1、Designation:D324022aStandard Test Method forUndissolved Water In Aviation Turbine Fuels1This standard is issued under the fixed designation D3240;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 p
2、arentheses 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 measurement of undissolvedwater in a
3、viation turbine fuels in flowing fuel streams withoutexposing the fuel sample to the atmosphere or to a samplecontainer.The usual range of test readings covers from 1 ppmto 60 ppm of free water.This test method does not detect waterdissolved in the fuel,and thus test results for comparable fuelstrea
4、ms can vary with fuel temperature and the degree of watersolubility in the fuel.1.2 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 practi
5、ces and deter-mine the applicability of regulatory limitations prior to use.1.3 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 R
6、ecom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D4175 Terminology Relating to Petroleum Products,LiquidFuels,and Lubricants3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,re
7、ferto Terminology D4175.3.2 Definitions of Terms Specific to This Standard:3.2.1 free water,nwater not dissolved in the fuel.3.2.2 Free Water Independent of Pad Reader(FWIPR),nacalculated result which provides free water independent of testpad reader used for measurement.FWIPR equations weredevelope
8、d from the 2011 ILS data.34.Summary of Test Method4.1 A measured sample of fuel is passed through as uraninedye-treated filter pad.Undissolved(free)water in the fuel willreact with the uranine dye.When the pad is subsequentlyilluminated by ultraviolet(UV)light,the dye previouslycontacted by free wat
9、er will fluoresce a bright yellow with thebrightness increasing for increasing amounts of free water inthe fuel.The light-illuminated pad is compared to a knownstandard using a photocell comparator,and the free water in thefuel sample is read out in parts per million by volume.Byvarying the fuel sam
10、ple size,the range of the test method canbe increased.5.Significance and Use5.1 Undissolved(free)water in aviation fuel can encouragethe growth of microorganisms and subsequent corrosion in thetanks of aircraft and can also lead to icing of filters in the fuelsystem.Control of free water is exercise
11、d in ground fuelingequipment by use of filter-coalescers and water separators.6.Apparatus6.1 Test Pad Rater(UV Source Device)A device4,5,6,7forcomparing the fluorescence of the test pad to a known standard,while both are illuminated by the same source of UV light,shall be used.The amount of UV light
12、 striking the standardshall be modulated until the total fluorescence of the test pad1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.J0.05 on Fuel Cleanliness.Current edition approv
13、ed July 1,2022.Published September 2022.Originallyapproved in 1973.Last previous edition approved in 2022 as D3240 22.DOI:10.1520/D3240-22A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume in
14、formation,refer to the standards Document Summary page onthe ASTM website.3Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D02-1804.ContactASTM CustomerService at serviceastm.org.4The Aqua-Glo Series II instrument manufactured by
15、 Gammon TechnicalProducts,Inc.,P.O.Box 400,Manasquan,NJ 08736-0400 was used in the originalprecision test program(RR:D02-1195).The unit is currently available in a Series Vconfiguration,which is changed only in the power supply.All water contentmeasuring components remain of the same configuration a
16、s the Series II instrument.Manufacturers who wish to offer similar products are referred to Committee D02Equipment Replacement Guidelines.5The sole source of supply of the apparatus known to the committee at this timeis Gammon Technical Products Inc.,P.O.Box 400,Manasquan,NJ 08736-0400.*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 develope