ASTM_D_3241_-_16a.pdf

Designation:D324116aAn American National StandardDesignation 323/16Standard Test Method forThermal Oxidation Stability of Aviation Turbine Fuels1This standard is issued under the fixed designation D3241;the number immediately following the designation indicates the 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()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the procedure for rating thetendencies of gas turbine fuels to deposit decompositionproducts within the fuel system.1.2 The differential pressure values in mm Hg are definedonly in terms of this test method.1.3 The deposition values stated in SI units shall be re-garded as the referee value.1.4 The pressure values stated in SI units are to be regardedas standard.The psi comparison is included for operationalsafety with certain older instruments that cannot report pres-sure in SI units.1.5 No other units of measurement are included in thisstandard.1.6 WARNINGMercury has been designated by manyregulatory agencies as a hazardous material that can causecentral nervous system,kidney and liver damage.Mercury,orits vapor,may be hazardous to health and corrosive tomaterials.Caution should be taken when handling mercury andmercury containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAswebsitehttp:/www.epa.gov/mercury/faq.htmfor addi-tional information.Users should be aware that selling mercuryand/or mercury containing products into your state or countrymay be prohibited by law.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its 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.For specificwarning statements,see 6.1.1,7.2,7.2.1,7.3,11.1.1,andAnnex A5.2.Referenced Documents2.1 ASTM Standards:2D1655 Specification for Aviation Turbine FuelsD4306 Practice for Aviation Fuel Sample Containers forTests Affected by Trace ContaminationE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO Standards:3ISO 3274 Geometrical Product Specifications(GPS)Surface Texture:Profile MethodNominal Characteris-tics Of Contact(Stylus)InstrumentsISO 4288 Geometrical Product Specifications(GPS)Surface Texture:Profile MethodRules And ProceduresFor The Assessment Of Surface Texture2.3 ASTM Adjuncts:4Color Standard for Tube Deposit Rating3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 deposits,noxidative products laid down on the testarea of the heater tube or caught in the test filter,or both.3.1.1.1 DiscussionFuel deposits will tend to predominateat the hottest portion of the heater tube,which is between the30-mm and 50-mm position.3.1.2 heater tube,nan aluminum coupon controlled atelevated temperature,over which the test fuel is pumped.3.1.2.1 DiscussionThe tube is resistively heated and con-trolled in temperature by a thermocouple positioned inside.The critical test area is the thinner portion,60 mm in length,1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.J0.03 on Combustion and Thermal Properties.Current edition approved July 1,2016.Published July 2016.Originally approvedin 1973.Last previous edition approved in 2016 as D3241 16.DOI:10.1520/D3241-16A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,CP 56,CH-1211 Geneva 20,Switzerland,http:/www.iso.org.4Available from ASTM International Headquarters.Order Adjunct No.ADJD3241.Original adjunct produced in 1986.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 between the shoulders of the tube.Fuel inlet to the tube is at the0-mm position,and fuel exit is at 60 mm.3.2 Abbreviations:3.2.1 Pdifferential pressure.4.Summary of Test Method4.1 This test method for measuring the high temperaturestability of gas turbine fuels uses an instrument that subjectsthe test fuel to conditions that can be related to those occurringin gas turbine engine fuel systems.The fuel is pumped at afixed volumetric flow rate through a heater,after which itenters a precision stainless steel filter where fuel degradationproducts may become trapped.