ASTM D3241-11
(Test Method)Standard Test Method for Thermal Oxidation Stability of Aviation Turbine Fuels
Standard Test Method for Thermal Oxidation Stability of Aviation Turbine Fuels
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 D3241.
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:D3241–11
Designation 323/99
Standard Test Method for
1
Thermal Oxidation Stability of Aviation Turbine Fuels
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* tics Of Contact (Stylus) Instruments
ISO 4288 Geometrical Product Specifications (GPS)—
1.1 This test method covers the procedure for rating the
Surface Texture: Profile Method—Rules And Procedures
tendencies of gas turbine fuels to deposit decomposition
For The Assessment Of Surface Texture
products within the fuel system.
4
2.3 ASTM Adjuncts:
1.2 The differential pressure values in mm Hg are defined
Color Standard for Tube Deposit Rating
only in terms of this test method.
1.3 The values stated in SI units are to be regarded as
3. Terminology
standard. No other units of measurement are included in this
3.1 Definitions of Terms Specific to This Standard:
standard.
3.1.1 deposits—oxidative products laid down on the test
1.4 This standard does not purport to address all of the
area of the heater tube or caught in the test filter, or both.
safety concerns, if any, associated with its use. It is the
3.1.1.1 Discussion—Fuel deposits will tend to predominate
responsibility of the user of this standard to establish appro-
at the hottest portion of the heater tube, which is between the
priate safety and health practices and determine the applica-
30-mm and 50-mm position.
bility of regulatory limitations prior to use. For specific
3.1.2 heater tube—an aluminum coupon controlled at el-
warning statements, see 6.1.1, 7.2, 7.2.1, 7.3, 11.1.1, and
evated temperature, over which the test fuel is pumped.
Annex A3.
3.1.2.1 Discussion—The tube is resistively heated and con-
2. Referenced Documents trolled in temperature by a thermocouple positioned inside.
2
The critical test area is the thinner portion, 60 mm in length,
2.1 ASTM Standards:
betweentheshouldersofthetube.Fuelinlettothetubeisatthe
D1655 Specification for Aviation Turbine Fuels
0-mm position, and fuel exit is at 60 mm.
D4306 Practice for Aviation Fuel Sample Containers for
3.2 Abbreviations:
Tests Affected by Trace Contamination
3.2.1 DP—differential pressure.
E177 Practice for Use of the Terms Precision and Bias in
ASTM Test Methods
4. Summary of Test Method
E691 Practice for Conducting an Interlaboratory Study to
4.1 This test method for measuring the high temperature
Determine the Precision of a Test Method
3 stability of gas turbine fuels uses an instrument that subjects
2.2 ISO Standards:
the test fuel to conditions that can be related to those occurring
ISO 3274 Geometrical Product Specifications (GPS)—
in gas turbine engine fuel systems. The fuel is pumped at a
Surface Texture: Profile Method—Nominal Characteris-
fixed volumetric flow rate through a heater, after which it
enters a precision 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.J0.03 on Combustion and Thermal Properties.
Current edition approved Sept. 1, 2011. Published September 2011. Originally deposits on an aluminum heater tube, and the rate of plugging
´1
approved in 1973. Last previous edition approved in 2009 as D3241–09 . DOI:
of a 17 µm nominal porosity precision filter located just
10.1520/D3241-11.
downstream of the heater tube.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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, ch. de Available from ASTM International Headquarters. Order Adjunct No.
la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http://www.iso.org. 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 ----------------------
D3241–11
TABLE 1 Instrument Models
those surfaces (before the test section) that contact fresh
Instrument User Pressurize Pump sample. (Warning—Extremely flammable. Harmful if in
...
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
´1
Designation:D3241–09 Designation:D3241–11
Designation 323/99
Standard Test Method for
1
Thermal Oxidation Stability of Aviation Turbine Fuels
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
´ NOTE—Removed all instances of the acronym for Jet Fuel Thermal Oxidation Tester editorially in April 2010.
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 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:
D1655 Specification for Aviation Turbine Fuels
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 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.
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 June 1, 2009. Published July 2009. Originally approved in 1973. Last previous edition approved in 2008 as D3241–08a. DOI:
10.1520/D3241-09E01.
´1
Current edition approved Sept. 1, 2011. Published September 2011. Originally approved in 1973. Last previous edition approved in 2009 as D3241–09 . DOI:
10.1520/D3241-11.
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.
3
Available from International Organization for Standardization (ISO), 1, ch. de la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http://www.iso.org.
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 ----------------------
D3241–11
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.
3.2 Abbreviations:
3.2.1 DP—differential pressure.
4. Summary of Test Method
4.1 This test method for measuring the high temperature stability of gas turbine fuels uses an instrument that subjects the test
fuelto
...
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