ASTM D3241-05

Standard Test Method for Thermal Oxidation Stability of Aviation Turbine Fuels (JFTOT Procedure)

SCOPE
1.1 This test method covers the procedure for rating the tendencies of gas turbine fuels to deposit decomposition products within the fuel system.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound values given in parentheses are for information only. The differential pressure values in mm Hg are defined only in terms of this test method.
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 6.1.1, 7.2, 7.2.1, 7.3, 11.1.1, and Annex A3.

General Information

• Status: Historical
• Publication Date: 28-Feb-2005
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.J0 - Aviation Fuels

Relations

• Replaces: ASTM D3241-04 - Standard Test Method for Thermal Oxidation Stability of Aviation Turbine Fuels (JFTOT Procedure)
• Effective Date: 01-Mar-2005
• Replaced By: ASTM D3241-05a - Standard Test Method for Thermal Oxidation Stability of Aviation Turbine Fuels (JFTOT Procedure)
• Effective Date: 01-Jun-2005
• Referred By: ASTM D7223-21 - Standard Specification for Aviation Certification Turbine Fuel
• Effective Date: 01-Mar-2005
• Referred By: ASTM D6615-22 - Standard Specification for Jet B Wide-Cut Aviation Turbine Fuel
• Effective Date: 01-Mar-2005
• Referred By: ASTM D8147-17(2023) - Standard Specification for Special-Purpose Test Fuels for Aviation Compression-Ignition Engines
• Effective Date: 01-Mar-2005
• Referred By: ASTM D7671-21 - Standard Test Method for Corrosiveness to Silver by Automotive Spark–Ignition Engine Fuel–Silver Strip Method
• Effective Date: 01-Mar-2005
• Referred By: ASTM D7566-22a - Standard Specification for Aviation Turbine Fuel Containing Synthesized Hydrocarbons
• Effective Date: 01-Mar-2005
• Referred By: ASTM D5677-17 - Standard Specification for Fiberglass (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Pipe Fittings, Adhesive Bonded Joint Type, for Aviation Jet Turbine Fuel Lines
• Effective Date: 01-Mar-2005
• Referred By: ASTM D7667-21 - Standard Test Method for Determination of Corrosiveness to Silver by Automotive Spark-Ignition Engine Fuel—Thin Silver Strip Method
• Effective Date: 01-Mar-2005
• Referred By: ASTM D1655-23 - Standard Specification for Aviation Turbine Fuels
• Effective Date: 01-Mar-2005
• Referred By: ASTM D4054-23 - Standard Practice for Evaluation of New Aviation Turbine Fuels and Fuel Additives
• Effective Date: 01-Mar-2005
• Referred By: ASTM D6469-20 - Standard Guide for Microbial Contamination in Fuels and Fuel Systems
• Effective Date: 01-Mar-2005

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:D3241–05
Designation 323/99
Standard Test Method for
Thermal Oxidation Stability of Aviation Turbine Fuels
1
(JFTOT Procedure)
This standard is issued under the fixed designation D 3241; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number 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* Color Standard for Tube Deposit Rating
1.1 This test method covers the procedure for rating the
3. Terminology
tendencies of gas turbine fuels to deposit decomposition
3.1 Definitions of Terms Specific to This Standard:
products within the fuel system.
3.1.1 deposits—oxidative products laid down on the test
1.2 The values stated in SI units are to be regarded as the
area of the heater tube or caught in the test filter, or both.
standard. The inch-pound values given in parentheses are for
3.1.1.1 Discussion—Fuel deposits will tend to predominate
information only. The differential pressure values in mm Hg
at the hottest portion of the heater tube, which is between the
are defined only in terms of this test method.
30-mm and 50-mm position.
1.3 This standard does not purport to address all of the
3.1.2 heater tube—an aluminum coupon controlled at el-
safety concerns, if any, associated with its use. It is the
evated temperature, over which the test fuel is pumped.
responsibility of the user of this standard to establish appro-
3.1.2.1 Discussion—The tube is resistively heated and con-
priate safety and health practices and determine the applica-
trolled in temperature by a thermocouple positioned inside.
bility of regulatory limitations prior to use. For specific
The critical test area is the thinner portion, 60 mm in length,
warning statements, see 6.1.1, 7.2, 7.2.1, 7.3, 11.1.1, and
betweentheshouldersofthetube.Fuelinlettothetubeisatthe
Annex A3.
0-mm position, and fuel exit is at 60 mm.
2. Referenced Documents 3.2 Abbreviations:
2 3.2.1 D P—differential pressure.
2.1 ASTM Standards:
D 1655 Specification for Aviation Turbine Fuels
4. Summary of Test Method
D 4306 Practice for Aviation Fuel Sample Containers for
4.1 This test method for measuring the high temperature
Tests Affected by Trace Contamination
stability of gas turbine fuels uses the Jet Fuel Thermal
E 177 Practice for Use of the Terms Precision and Bias in
Oxidation Tester (JFTOT) that subjects the test fuel to condi-
ASTM Test Methods
tions that can be related to those occurring in gas turbine
E 691 Practice for Conducting an Interlaboratory Study to
engine fuel systems. The fuel is pumped at a fixed volumetric
Determine the Precision of a Test Method
3 flow rate through a heater, after which it enters a precision
2.2 ASTM Adjuncts:
stainless steel filter where fuel degradation products may
become trapped.
1
This test method is under the jurisdiction of ASTM Committee D02 on 4.1.1 The apparatus uses 450 mL of test fuel ideally during
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
a 2.5-h test. The essential data derived are the amount of
D02.J0 on Aviation Fuels.
deposits on an aluminum heater tube, and the rate of plugging
Current edition approved Mar. 1, 2005. Published March 2005. Originally
of a 17 µm nominal porosity precision filter located just
approved in 1973. Last previous edition approved in 2004 as D 3241 – 04.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
downstream of the heater tube.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Available from ASTM International Headquarters. Order Adjunct No.
ADJD3241.
*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.
1

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D3241–05
TABLE 1 Models of JFTOT
7.2.1 Use trisolvent (equal mix of acetone (1), toluene (2),
JFTOT User Pressurize Pump and isopropanol (3)) as a specific solvent to clean internal
Differential Pressure By
Model Manual With Principle
(working) surface of test section only. (Warning—(1) Ex-
A
202 202/203 nitrogen gear Hg Manometer; No Record
tremely flammable, vapors may cause flash fire; (2) and (3)
A
203 202/203 nitrogen gear Manometer + Graphical
Flammable.Vaporsofallthreeharmful.Irritatingtoskin,eyes,
Record
B
and mucous membranes.)
215 215 nitrogen gear Transducer + Printed
Record
7.3 Use dry calcium sulfate + cobalt chloride granules (97 +
C
2
...