ASTM D3241-09
(Test Method)Standard Test Method for Thermal Oxidation Stability of Aviation Turbine Fuels (JFTOT Procedure)
Standard Test Method for Thermal Oxidation Stability of Aviation Turbine Fuels (JFTOT Procedure)
SIGNIFICANCE AND USE
The test results are indicative of fuel performance during gas turbine operation and can be used to assess the level of deposits that form when liquid fuel contacts a heated surface that is at a specified temperature.
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 differential pressure values in mm Hg are defined only in terms of this test method.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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.
A1.1.1 This method covers a procedure for visually rating the heater tube produced by Test Method D 3241, JFTOT Procedure.
A1.1.2 The final result from this test method is a tube color rating based on an arbitrary scale established for this test method plus two additional yes/no criteria that indicate the presence of an apparent large excess of deposit or an unusual deposit, or both.
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An American National Standard
Designation:D3241–09
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 D3241; 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 (´) 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* Surface Texture: Profile Method—Nominal Characteris-
tics Of Contact (Stylus) Instruments
1.1 This test method covers the procedure for rating the
ISO 4288 Geometrical Product Specifications (GPS)—
tendencies of gas turbine fuels to deposit decomposition
Surface Texture: Profile Method—Rules And Procedures
products within the fuel system.
For The Assessment Of Surface Texture
1.2 The differential pressure values in mm Hg are defined
4
2.3 ASTM Adjuncts:
only in terms of this test method.
Color Standard for Tube Deposit Rating
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3. Terminology
standard.
3.1 Definitions of Terms Specific to This Standard:
1.4 This standard does not purport to address all of the
3.1.1 deposits—oxidative products laid down on the test
safety concerns, if any, associated with its use. It is the
area of the heater tube or caught in the test filter, or both.
responsibility of the user of this standard to establish appro-
3.1.1.1 Discussion—Fuel deposits will tend to predominate
priate safety and health practices and determine the applica-
at the hottest portion of the heater tube, which is between the
bility of regulatory limitations prior to use. For specific
30-mm and 50-mm position.
warning statements, see 6.1.1, 7.2, 7.2.1, 7.3, 11.1.1, and
3.1.2 heater tube—an aluminum coupon controlled at el-
Annex A3.
evated temperature, over which the test fuel is pumped.
2. Referenced Documents 3.1.2.1 Discussion—The tube is resistively heated and con-
2
trolled in temperature by a thermocouple positioned inside.
2.1 ASTM Standards:
The critical test area is the thinner portion, 60 mm in length,
D1655 Specification for Aviation Turbine Fuels
betweentheshouldersofthetube.Fuelinlettothetubeisatthe
D4306 Practice for Aviation Fuel Sample Containers for
0-mm position, and fuel exit is at 60 mm.
Tests Affected by Trace Contamination
3.2 Abbreviations:
E177 Practice for Use of the Terms Precision and Bias in
3.2.1 DP—differential pressure.
ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to
4. Summary of Test Method
Determine the Precision of a Test Method
3 4.1 This test method for measuring the high temperature
2.2 ISO Standards:
stability of gas turbine fuels uses the Jet Fuel Thermal
ISO 3274 Geometrical Product Specifications (GPS)—
Oxidation Tester (JFTOT) that subjects the test fuel to condi-
tions that can be related to those occurring in gas turbine
engine fuel systems. The fuel is pumped at a fixed volumetric
1
This test method is under the jurisdiction of ASTM Committee D02 on
flow rate through a heater, after which it enters a precision
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.J0.03 on Combustion and Thermal Properties.
stainless steel filter where fuel degradation products may
CurrenteditionapprovedJune1,2009.PublishedJuly2009.Originallyapproved
become trapped.
in 1973. Last previous edition approved in 2008 as D3241–08a. DOI: 10.1520/
4.1.1 The apparatus uses 450 mL of test fuel ideally during
D3241-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or a 2.5-h test. The essential data derived are the amount of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Available from International Organization for Standardization (ISO), 1 rue de Available from ASTM International Headquarters. Order Adjunct No.
Varembé, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch. ADJD3241. Original adjunct produced in 1986.
*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
---------------------- Page: 1 ----------------------
D3241–09
TABLE 1 Models of JFTOT
internal metal surfaces of apparatus before a test, especially
JFTOT User Pressurize Pump those surfaces (before the test section) that contact fresh
Differential Pressure By
Model Manual With Principle
sample. (Warning—Extremely flammable. Harmful if inhale
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:D3241–08a Designation:D3241–09
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 (´) 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*
1.1 Thistestmethodcoverstheprocedureforratingthetendenciesofgasturbinefuelstodepositdecompositionproductswithin
the fuel system.
1.2 The differential pressure values in mm Hg are defined only in terms of this test method.
1.3
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1655 Specification for Aviation Turbine Fuels
D 4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
E 177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3
2.2 ISO Standards:
ISO 3274 Geometrical Product Specifications (GPS)—Surface Texture: Profile Method—Nominal Characteristics Of Contact
(Stylus) Instruments
ISO 4288 Geometrical Product Specifications (GPS)—Surface Texture: Profile Method—Rules And Procedures For The
Assessment Of Surface Texture
4
2.3 ASTM Adjuncts:
Color Standard for Tube Deposit Rating
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 deposits—oxidative products laid down on the test area of the heater tube or caught in the test filter, or both.
3.1.1.1 Discussion—Fueldepositswilltendtopredominateatthehottestportionoftheheatertube,whichisbetweenthe30-mm
and 50-mm position.
3.1.2 heater tube—an aluminum coupon controlled at elevated temperature, over which the test fuel is pumped.
3.1.2.1 Discussion—The tube is resistively heated and controlled in temperature by a thermocouple positioned inside. The
critical test area is the thinner portion, 60 mm in length, between the shoulders of the tube. Fuel inlet to the tube is at the 0-mm
position, and fuel exit is at 60 mm.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.J0.03
on Combustion and Thermal Properties.
Current edition approved MarchJune 1, 2008.2009. PublishedApril 2008.July 2009. Originally approved in 1973. Last previous edition approved in 2008 as D 3241–08a.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from International Organization for Standardization (ISO), 1 rue de Varembé, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch.
4
Available from ASTM International Headquarters. Order Adjunct No. ADJD3241. Original adjunct produced in 1986.
*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
---------------------- Page: 1 ----------------------
D3241–09
3.2 Abbreviations:
3.2.1 DP—differential pressure.
4. Summary of Test Method
4.1 ThistestmethodformeasuringthehightemperaturestabilityofgasturbinefuelsusestheJetFuelThermalOxidationTester
(JFTOT) that subjects the test fuel to conditions that can be related to those occurring in gas turbine engine fuel systems. The fuel
is pumped at a fixed volumetric flow rate through a heater, after which it enters a precision stainless steel filter where fuel
degradation products may become trapped.
4.1.1 The apparatus uses 450 mL of test fuel ideally during a 2.5-h test. The essential data derived are the amount of deposits
on an aluminum he
...
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