ASTM D2386-05
(Test Method)Standard Test Method for Freezing Point of Aviation Fuels
Standard Test Method for Freezing Point of Aviation Fuels
SCOPE
1.1 This test method covers the determination of the temperature below which solid hydrocarbon crystals may form in aviation turbine fuels and aviation gasoline.
Note 1—The interlaboratory program that generated the precisions for this test method did not include aviation gasoline.
1.2 The values stated in SI units are to be regarded as standard. No other values of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see 5.4, Section 6, and 7.2.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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An American National Standard
Designation:D2386–05
Standard Test Method for
1
Freezing Point of Aviation Fuels
This standard is issued under the fixed designation D2386; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) 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. Terminology
1.1 This test method covers the determination of the tem- 3.1 Definitions of Terms Specific to This Standard:
perature below which solid hydrocarbon crystals may form in 3.1.1 freezing point, n—in aviation fuels, the fuel tempera-
aviation turbine fuels and aviation gasoline. ture at which solid hydrocarbon crystals, formed on cooling,
disappear when the temperature of the fuel is allowed to rise
NOTE 1—The interlaboratory program that generated the precisions for
under specified conditions of test.
this test method did not include aviation gasoline.
1.2 The values stated in SI units are to be regarded as
4. Significance and Use
standard. No other units of measurement are included in this
4.1 The freezing point of an aviation fuel is the lowest
standard.
temperature at which the fuel remains free of solid hydrocar-
1.3 This standard does not purport to address all of the
bon crystals that can restrict the flow of fuel through filters if
safety concerns, if any, associated with its use. It is the
presentinthefuelsystemoftheaircraft.Thetemperatureofthe
responsibility of the user of this standard to establish appro-
fuel in the aircraft tank normally falls during flight depending
priate safety and health practices and determine the applica-
on aircraft speed, altitude, and flight duration. The freezing
bility of regulatory limitations prior to use. For specific
point of the fuel must always be lower than the minimum
warning statements, see 5.4, Section 6, and 7.2.
operational tank temperature.
4.2 Freezing point is a requirement in Specifications D910
2. Referenced Documents
and D1655.
2
2.1 ASTM Standards:
D910 Specification for Aviation Gasolines
5. Apparatus
D1655 Specification for Aviation Turbine Fuels
5.1 Jacketed Sample Tube—A double-walled, unsilvered
D3117 TestMethodforWaxAppearancePointofDistillate
vessel, similar to a Dewar flask, the space between the inner
Fuels
and outer tube walls being filled at atmospheric pressure with
E1 Specification forASTM Liquid-in-GlassThermometers
dry nitrogen or air. The mouth of the sample tube shall be
E77 Test Method for Inspection and Verification of Ther-
closed with a stopper supporting the thermometer and
mometers
moisture-proof collar through which the stirrer passes (Fig. 1).
2.2 Energy Institute Standard:
5.2 Collars—Moisture-proof collars as shown in Fig. 2
3
IP Standards for Petroleum and Its Products, Part 1
shall be used to prevent condensation of moisture.
5.3 Stirrer—Shall be made of 1.6-mm brass rod bent into a
smooth three-loop spiral at the bottom.
1
This test method is under the jurisdiction of ASTM Committee D02 on
NOTE 2—The stirrer may be mechanically actuated as described in the
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
apparatus section of Test MethodD3117.
D02.07 on Flow Properties.
Current edition approved July 1, 2005. Published August 2005. Originally 5.4 Vacuum Flask—An unsilvered vacuum flask
approved in 1965. Last previous edition approved in 2003 as D2386–03.
(Warning—Implosion hazard) having the minimum dimen-
This test method has been approved by the sponsoring committees and accepted
sionsshowninFig.1shallbeusedtoholdanadequatevolume
by the Cooperating Societies in accordance with established procedures.
2
of cooling liquid and permit the necessary depth of immersion
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
of the jacketed sample tube.
Standards volume information, refer to the standard’s Document Summary page on
5.5 Thermometer—A total immersion type, having a range
the ASTM website.
3 from −80 to +20°C, designated as ASTM No. 114C/IP No.
Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
U.K. 14C. (See Specification E1, or Appendix A, IP Standard
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2386–05
FIG. 1 Freezing Point Apparatus
Thermometers, Volume 2, IP Standard Methods for Analysis liberates gases that can cause suffocation. Contact with skin
and Testing of P
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