ASTMD2386-2003

Designation:D 2386-03An American Nafional StandardNTERNATIONALStandard Test Method forFreezing Point of Aviation Fuels1This standard is issued under the fixed designation D2386;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 Department of Defense.1.Scope*3.1.1 freezing point,n-in aviation fuels,the fuel tempera-1.1 This test method covers the determination of the tem-ture at which solid hydrocarbon crystals,formed on cooling,perature below which solid hydrocarbon crystals may form indisappear when the temperature of the fuel is allowed to riseaviation turbine fuels and aviation gasolineunder specifi ed conditions of test.NorE 1-The interlaboratory program that generated the precisions for4.Significance and Usethis test method did not include aviation gasoline4.1 The freezing point of an aviation fuel is the lowest1.2 The values stated in acceptable metric units are to betemperature at which the fuel remains free of solid hydrocar-regarded as the standard.bon crystals that can restrict the flow of fuel through filters if1.3 This standard does not purport to address all of thepresent in the fuel system of the aircraft.The temperature of thesafety concerns,if any,associated with its use.It is thefuel in the aircraft tank nommally falls during flight dependingresponsibility of the user of this standard to establish appro-on aircraft speed,altitude,and flight duration.The freezingpriate safety and health practices and determine the applica-point of the fuel must always be lower than the minimumbility of regulatory limitations prior to use.For specificoperational tank temperature.warning statements,see 5.4,Section 6,and 7.24.2 Freezing point is a requirement in Specifi cations D910and D 1655.2.Referenced Documents2.1 ASTM Standards:5.ApparatusD910 Specifi cation for Aviation Gasolines25.1 Jacketed Sample Tube-A double-walled,unsilveredD 1655 Specification for Aviation Turbine Fuels2vessel,similar to a Dewar flask,the space between the innerD 3117 Test Method for Wax Appearance Point of Distillateand outer tube walls being filled at atmospheric pressure withFuels2dry nitrogen or air.The mouth of the sample tube shall beE 1 Specifi cation for ASTM Thermometers3closed with a stopper supporting the thermometer andE77 Test Method for Inspection and Verifi cation of Ther-moisture-proof collar through which the stirrer passes(Fig.1).mometers35.2 Collars-Moisture-proof collars as shown in Fig.22.2 IP Standard:shall be used to prevent condensation of moisture.IP Standards for Petroleum and Its Products,Part 145.3 Stirrer-Shall be made of 1.6-mm brass rod bent into a3.Terminologysmooth three-loop spiral at the bottom.3.1 Definitions of Terms Specific to This Stand