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Significance and Use
5.1 This test method is intended for use in the laboratory or field in evaluating distillate fuel cleanliness.
5.2 A change in filtration performance after storage, pretreatment, or commingling can be indicative of changes in fuel condition.
5.3 Relative filterability of fuels may vary depending on filter porosity and structure and may not always correlate with results from this test method.
5.4 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.
1.1 This test method covers a procedure for determining the filterability of distillate fuel oils within the viscosity range from 1.70 mm2/s to 6.20 mm2/s (cSt) at 40 °C.
Note 1: ASTM specification fuels falling within the scope of this test method are Specification Grade No. 2, Specification Grade No. 2-D, and Specification Grade No. 2-GT.
Note 2: The test method has been used with lower viscosity middle distillate fuels such as Specification Grade No. 1, Specification Grade No. 1-D, and Specification Grade No. 1-GT, but the precision has not been studied and therefore the stated precision has not been validated for these grades.
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 standard.
1.3.1 Non-SI units, specifically U.S. customary units such as temperature in degrees Fahrenheit and pressure in pounds per square inch gauge (psig), are included for information.
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.
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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D396 Specification for Fuel Oils
D975 Specification for Diesel Fuel Oils
D2880 Specification for Gas Turbine Fuel Oils
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4176 Test Method for Free Water and Particulate Contamination in Distillate Fuels (Visual Inspection Procedures)
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D4860 Test Method for Free Water and Particulate Contamination in Middle Distillate Fuels (Clear and Bright Numerical Rating)
ICS Number Code 27.060.10 (Liquid and solid fuel burners)
UNSPSC Code 15101500(Petroleum and distillates)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D6426-18, Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils, ASTM International, West Conshohocken, PA, 2018, www.astm.orgBack to Top