ASTM D2068-97

    Standard Test Method for Filter Blocking Tendency of Distillate Fuel Oils


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    1. Scope

    1.1 This test method describes a procedure for determining the filter blocking tendency (FBT) of distillate fuel oils where the end use demands an exceptional degree of cleanliness. This test method is applicable to fuels within the viscosity range of 1.50 to 6.00 mm2/s (cSt) at 40°C.

    Note 1-ASTM specification fuels falling within the scope of this test method are Specification D396 Grade Numbers 1 and 2, Specification D975 Grades 1-D and 2-D, and Specification D2880 Grades 1-GT and 2-GT.

    1.2 This test method is thus not applicable to fuels that are found to contain undissolved water, because such water interferes with the measurement of filter blockage (see 9.3).

    1.3 Annex A1 describes a standard procedure for preparing a test fluid for use in calibrating the apparatus used in this test method.

    1.4 The values stated in acceptable SI units shall be considered standard.

    1.5 This standard does not purport to address all of the safety problems 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.> Specific precautionary statements are given in Notes 2 and 3.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    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)

    D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants

    D6426 Test Method for Determining Filterability of Middle Distillate Fuel Oils

    D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material

    D6751 Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels

    ISO Standard

    ISO 5636-5 Paper and BoardDetermination of Air Permeance and Air Resistance (Medium Range) Part 5 Gurley Method


    ICS Code

    ICS Number Code 75.160.20 (Liquid fuels)

    Referencing This Standard
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    DOI: 10.1520/D2068-97

    Citation Format

    ASTM D2068-97, Standard Test Method for Filter Blocking Tendency of Distillate Fuel Oils, ASTM International, West Conshohocken, PA, 1991, www.astm.org

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