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ASTM D5972-02

(Test Method)

Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)

Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)

SCOPE
1.1 This test method covers the determination of the temperature below which solid hydrocarbon crystals form in aviation turbine fuels.
1.2 This test method is designed to cover the temperature range of -80 to 20°C; however, the ASTM interlaboratory study mentioned in 12.4 has only demonstrated the test method with fuels having freezing points in the range of -45 to -65°C.
1.3 The user shall exercise appropriate caution when this test method is used in testing Jet B and JP 4 samples (see 12.3).
1.4 The values stated in SI units are to be regarded as the standard.
1.5 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 hazard statements see 7.1, 7.3, and 7.5.

General Information

Status
Historical
Publication Date
09-Apr-2002
ICS
49.025.99 - Other materials
75.160.20 - Liquid fuels
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.07 - Flow Properties
Current Stage
Ref Project

Relations

Replaces
ASTM D5972-99ae1 - Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)
Effective Date
10-Apr-2002
Replaced By
ASTM D5972-02e1 - Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)
Effective Date
10-Apr-2002
Referred By
ASTM D7826-23a - Standard Guide for Evaluation of New Aviation Gasolines and New Aviation Gasoline Additives
Effective Date
10-Apr-2002
Referred By
ASTM D7223-21 - Standard Specification for Aviation Certification Turbine Fuel
Effective Date
10-Apr-2002
Referred By
ASTM D4054-23 - Standard Practice for Evaluation of New Aviation Turbine Fuels and Fuel Additives
Effective Date
10-Apr-2002
Referred By
ASTM D1655-23 - Standard Specification for Aviation Turbine Fuels
Effective Date
10-Apr-2002
Referred By
ASTM D6615-22 - Standard Specification for Jet B Wide-Cut Aviation Turbine Fuel
Effective Date
10-Apr-2002
Referred By
ASTM D8147-17(2023) - Standard Specification for Special-Purpose Test Fuels for Aviation Compression-Ignition Engines
Effective Date
10-Apr-2002
Referred By
ASTM D7566-22a - Standard Specification for Aviation Turbine Fuel Containing Synthesized Hydrocarbons
Effective Date
10-Apr-2002
Referred By
ASTM D3699-19 - Standard Specification for Kerosine
Effective Date
10-Apr-2002
Referred By
ASTM D7960-21 - Standard Specification for Unleaded Aviation Gasoline Test Fuel Containing Non-hydrocarbon Components
Effective Date
10-Apr-2002

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ASTM D5972-02 - Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)ASTM D5972-02 - Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)
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ASTM D5972-02 - Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation:D5972–02
Designation: 435/98
Standard Test Method for
Freezing Point of Aviation Fuels (Automatic Phase
1
Transition Method)
This standard is issued under the fixed designation D5972; 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.
1. Scope followed by controlled warming and recording of the tempera-
ture at which the solid hydrocarbon crystals completely redis-
1.1 This test method covers the determination of the tem-
solve into the liquid phase.
perature below which solid hydrocarbon crystals form in
3.2.2 Peltier device, n—a solid-state thermoelectric device
aviation turbine fuels.
constructed with dissimilar semiconductor materials, config-
1.2 This test method is designed to cover the temperature
ured in such a way that it will transfer heat to and away from
range of −80 to 20°C; however, the ASTM interlaboratory
a test specimen dependent on the direction of electric current
studymentionedin12.4hasonlydemonstratedthetestmethod
applied to the device.
withfuelshavingfreezingpointsintherangeof−45to−65°C.
1.3 The user shall exercise appropriate caution when this
4. Summary of Test Method
testmethodisusedintestingJetBandJP4samples(see12.3).
4.1 A specimen is cooled at a rate of 15 6 5°C/min by a
1.4 The values stated in SI units are to be regarded as the
Peltier device while continuously being illuminated by a light
standard.
source.Thespecimeniscontinuouslymonitoredbyanarrayof
1.5 This standard does not purport to address all of the
optical detectors for the first formation of solid hydrocarbon
safety concerns, if any, associated with its use. It is the
crystals. Once the hydrocarbon crystals are formed, the speci-
responsibility of the user of this standard to establish appro-
men is then warmed at a rate of 10 + 0.5°C/min until the last
priate safety and health practices and determine the applica-
hydrocarbon crystals return to the liquid phase. The detectors
bility of regulatory limitations prior to use. For specific hazard
are sufficient in number to ensure that any solid hydrocarbon
statements see 7.1, 7.3, and 7.5.
crystals are detected. The specimen temperature at which the
2. Referenced Documents last hydrocarbon crystals return to the liquid phase is recorded
as the freezing point.
2.1 ASTM Standards:
2
D2386 Test Method for Freezing Point of Aviation Fuels
5. Significance and Use
3. Terminology 5.1 The freezing point of an aviation fuel is the lowest
temperature at which the fuel remains free of solid hydrocar-
3.1 Definitions:
boncrystals.Thesecrystalscanrestricttheflowoffuelthrough
3.1.1 freezing point, n—in aviation fuels, the fuel tempera-
the fuel system of the aircraft. The temperature of the fuel in
ture at which solid hydrocarbon crystals, formed on cooling,
theaircrafttanknormallydecreasesduringflightdependingon
disappear when the temperature of the fuel is allowed to rise
aircraft speed, altitude, and flight duration. The freezing point
under specified conditions of test.
ofthefuelmustalwaysbelowerthantheminimumoperational
3.2 Definitions of Terms Specific to This Standard:
fuel temperature.
3.2.1 automatic phase transition method, n—in this test
5.2 Petroleum blending operations require precise measure-
method, the procedures of automatically cooling a liquid
ment of the freezing point.
aviation fuel specimen until solid hydrocarbon crystals appear,
5.3 This test method produces results which have been
found to be equivalent to Test Method D2386 and expresses
1
This test method is under the jurisdiction of ASTM Committee D02 on
results to the nearest 0.1°C, with improved precision over Test
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
Method D2386. This test method also eliminates most of the
D02.07.0D on Wax-Related Viscometric Properties of Fuels and Oils.
operator time and judgment required by Test Method D2386.
Current edition approved April 10, 2002. Published July 2002. Originally
e1
published as D5972–96. Last previous edition D5972–99a .
2
Annual Book of ASTM Standards, Vol 05.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D5972–02
5.4 WhenspecificationrequiresTestMethodD2386,donot 8. Preparation of Apparatus
substitute this test method or any other test method.
8.1 Install the analyzer for operation in accordance with the
manufacturer’s instructions.
6. Apparatus
8.2 Turn on the liquid cooling medium and ensure its
3
6.1 Automatic Apparatus —This apparatus consists of a
te
...

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5.1 The freezing point of an aviation fuel is the lowest temperature at which the fuel remains free of solid hydrocarbon crystals. These crystals can restrict the flow of fuel through the fuel system of the aircraft. The temperature of the fuel in the aircraft tank normally decreases during flight depending on aircraft speed, altitude, and flight duration. The freezing point of the fuel must always be lower than the minimum operational fuel temperature.  
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1.1 This test method covers the determination of the temperature below which solid hydrocarbon crystals form in aviation turbine fuels.  
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