ASTM D2386-03
(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 acceptable metric units are to be regarded as the 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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An American National Standard
Designation:D2386–03
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* 3.1.1 freezing point, n—in aviation fuels, the fuel tempera-
ture at which solid hydrocarbon crystals, formed on cooling,
1.1 This test method covers the determination of the tem-
disappear when the temperature of the fuel is allowed to rise
perature below which solid hydrocarbon crystals may form in
under specified conditions of test.
aviation turbine fuels and aviation gasoline.
NOTE 1—The interlaboratory program that generated the precisions for 4. Significance and Use
this test method did not include aviation gasoline.
4.1 The freezing point of an aviation fuel is the lowest
1.2 The values stated in acceptable metric units are to be
temperature at which the fuel remains free of solid hydrocar-
regarded as the standard.
bon crystals that can restrict the flow of fuel through filters if
1.3 This standard does not purport to address all of the
presentinthefuelsystemoftheaircraft.Thetemperatureofthe
safety concerns, if any, associated with its use. It is the
fuel in the aircraft tank normally falls during flight depending
responsibility of the user of this standard to establish appro-
on aircraft speed, altitude, and flight duration. The freezing
priate safety and health practices and determine the applica-
point of the fuel must always be lower than the minimum
bility of regulatory limitations prior to use. For specific
operational tank temperature.
warning statements, see 5.4, Section 6, and 7.2.
4.2 Freezing point is a requirement in Specifications D910
and D1655.
2. Referenced Documents
5. Apparatus
2.1 ASTM Standards:
2
D910 Specification for Aviation Gasolines
5.1 Jacketed Sample Tube—A double-walled, unsilvered
2
D1655 Specification for Aviation Turbine Fuels
vessel, similar to a Dewar flask, the space between the inner
D3117 TestMethodforWaxAppearancePointofDistillate
and outer tube walls being filled at atmospheric pressure with
2
Fuels
dry nitrogen or air. The mouth of the sample tube shall be
3
E1 Specification for ASTM Thermometers
closed with a stopper supporting the thermometer and
E77 Test Method for Inspection and Verification of Ther-
moisture-proof collar through which the stirrer passes (Fig. 1).
3
mometers
5.2 Collars—Moisture-proof collars as shown in Fig. 2
2.2 IP Standard:
shall be used to prevent condensation of moisture.
4
IP Standards for Petroleum and Its Products, Part 1
5.3 Stirrer—Shall be made of 1.6-mm brass rod bent into a
smooth three-loop spiral at the bottom.
3. Terminology
NOTE 2—The stirrer may be mechanically actuated as described in the
3.1 Definitions of Terms Specific to This Standard:
apparatus section of Test Method D3117.
5.4 Vacuum Flask—An unsilvered vacuum flask
1
This test method is under the jurisdiction of ASTM Committee D02 on
(Warning—Implosion hazard) having the minimum dimen-
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
sionsshowninFig.1shallbeusedtoholdanadequatevolume
D02.07 on Flow Properties.
of cooling liquid and permit the necessary depth of immersion
Current edition approved May 10, 2003. Published May 2003. Originally
of the jacketed sample tube.
approved in 1965. Last previous edition approved in 2001 as D2386–01.
This test method has been approved by the sponsoring committees and accepted
5.5 Thermometer—A total immersion type, having a range
by the Cooperating Societies in accordance with established procedures.
from−80 to+20°C, designated as ASTM No. 114C/IP No.
2
Annual Book of ASTM Standards, Vol 05.01.
3
14C. (See Specification E1, or Appendix A, IP Standard
Annual Book of ASTM Standards, Vol 14.03.
4
Available from Institute of Petroleum (IP), 61 New Cavendish St., London,
WIG 7AR, U.K.
*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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D2386–03
FIG. 1 Freezing Point Apparatus
Thermometers, Volume 2, IP Standard Methods for Analysis 6.6 Liquid Nitrogen—A commercial or technical grade of
and Testing of Petroleum and Related Products.) liquid nitrogen is suitable for the cooling bath when the
freezing point is lower than−65°C. (Warning—Extremely
NOTE 3—The accuracy of this thermometer is to be checked in
cold, −196°C.)
a
...
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