ASTM D8073-16
(Test Method)Standard Test Method for Determination of Water Separation Characteristics of Aviation Turbine Fuel by Small Scale Water Separation Instrument
Standard Test Method for Determination of Water Separation Characteristics of Aviation Turbine Fuel by Small Scale Water Separation Instrument
SIGNIFICANCE AND USE
5.1 This test method provides an indication of the presence of surfactants in aviation fuel. Like Test Methods D2550, D3602, D3948, and D7224, this test method can detect carryover traces of refinery treating residues in fuel as produced. In addition, these test methods can detect surface active substances added to or picked up by the fuel during handling from point of production to point of use. Certain additives can affect the WSI. Some of these substances affect the ability of filter separators to separate free water from the fuel.
5.2 The small scale water separation tester has a measurement range from 0.0 WSI to 100.0 WSI.
Note 1: WSI values greater than 100.0 WSI can be caused by a reduction in the light transmittance (see A1.1.5) of the test specimen due to material that was removed during the testing process.
5.3 This test method was developed so refiners, fuel terminal operators, pipelines, and independent testing laboratory personnel can rapidly and precisely measure for the presence of surfactants, with a minimum of training, in a wide range of locations.
SCOPE
1.1 This test method covers a procedure to rate the ability of aviation turbine fuels to release entrained and emulsified water when passed through a water-coalescing filter.
1.2 Results are expressed as a Water Separation Index (WSI).
1.3 The values stated in SI units are to be regarded as standard.
1.3.1 Exception—Units in WSI are included.
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.
General Information
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: D8073 − 16 An American National Standard
Standard Test Method for
Determination of Water Separation Characteristics of
Aviation Turbine Fuel by Small Scale Water Separation
1
Instrument
This standard is issued under the fixed designation D8073; 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.
1. Scope D4306 Practice for Aviation Fuel Sample Containers for
Tests Affected by Trace Contamination
1.1 Thistestmethodcoversaproceduretoratethe ability of
D7224 TestMethodforDeterminingWaterSeparationChar-
aviation turbine fuels to release entrained and emulsified water
acteristics of Kerosine-Type Aviation Turbine Fuels Con-
when passed through a water-coalescing filter.
taining Additives by Portable Separometer
1.2 Results are expressed as a Water Separation Index
(WSI).
3. Terminology
1.3 The values stated in SI units are to be regarded as
3.1 Definitions:
standard.
3.1.1 surfactant, n—in petroleum fuels, surface active ma-
1.3.1 Exception—Units in WSI are included.
terial (or surface active agent) that could disarm (deactivate)
1.4 This standard does not purport to address all of the
filter separator (coalescing) elements so that free water is not
safety concerns, if any, associated with its use. It is the
removed from the fuel in actual service.
responsibility of the user of this standard to establish appro-
3.1.1.1 Discussion—Technically, surfactants affect the inter-
priate safety and health practices and determine the applica-
facial tension between water and fuel, which affects the
bility of regulatory limitations prior to use.
tendency of water to coalesce into droplets.
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents
3.2.1 sonicator, n—a device that applies ultrasonic sound
2
2.1 ASTM Standards:
energy to the test specimen.
D1655 Specification for Aviation Turbine Fuels
3.2.1.1 Discussion—The sonicator is used to emulsify the
D2550 Method of Test for Water Separation Characteristics
water and aviation fuel.
3
of Aviation Turbine Fuels (Withdrawn 1989)
3.2.2 water separation index (WSI), n—a numerical rating
D3602 Test Method for Water Separation Characteristics of
indicating the ease of separating water from fuel by coales-
3
Aviation Turbine Fuels (Withdrawn 1994)
cence.
D3948 TestMethodforDeterminingWaterSeparationChar-
3.2.2.1 Discussion—A high WSI indicates a fuel that sepa-
acteristicsofAviationTurbineFuelsbyPortableSeparom-
rates water easily and is relatively free from surfactants.
eter
D4057 Practice for Manual Sampling of Petroleum and
4. Summary of Test Method
Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and 4.1 A fixed volume of test specimen is poured into the test
Petroleum Products beaker. The apparatus is purged with the test specimen. A
precise amount of water containing a specific dye is added to
the test beaker. The test specimen and dyed water are emulsi-
1 fied using a sonicator. The resulting emulsion is passed at a
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
constant rate directly to the detector, which is sensitive to the
Subcommittee D02.J0.05 on Fuel Cleanliness.
dye, to measure a reference value.The emulsion is then passed
Current edition approved Oct. 1, 2016. Published October 2016. DOI: 10.1520/
at the same constant rate to the detector by means of a filter
D8073-16.
2
cartridge that is designed to remove entrained water. Readings
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
from the detector are taken. The water separation
Standards volume information, refer to the standard’s Document Summary page on
characteristic, the Water Separation Index (WSI), is calculated
the ASTM website.
3
from the reference value and the detector readings. Results
The last approved version of this historical standard is referenced on
www.astm.org. range from 0.0 WSI to 100.0 WSI. A high value such as
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D8073 − 16
TABLE 1 Reference Fluid Dispersing Agent Concentrations
100.0 WSIindicatesatestspecimenthatcoalesceswatereasily
and that the test specimen is relatively free of surfactants. Concentration (mL/L) WSI
0 100.0
5. Significance and Use 0.2 97.6
0.4 79.8
5.1 This test method provides an indication of the presence
0.6 75.4
0.8 68.8
of surfactants in aviation
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