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ASTM D5972-99ae1

(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-Dec-1999
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

Replaced By
ASTM D5972-02 - Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)
Effective Date
10-Apr-2002

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ASTM D5972-99ae1 - Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)ASTM D5972-99ae1 - Standard Test Method for Freezing Point of Aviation Fuels (Automatic Phase Transition Method)
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ASTM D5972-99ae1 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
ε1
Designation:D5972–99a
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 (ε) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Note 1 was updated and Note 2 was included editorially in November 2001.
1. Scope aviation fuel specimen until solid hydrocarbon crystals appear,
followed by controlled warming and recording of the tempera-
1.1 This test method covers the determination of the tem-
ture at which the solid hydrocarbon crystals completely redis-
perature below which solid hydrocarbon crystals form in
solve into the liquid phase.
aviation turbine fuels.
3.3.2 Peltier device, n—a solid-state thermoelectric device
1.2 This test method is designed to cover the temperature
constructed with dissimilar semiconductor materials, config-
range of −80 to 20°C; however, the ASTM interlaboratory
ured in such a way that it will transfer heat to and away from
studymentionedin12.4hasonlydemonstratedthetestmethod
a test specimen dependent on the direction of electric current
withfuelshavingfreezingpointsintherangeof−45to−65°C.
applied to the device.
1.3 The user shall exercise appropriate caution when this
testmethodisusedintestingJetBandJP4samples(see12.3).
4. Summary of Test Method
1.4 The values stated in SI units are to be regarded as the
4.1 A specimen is cooled at a rate of 156 5°C/min by a
standard.
Peltier device while continuously being illuminated by a light
1.5 This standard does not purport to address all of the
source.Thespecimeniscontinuouslymonitoredbyanarrayof
safety concerns, if any, associated with its use. It is the
optical detectors for the first formation of solid hydrocarbon
responsibility of the user of this standard to establish appro-
crystals. Once the hydrocarbon crystals are formed, the speci-
priate safety and health practices and determine the applica-
men is then warmed at a rate of 10 + 0.5°C/min until the last
bility of regulatory limitations prior to use. For specific hazard
hydrocarbon crystals return to the liquid phase. The detectors
statements see 7.1, 7.3, and 7.5.
are sufficient in number to ensure that any solid hydrocarbon
2. Referenced Documents crystals are detected. The specimen temperature at which the
last hydrocarbon crystals return to the liquid phase is recorded
2.1 ASTM Standards:
2 as the freezing point.
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
3.1 Definitions:
temperature at which the fuel remains free of solid hydrocar-
3.2 freezing point, n—in aviation fuels,thefueltemperature
boncrystals.Thesecrystalscanrestricttheflowoffuelthrough
at which solid hydrocarbon crystals, formed on cooling,
the fuel system of the aircraft. The temperature of the fuel in
disappear when the temperature of the fuel is allowed to rise.
theaircrafttanknormallydecreasesduringflightdependingon
3.3 Definitions of Terms Specific to This Standard:
aircraft speed, altitude, and flight duration. The freezing point
3.3.1 automatic phase transition method, n—in this test
ofthefuelmustalwaysbelowerthantheminimumoperational
method, the procedures of automatically cooling a liquid
fuel temperature.
5.2 Petroleum blending operations require precise measure-
1
This test method is under the jurisdiction of ASTM Committee D02 on
ment of the freezing point.
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.07.0D on Wax-Related Viscometric Properties of Fuels and Oils. 5.3 This test method produces results which have been
Current edition approved Dec. 10, 1999. Published January 2000. Originally
found to be equivalent to Test Method D2386 and expresses
published as D 5972 — 96. Last previous edition D 5972 — 99.
results to the nearest 0.1°C, with improved precision over Test
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 ----------------------
ε1
D5972–99a
Method D2386. This test method also eliminates most of the 8. Preparation of Apparatus
operator time and judgment required by Test Method D2386.
8.1 Install the analyzer for operation in accordance with the
5.4 WhenspecificationrequiresTestMethodD2386,donot
manufacturer’s instructions.
substitute this test method or any other test method.
8.2 Turn on the liquid cooling medium and ensure its
temperature is appro
...

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

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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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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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