ASTM D3241-08a

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 values stated in SI units are to be regarded as the standard. The 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: 29-Feb-2008
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.J0.03 - Combustion and Thermal Properties

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D3241–08a
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* Surface Texture: Profile Method—Rules And Procedures
For The Assessment Of Surface Texture
1.1 This test method covers the procedure for rating the
4
2.3 ASTM Adjuncts:
tendencies of gas turbine fuels to deposit decomposition
Color Standard for Tube Deposit Rating
products within the fuel system.
1.2 The differential pressure values in mm Hg are defined
3. Terminology
only in terms of this test method.
3.1 Definitions of Terms Specific to This Standard:
1.3 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,
D 1655 Specification for Aviation Turbine Fuels
betweentheshouldersofthetube.Fuelinlettothetubeisatthe
D 4306 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:
E 177 Practice for Use of the Terms Precision and Bias in
3.2.1 DP—differential pressure.
ASTM Test Methods
E 691 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-
Surface Texture: Profile Method—Nominal Characteris-
tions that can be related to those occurring in gas turbine
tics Of Contact (Stylus) Instruments
engine fuel systems. The fuel is pumped at a fixed volumetric
ISO 4288 Geometrical Product Specifications (GPS)—
flow rate through a heater, after which it enters a precision
stainless steel filter where fuel degradation products may
1
become trapped.
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
4.1.1 The apparatus uses 450 mL of test fuel ideally during
D02.J0.03 on Combustion and Thermal Properties.
a 2.5-h test. The essential data derived are the amount of
Current edition approved March 1, 2008. Published April 2008. Originally
deposits on an aluminum heater tube, and the rate of plugging
approved in 1973. Last previous edition approved in 2008 as D 3241–08.
2
of a 17 µm nominal porosity precision filter located just
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
downstream of the heater tube.
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

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D3241–08a
TABLE 1 Models of JFTOT
those surfaces (before the test section) that contact fresh
JFTOT User Pressurize Pump sample. (Warning—Extremely flammable. Harmful if inhaled
Differential Pressure By
Model Manual With Principle
(see Annex A3).)
A
202 202/203 nitrogen gear
...

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:D3241–08 Designation:D3241–08a
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*
1.1 Thistestmethodcoverstheprocedureforratingthetendenciesofgasturbinefuelstodepositdecompositionproductswithin
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.
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 ASTM Adjuncts: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
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.
CurrenteditionapprovedJan.15,March1,2008.PublishedFebruaryApril2008.Originallyapprovedin1973.Lastpreviouseditionapprovedin20062008asD 3241–068.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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. Original adjunct produced in 1986.
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
The following equipment (JFTOT) as described in Table 1 and RR: D02–1395, RR: D02–1396, and RR: D02–1397, was used to develop this test method, as provided
by Alcor Petroleum Instruments, 919 Isom, San Antonio, TX 78216. This is not an endorsement or certification by ASTM International.
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

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D3241–08a
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.
3.2 Abbreviations:
3.2.1 DP—differential pressure.
4. Summary of Test Method
4.1 ThistestmethodformeasuringthehightemperaturestabilityofgasturbinefuelsusestheJetFuelThermalOxidationTester
(JFTOT) that subjects the test fuel to cond
...