Summary of Test Method4.1 The fuel is oxidized under prescribed conditions in apressure vessel fil
12、led with oxygen. The amounts of solublegum, insoluble gum, and precipitate formed are weighed.(WarningIn addition to other precautions, to provide pro-tection against the possibility of explosive rupture of the1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and
13、 Lubricants and is the direct responsibility of SubcommitteeD02.14 on Stability and Cleanliness of Liquid Fuels.Current edition approved Dec. 10, 2002. Published March 2003. Originallyapproved in 1946. Last previous edition approved in 1999 as D 87399a.2Further information can be found in the June 1
14、978, January 1979, and June1986 editions of the Institute of Petroleum Review.3Annual Book of ASTM Standards, Vol 05.01.4Annual Book of ASTM Standards, Vol 05.02.5Annual Book of ASTM Standards, Vol 05.03.6Annual Book of ASTM Standards, Vol 14.03.1Copyright ASTM International, 100 Barr Harbor Drive,
15、PO Box C700, West Conshohocken, PA 19428-2959, United States.pressure vessel, the pressure vessel should be operated behindan appropriate safety shield.)5. Significance and Use5.1 The results (of these tests) can be used to indicatestorage stability of these fuels. The tendency of fuels to formgum a
16、nd deposits in these tests has not been correlated withfield performance (and can vary markedly) with the formationof gum and deposits under different storage conditions.6. Apparatus6.1 Oxidation Pressure Vessel, Burst Disc Assembly, GlassSample Container and Cover, Accessories and Pressure Gage,as
17、described in the Annex to Test Method D 525. (WarningProvision shall be made to safely vent any expelled gases orflames away from the operator, other personnel, or flammablematerials as a safety precaution if the burst-disc ruptures.)NOTE 2Pressure vessels conforming to Test Method D 525/1980 areals
18、o suitable, but the specified burst-disc shall be attached. The burst discassembly shall be mechanically designed to ensure that it cannot beincorrectly fitted.6.2 Thermometer, having a range as shown below andconforming to the requirements as prescribed in SpecificationE 1, or specifications for IP
19、 thermometers:Thermometer Range Thermometer NumberASTM IP95 to 103C 22C 24CNOTE 3Other temperature sensing devices that cover the temperaturerange of interest, such as thermocouples or platinum resistance thermom-eters, that can provide equivalent or better accuracy and precision, may beused in plac
20、e of the thermometers specified in 6.2.6.3 Drying Oven, air oven maintained at 100 to 150C.6.4 Forceps, corrosion-resistant, steel.6.5 Filtering Crucible, sintered-glass, fine porosity.6.6 Oxidation Bath, as described in the Annex to TestMethod D 525. The liquid shall be water or a mixture ofethylen
21、e glycol and water, as required. The temperature can becontrolled thermostatically at 100 6 0.2C, or by maintainingit at its boiling point, which must be between 99.5 to 100.5C.If a liquid medium other than water is used, an appropriatemechanical stirrer/mixer shall be used to maintain uniformityof
22、the liquid bath at 100 6 0.2C. A non self-resettable deviceshall be fitted on all new baths to ensure that the heater isswitched off if the liquid bath falls below a safe level. Users ofolder baths without this device are strongly urged to have theequipment retrofitted to ensure safe operation.NOTE
23、4Electric heating blocks are known to be used. These blockscan have heating capacities, heating rates, and heat transfer characteristicsthat differ from those of a liquid bath. An electric heating block may beused in place of the liquid bath as long as the sample heating rate andsample temperature a
24、re demonstrated to be equivalent to that of the liquidbath.6.7 Cooling VesselA desiccator or other type of tightlycovered vessel for cooling the beakers before weighing. Theuse of a drying agent is not recommended.7. Reagents and Materials7.1 Gum SolventA mixture of equal volumes of tolueneand aceto
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