ASTM_D_2392_-_15_2021.pdf

Designation:D239215(Reapproved 2021)Standard Test Method forColor of Dyed Aviation Gasolines1This standard is issued under the fixed designation D2392;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.Scope1.1 This test method covers the determination of the accept-ability of color of dyed aviation gasolines.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 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 Annex A1.1.4 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.Summary of Test Method2.1 The hue and color intensity of a sample of the gasolineto be tested are compared with those of glass permanent-colorstandards.3.Significance and Use3.1 Aviation gasolines are dyed different colors for easyidentification of grade,thus minimizing possibilities for fuelingaircraft with fuel of the wrong grade.4.Apparatus4.1 Color Comparator,split-field,for viewing simultane-ously(by transmitted light)the sample to be tested and thecombination of the reference liquid and the glass permanent-color standard.4.2 Fluid Tubes,of glass,200 mm viewing depth,with afused-on plane bottom plate.4.3 Plungers,Fluid Type,of polished optical glass.4.4 Aviation Gasoline Color Standards,2permanent-colorglass disks.5.Material5.1 The reference liquid can be either distilled water or asample of the gasoline to be tested before the addition of dyeor lead alkyl fluid.(WarningGasoline is extremely flam-mable.See A1.1 and A1.2.)6.Procedure6.1 Clean the optical surfaces of the color comparator.Insertthe empty fluid tubes in the comparator and adjust the positionof the light source until the intensities of the light from bothhalves of the comparator split-field are equal.6.2 Rinse and fill one of the tubes with the reference liquidto be used and insert the plunger.Wipe all excess referenceliquid from the outside of the tube and from the top of theplunger,and insert the tube on the left side of the comparator.6.3 Rinse and fill the other tube with the sample to be tested,and insert the plunger.Wipe all excess sample from the outsideof the tube and from the top of the plunger,and insert the tubein the right side of the comparator,so that it is directly belowthe larger of the two openings when the access door is closed.6.4 Insert the glass permanent-color standards into thecomparator and rotate the standards until the color section canbe viewed by transmitted light.Turn on the light source andcompare the two fields for hue and intensity with the minimumand maximum color sections of the glass permanent-colorstandards.6.5 Determine if the hue is approximately the same as thestandard and if the intensity of the color is between,orequivalent to,the minimum and maximum,in which case the1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.05 on Properties of Fuels,Petroleum Coke and Carbon Material.Current edition approved Jan.1,2021.Published February 2021.Originallyapproved in 1965.Last previous edition approved in 2015 as D2392 15.DOI:10.1520/D2392-15R21.2The sole source of supply of the apparatus known to the committee at this timeis Tintometer Ltd,Solar Way,Solstice Park,Salisbury,United Kingdom,SP47SZ.If you are aware of alternative suppliers,please provide this information to ASTMInternational Headquarters.Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.Copyright 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.1color of the sample is acceptable.If the hue is different fromthe standard or if the intensity lies outside the minimum andmaximum color sections,report the test as