ASTM_D_3241_-_20c.pdf

Designation:D324120cAn American National StandardDesignation 323/20Standard Test Method forThermal Oxidation Stability of Aviation Turbine Fuels1,2This 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 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific warning statements,see 6.1.1,7.1,7.3,12.1.1,andAnnex A6.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D1655 Specification for Aviation Turbine FuelsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4306 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:4ISO 3274 Geometrical Product Specifications(GPS)Surface texture:Profile methodNominal characteristicsof contact(stylus)instrumentsISO 4288 Geometrical Product Specifications(GPS)Surface texture:Profile methodRules and proceduresfor the assessment of surface texture2.3 ASTM Adjuncts:5Color Standard for Heater 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 heater tube is resistively heatedand controlled in temperature by a thermocouple positioned1This test method is under the jurisdiction of ASTM International CommitteeD02 on Petroleum Products,Liquid Fuels,and Lubricants and is the directresponsibility of Subcommittee D02.J0.03 on Combustion and Thermal Properties.The technically equivalent standard as referenced is under the jurisdiction of theEnergy Institute Subcommittee SC-B-8.Current edition approved Dec.1,2020.Published December 2020.Originallyapproved in 1973.Last previous edition approved in 2020 as D3241 20b.DOI:10.1520/D3241-20C.2This test method has been developed through the cooperative effort betweenASTM and the Energy Institute,London.ASTM and IP standards were approved byASTM and EI technical committees as being technically equivalent but that does notimply both standards are identical.3For 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.4Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,CP 56,CH-1211 Geneva 20,Switzerland,http:/www.iso.org.5Available 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1inside.The critical test area is the thinner portion,60 mm inlength,between the shoulders