ASTM D6426-04
(Test Method)Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils
Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils
SCOPE
1.1 This test method covers a procedure for determining the filterability of distillate fuel oils within the viscosity range from 1.70 to 6.20 mm²/s (cSt) at 40°C.
Note 1—ASTM specification fuels falling within the scope of this test method are Specification D 396 Grade Nos. 1 and 2, Specification D 975 Grades 1-D, low sulfur 1-D, 2-D, and low sulfur 2-D, and Specification D 2880 Grade Nos. 1-GT and 2-GT.
1.2 This test method is not applicable to fuels that contain undissolved water.
1.3 The values stated in SI units shall be considered 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.
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An American National Standard
Designation:D6426–04
Standard Test Method for
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Determining Filterability of Middle Distillate Fuel Oils
This standard is issued under the fixed designation D 6426; 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.
1. Scope* ADJ6300 D2PP, Version 4.43, Determination of Precision
and Bias Data for Use in Test Methods for Petroleum
1.1 This test method covers a procedure for determining the
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Products
filterabilityofdistillatefueloilswithintheviscosityrangefrom
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1.70 to 6.20 mm /s (cSt) at 40°C.
3. Terminology
NOTE 1—ASTM specification fuels falling within the scope of this test
3.1 Definitions of Terms Specific to This Standard:
method are Specification D 396 Grade Nos. 1 and 2, Specification D 975
3.1.1 For this test method, filterability is a measure of the
Grades 1-D, low sulfur 1-D, 2-D, and low sulfur 2-D, and Specification
rapidity with which a standard filter medium is plugged by
D 2880 Grade Nos. 1-GT and 2-GT.
insoluble matter in fuel and can be described in either of the
1.2 This test method is not applicable to fuels that contain
following two ways:
undissolved water.
3.1.1.1 filterability (by pressure)—the pressure drop across
1.3 The values stated in SI units shall be considered
a filter medium when 300 mL of fuel is passed at a rate of 20
standard.
mL/min.
1.4 This standard does not purport to address all of the
3.1.1.2 filterability (by volume)—the volume of fuel passed
safety concerns, if any, associated with its use. It is the
when104kPa(15psi)isreached.Thismethodofreportisused
responsibility of the user of this standard to establish appro-
when less than 300 mL passes at that pressure.
priate safety and health practices and determine the applica-
3.1.1.3 filterability quality factor (F-QF)—a value that de-
bility of regulatory limitations prior to use.
fines the filter plugging tendency of a fuel caused by particu-
late. The value is calculated using the volume and pressure
2. Referenced Documents
attained at the end of the test cycle. Depending on the outcome
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2.1 ASTM Standards:
of the test, two different equations are applied.
D 396 Specification for Fuel Oils
3.1.1.4 Discussion—Eq 1 is applied if the total sample was
D 975 Specification for Diesel Fuel Oils
discharged prior to reaching the maximum pressure or Eq 2 if
D 2880 Specification for Gas Turbine Fuel Oils
the maximum pressure was reached prior to discharging the
D 4057 Practice for Manual Sampling of Petroleum and
entire sample. The equations proportion the results so that a
Petroleum Products
continuous range of 0 – 100 is attained. Eq 1 yields values
D 4176 Test Method for Free Water and Particulate Con-
from 50 to 100, whereas Eq 2 yields values from 0 to 50.
tamination in Distillate Fuels (Visual Inspection Proce-
Higher values signify less particulate that can plug a filter of a
dures)
given pore size and porosity.
D 4177 Practice for Automatic Sampling of Petroleum and
(1) If the total sample (300 mL) is discharged prior to reaching the
Petroleum Products
maximum pressure (104 kPa or 15 psi), the F-QF is calculated by the
D 4860 Test Method for Free Water and Particulate Con-
following equation:
tamination in Mid-Distillate Fuels (Clear and Bright Nu-
F2QF 5 ~~15 psi 2 P !/15 psi!~50! 1 ~50! (1)
merical Rating) ~300 mL at P ~F! ~F!
E 1 Specification for ASTM Thermometers
where:
2.2 ASTM Adjuncts:
P = final pressure when the total sample (300 mL) was
(F)
discharged.
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(2) If the total sample is not discharged prior to reaching the
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee maximum pressure (104 kPa or 15 psi), the F-QF is calculated by the
D02.14 on Stability and Cleanliness of Liquid Fuels. following equation:
Current edition approved Nov. 1, 2004. Published November 2004. Originally
F2QF 5 V / 6 (2)
V F!at 15 psi! F!
~ ~ ~
approved in 1999. Last previous edition approved in 2002 as D 6426–02a.
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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
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Standards volume information, refer to the standard’s Document Summary page on Available from ASTM International Headquarters. Order Adjunct No.
the ASTM website. ADJD6300.
*A Summary of Changes section appears at the end of this standard.
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D6426–04
NOTE—Fuel flow from reservoir, through p
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