ASTM D2624-22
(Test Method)Standard Test Methods for Electrical Conductivity of Aviation and Distillate Fuels
Standard Test Methods for Electrical Conductivity of Aviation and Distillate Fuels
SIGNIFICANCE AND USE
5.1 The ability of a fuel to dissipate charge that has been generated during pumping and filtering operations is controlled by its electrical conductivity, which depends upon its content of ion species. If the conductivity is sufficiently high, charges dissipate fast enough to prevent their accumulation and dangerously high potentials in a receiving tank are avoided.
SCOPE
1.1 These test methods cover the determination of the electrical conductivity of aviation and distillate fuels with and without a static dissipator additive. The test methods normally give a measurement of the conductivity when the fuel is uncharged, that is, electrically at rest (known as the rest conductivity).
1.2 Two test methods are available for field tests of fuel conductivity. These are: (1) portable meters for the direct measurement in tanks or the field or laboratory measurement of fuel samples, and (2) in-line meters for the continuous measurement of fuel conductivities in a fuel distribution system. In using portable meters, care must be taken in allowing the relaxation of residual electrical charges before measurement and in preventing fuel contamination.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see 7.1, 7.1.1, and 11.2.1.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D2624 − 22
Designation: 274/18
Standard Test Methods for
1,2
Electrical Conductivity of Aviation and Distillate Fuels
This standard is issued under the fixed designation D2624; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 These test methods cover the determination of the
electrical conductivity of aviation and distillate fuels with and
2. Referenced Documents
without a static dissipator additive. The test methods normally
3
give a measurement of the conductivity when the fuel is 2.1 ASTM Standards:
uncharged, that is, electrically at rest (known as the rest D4306Practice for Aviation Fuel Sample Containers for
conductivity). Tests Affected by Trace Contamination
D4308Test Method for Electrical Conductivity of Liquid
1.2 Two test methods are available for field tests of fuel
Hydrocarbons by Precision Meter
conductivity. These are: (1) portable meters for the direct
measurementintanksorthefieldorlaboratorymeasurementof
3. Terminology
fuel samples, and (2) in-line meters for the continuous mea-
surementoffuelconductivitiesinafueldistributionsystem.In 3.1 Definitions:
using portable meters, care must be taken in allowing the 3.1.1 picosiemens per metre, n—the unit of electrical con-
relaxation of residual electrical charges before measurement ductivity is also called a conductivity unit (CU). A siemen is
and in preventing fuel contamination. the SI definition of reciprocal ohm sometimes called mho.
212 21 21
1.3 The values stated in SI units are to be regarded as 1 pS/m 51 310 Ω m 51cu 51 picomho/m (1)
standard. No other units of measurement are included in this
3.1.2 rest conductivity, n—thereciprocaloftheresistivityof
standard.
uncharged fuel in the absence of ionic depletion or polariza-
1.4 This standard does not purport to address all of the tion.
3.1.2.1 Discussion—It is the electrical conductivity at the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- initial instant of current measurement after a dc voltage is
impressed between electrodes, or a measure of the average
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. current when an alternating current (ac) voltage is impressed.
For specific precautionary statements, see 7.1, 7.1.1, and
11.2.1. 4. Summary of Test Methods
1.5 This international standard was developed in accor-
4.1 Avoltageisappliedacrosstwoelectrodesinthefueland
dance with internationally recognized principles on standard-
the resulting current expressed as a conductivity value. With
ization established in the Decision on Principles for the
portable meters, the current measurement is made almost
Development of International Standards, Guides and Recom-
instantaneously upon application of the voltage to avoid errors
duetoiondepletion.Iondepletionorpolarizationiseliminated
1
These test methods are under the jurisdiction ofASTM International Commit- in dynamic monitoring systems by continuous replacement of
tee D02 on Petroleum Products, Liquid Fuels, and Lubricants and are the direct
thesampleinthemeasuringcell,orbytheuseofanalternating
responsibility of ASTM Subcommittee D02.J0.04 on Additives and Electrical
voltage. The procedure, with the correct selection of electrode
Properties. The technically equivalent standard as referenced is under the jurisdic-
size and current measurement apparatus, can be used to
tion of the Energy Institute Subcommittee SC-B-8.
Current edition approved Oct. 1, 2022. Published November 2022. Originally
approved in 1967. Last previous edition approved in 2021 as D2624–21a. DOI:
10.1520/D2624-22.
2 3
Thesetestmethodshavebeendevelopedthroughthecooperativeeffortbetween For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ASTMandtheEnergyInstitute,London.ASTMandIPstandardswereapprovedby contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ASTMandEItechnicalcommitteesasbeingtechnicallyequivalentbutthatdoesnot Standards volume information, refer to the standard’s Document Summary page on
imply both standards are identical. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright ©
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
Designation: D2624 − 21a D2624 − 22
Designation: 274/18
Standard Test Methods for
1,2
Electrical Conductivity of Aviation and Distillate Fuels
This standard is issued under the fixed designation D2624; 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 U.S. Department of Defense.
1. Scope*
1.1 These test methods cover the determination of the electrical conductivity of aviation and distillate fuels with and without a
static dissipator additive. The test methods normally give a measurement of the conductivity when the fuel is uncharged, that is,
electrically at rest (known as the rest conductivity).
1.2 Two test methods are available for field tests of fuel conductivity. These are: (1) portable meters for the direct measurement
in tanks or the field or laboratory measurement of fuel samples, and (2) in-line meters for the continuous measurement of fuel
conductivities in a fuel distribution system. In using portable meters, care must be taken in allowing the relaxation of residual
electrical charges before measurement and in preventing fuel contamination.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. For specific precautionary statements, see 7.1, 7.1.1, and 11.2.1.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
D4308 Test Method for Electrical Conductivity of Liquid Hydrocarbons by Precision Meter
3. Terminology
3.1 Definitions:
1
These test methods are under the jurisdiction of ASTM International Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and are the direct responsibility
of ASTM Subcommittee D02.J0.04 on Additives and Electrical Properties. The technically equivalent standard as referenced is under the jurisdiction of the Energy Institute
Subcommittee SC-B-8.
Current edition approved Oct. 1, 2021Oct. 1, 2022. Published November 2021November 2022. Originally approved in 1967. Last previous edition approved in 2021 as
D2624 – 21.D2624 – 21a. DOI: 10.1520/D2624-21A.10.1520/D2624-22.
2
These test methods have been developed through the cooperative effort between ASTM and the Energy Institute, London. ASTM and IP standards were approved by
ASTM and EI technical committees as being technically equivalent but that does not imply both standards are identical.
3
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.
*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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D2624 − 22
3.1.1 picosiemens per metre, n—the unit of electrical conductivity is also called a conductivity unit (CU). A siemen is the SI
definition of reciprocal ohm sometimes called mho.
212 21 21
1 pS/m5 1310 Ω m 5 1 cu 5 1 picomho/m (1)
3.1.2 rest conductivity, n—the reciprocal of the resistivity of uncharged fuel in the absence of ionic depletion or polarization.
3.1.2.1 Discussion—
It is the electrical conductivity at the initial instant of current measurement after a dc voltage is impressed between electrodes, or
a measure of the average current when an alternating current (ac) voltage is impressed.
4. Summary of Test Methods
4.1 A voltage is applied across two electrodes in the fuel and the resulting current expressed as a conductivity
...
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