ASTM D6426-02

Standard Test Method for Determining Filterability of 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 nm2/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.

General Information

• Status: Historical
• Publication Date: 09-Jun-2002
• ICS: 27.060.10 - Liquid and solid fuel burners
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.14 - Stability, Cleanliness and Compatibility of Liquid Fuels

Relations

• Replaces: ASTM D6426-01 - Standard Test Method for Determining Filterability of Distillate Fuel Oils
• Effective Date: 10-Jun-2002
• Replaced By: ASTM D6426-02a - Standard Test Method for Determining Filterability of Distillate Fuel Oils
• Effective Date: 10-Dec-2002
• Referred By: ASTM D7261-22 - Standard Test Method for Determining Water Separation Characteristics of Diesel Fuels by Portable Separometer
• Effective Date: 10-Jun-2002
• Referred By: ASTM D6974-20 - Standard Practice for Enumeration of Viable Bacteria and Fungi in Liquid Fuels—Filtration and Culture Procedures
• Effective Date: 10-Jun-2002
• Referred By: ASTM D6469-20 - Standard Guide for Microbial Contamination in Fuels and Fuel Systems
• Effective Date: 10-Jun-2002
• Referred By: ASTM D6824-23 - Standard Test Method for Determining Filterability of Aviation Turbine Fuel
• Effective Date: 10-Jun-2002
• Referred By: ASTM D2068-20 - Standard Test Method for Determining Filter Blocking Tendency
• Effective Date: 10-Jun-2002

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: D 6426 – 02
Standard Test Method for
1
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 3. Terminology
1.1 This test method covers a procedure for determining the 3.1 Definitions of Terms Specific to This Standard:
filterability of distillate fuel oils within the viscosity range from 3.1.1 For this test method, filterability is a measure of the
2
1.70 to 6.20 mm /s (cSt) at 40°C. rapidity with which a standard filter medium is plugged by
insoluble matter in fuel and can be described in either of the
NOTE 1—ASTM specification fuels falling within the scope of this test
following two ways:
method are Specification D 396 Grade Nos. 1 and 2, Specification D 975
3.1.1.1 filterability (by pressure)—the pressure drop across
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. a filter medium when 300 mL of fuel is passed at a rate of 20
mL/min.
1.2 This test method is not applicable to fuels that contain
3.1.1.2 filterability (by volume)—the volume of fuel passed
undissolved water.
when 104 kPa (15 psi) is reached. This method of report is used
1.3 The values stated in SI units shall be considered
when less than 300 mL passes at that pressure.
standard.
3.1.1.3 filterability quality factor (F-QF)—a value that de-
1.4 This standard does not purport to address all of the
fines the filter plugging tendency of a fuel caused by particu-
safety concerns, if any, associated with its use. It is the
late. The value is calculated using the volume and pressure
responsibility of the user of this standard to establish appro-
attained at the end of the test cycle. Depending on the outcome
priate safety and health practices and determine the applica-
of the test, two different equations are applied.
bility of regulatory limitations prior to use.
3.1.1.4 Discussion—Eq 1 is applied if the total sample was
discharged prior to reaching the maximum pressure or Eq 2 if
2. Referenced Documents
the maximum pressure was reached prior to discharging the
2.1 ASTM Standards:
2 entire sample. The equations proportion the results so that a
D 396 Specification for Fuel Oils
2
continuous range of 0 – 100 is attained. Eq 1 yields values
D 975 Specification for Diesel Fuel Oils
2 from 50 to 100, whereas Eq 2 yields values from 0 to 50.
D 2880 Specification for Gas Turbine Fuel Oils
Higher values signify less particulate that can plug a filter of a
D 4057 Practice for Manual Sampling of Petroleum and
3 given pore size and porosity.
Petroleum Products
D 4176 Test Method for Free Water and Particulate Con-
(1) If the total sample (300 mL) is discharged prior to reaching the
tamination in Distillate Fuels (Visual Inspection Proce- maximum pressure (104 kPa or 15 psi), the F-QF is calculated by the
3
following equation:
dures)
D 4177 Practice for Automatic Sampling of Petroleum and
F2QF 5 ~~15 psi 2 P !/15 psi!~50! 1 ~50! (1)
~300 mL at P ~F! ~F!
3
Petroleum Products
where:
D 4860 Test Method for Free Water and Particulate Con-
P = final pressure when the total sample (300 mL) was
tamination in Mid-Distillate Fuels (Clear and Bright Nu- (F)
3
discharged.
merical Rating)
4
E 1 Specification for ASTM Thermometers
(2) If the total sample is not discharged prior to reaching the
maximum pressure (104 kPa or 15 psi), the F-QF is calculated by the
following equation:
1
F2QF 5 V / 6 (2)
This test method is under the jurisdiction of ASTM Committee D02 on ~V ~F! at 15 psi! ~F!
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.14 on Stability and Cleanliness of Liquid Fuels. where:
Current edition approved June 10, 2002. Published August 2002. Originally
V = final volume when the maximum pressure was
(F)
published as D 6426–99. Last previous edition D 6426–01.
reached.
2
Annual Book of ASTM Standards, Vol 05.01.
3
3.1.1.5 Discussion—The final volume (V ) is divided by
Annual Book of ASTM Standards, Vol 05.02. (F)
4
Annual Book of ASTM Standards, Vol 14.03. six, since the maximum possible volume is 300 mL. By
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D6426–02
NOTE—Fuel flow from reservoir, through pump, to container.
FIG. 1
...