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  • ASTM D 388 : 1999

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Standard Classification of Coals by Rank

    Available format(s):  Hardcopy, PDF

    Superseded date:  11-11-2014

    Language(s):  English

    Published date:  31-12-2010

    Publisher:  American Society for Testing and Materials

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    1.1 This standard covers the classification of coals by rank, that is, according to their degree of metamorphism, or progressive alteration, in the natural series from lignite to anthracite.

    1.2 This classification is applicable to coals that are composed mainly of vitrinite.

    Note 1—Coals rich in inertinite or liptinite (exinite), or both, cannot be properly classified because, in those macerals, the properties that determine rank (calorific value, volatile matter, and agglomerating character) differ greatly from those of vitrinite in the same coal. Often such coals can be recognized by megascopic examination. In North America, these coals are mostly nonbanded varieties that contain only a small proportion of vitrain and consist mainly of attrital materials. The degree of metamorphism of nonbanded and other vitrinite-poor coals can be estimated by determining the classification properties of isolated or concentrated vitrinite fractions, or by determining the reflectance of the vitrinite (see Test Method D 2798 and Appendix X1 of this classification). However, in the use of these vitrinite-poor coals, some properties normally associated with rank, such as rheology, combustibility, hardness, and grindability (as well as the rank determining properties) may differ substantially from those of vitrinite-rich coals of the same degree of metamorphism.

    The precision of the classification of impure coal may be impaired by the effect of large amounts of mineral matter on the determination of volatile matter and calorific value, and on their calculation to the mineral-matter-free basis.

    1.3 The values stated in British thermal units per pound are to be regarded as the standard. The SI equivalents of British thermal units per pound are approximate. All other values in SI units are to be regarded as standard.

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    Committee D 05
    Document Type Standard
    Publisher American Society for Testing and Materials
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    ASTM D 3172 : 2013 Standard Practice for Proximate Analysis of Coal and Coke
    ASTM D 121 : 2015 Standard Terminology of Coal and Coke
    ASTM D 3302/D3302M : 2019 Standard Test Method for Total Moisture in Coal
    ASTM D 3180 : 2015 Standard Practice for Calculating Coal and Coke Analyses from As-Determined to Different Bases
    ASTM D 2798 : 2020 Standard Test Method for Microscopical Determination of the Vitrinite Reflectance of Coal
    ASTM D 3175 : 2020 Standard Test Method for Volatile Matter in the Analysis Sample of Coal and Coke
    ASTM D 1412/D1412M : 2020 Standard Test Method for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30 °C
    ASTM D 5192 : 2009 : R2015 Standard Practice for Collection of Coal Samples from Core
    ASTM D 3174 : 2012 : R2018 : EDT 1 Standard Test Method for Ash in the Analysis Sample of Coal and Coke from Coal
    ASTM D 7708 : 2014 Standard Test Method for Microscopical Determination of the Reflectance of Vitrinite Dispersed in Sedimentary Rocks
    ASTM D 4596 : 2009 : R2015 Standard Practice for Collection of Channel Samples of Coal in a Mine
    ASTM D 4749/D4749M : 1987 : R2019 : EDT 1 Standard Test Method for Performing the Sieve Analysis of Coal and Designating Coal Size
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