ASTM D6426-07
(Test Method)Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils
Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils
SIGNIFICANCE AND USE
This test method is intended for use in the laboratory or field in evaluating distillate fuel cleanliness.
A change in filtration performance after storage, pretreatment, or commingling can be indicative of changes in fuel condition.
Relative filterability of fuels may vary depending on filter porosity and structure and may not always correlate with results from this test method.
Causes of poor filterability in industrial/refinery filters include fuel degradation products, contaminants picked up during storage or transfer, incompatibility of commingled fuels, or interaction of the fuel with the filter media. Any of these could correlate with orifice or filter system plugging, or both.
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 are to be regarded as the standard. The values given in parentheses are for information only.
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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Standards Content (Sample)
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Designation: D6426 − 07
StandardTest Method for
1
Determining Filterability of Middle Distillate Fuel Oils
This standard is issued under the fixed designation D6426; 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* E1 Specification for ASTM Liquid-in-Glass Thermometers
2.2 ASTM Adjuncts:
1.1 This test method covers a procedure for determining the
ADJ6300 D2PP, Version 4.43, Determination of Precision
filterabilityofdistillatefueloilswithintheviscosityrangefrom
2
and Bias Data for Use in Test Methods for Petroleum
1.70 to 6.20 mm /s (cSt) at 40°C.
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Products
NOTE 1—ASTM specification fuels falling within the scope of this test
method are Specification D396 Grade Nos. 1 and 2, Specification D975
3. Terminology
Grades 1-D, low sulfur 1-D, 2-D, and low sulfur 2-D, and Specification
D2880 Grade Nos. 1-GT and 2-GT. 3.1 Definitions of Terms Specific to This Standard:
3.1.1 For this test method, filterability is a measure of the
1.2 This test method is not applicable to fuels that contain
rapidity with which a standard filter medium is plugged by
undissolved water.
insoluble matter in fuel and can be described in either of the
1.3 The values stated in SI units are to be regarded as
following two ways:
standard. The values given in parentheses are for information
3.1.2 filterability (by pressure)—the pressure drop across a
only.
filter medium when 300 mL of fuel is passed at a rate of 20
1.4 This standard does not purport to address all of the
mL/min.
safety concerns, if any, associated with its use. It is the
3.1.3 filterability (by volume)—the volume of fuel passed
responsibility of the user of this standard to establish appro-
when104kPa(15psi)isreached.Thismethodofreportisused
priate safety and health practices and determine the applica-
when less than 300 mL passes at that pressure.
bility of regulatory limitations prior to use.
3.1.4 filterability quality factor (F-QF)—avaluethatdefines
thefilterpluggingtendencyofafuelcausedbyparticulate.The
2. Referenced Documents
value is calculated using the volume and pressure attained at
2
2.1 ASTM Standards:
the end of the test cycle. Depending on the outcome of the test,
D396 Specification for Fuel Oils
two different equations are applied.
D975 Specification for Diesel Fuel Oils
3.1.4.1 Discussion—Eq 1 is applied if the total sample was
D2880 Specification for Gas Turbine Fuel Oils
discharged prior to reaching the maximum pressure or Eq 2 if
D4057 Practice for Manual Sampling of Petroleum and
the maximum pressure was reached prior to discharging the
Petroleum Products
entire sample. The equations proportion the results so that a
D4176 Test Method for FreeWater and Particulate Contami-
continuous range of 0 – 100 is attained. Eq 1 yields values
nation in Distillate Fuels (Visual Inspection Procedures)
from 50 to 100, whereas Eq 2 yields values from 0 to 50.
D4177 Practice for Automatic Sampling of Petroleum and
Higher values signify less particulate that can plug a filter of a
Petroleum Products
given pore size and porosity.
D4860 Test Method for FreeWater and Particulate Contami-
(1) If the total sample (300 mL) is discharged prior to
nation in Middle Distillate Fuels (Clear and Bright Nu-
reaching the maximum pressure (104 kPa or 15 psi), the
merical Rating)
F-QF is calculated by the following equation:
F 2 QF 5 15 psi 2 P /15 psi ~50!1~50! (1)
~~ ! !
~300 mL at P ~F! ~F!
1
This test method is under the jurisdiction of ASTM Committee D02 on
where:
Petroleum Products and Lubricantsand is the direct responsibility of Subcommittee
D02.14 on Stability and Cleanliness of Liquid Fuels. P = final pressure when the total sample (300 mL) was
(F)
Current edition approved July 1, 2007. Published August 2007. Originally
discharged.
approved in 1999. Last previous edition approved in 2004 as D6426–04. DOI:
10.1520/D6426-07.
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
3
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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D6426 − 07
NOTE 1—Fuel flow from reservoir, through pump, to container.
FIG. 1 Schematic Diagram of Filterability Apparatus
(2) If the total sample is not discharged prior to reaching 5.4 Causes of poor filterab
...
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