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ASTM D720/D720M-24

Current Revision

Standard Test Method for Free-Swelling Index of Coal

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1.1 This test method2 is a small-scale, empirical test for obtaining information regarding the free-swelling properties of a coal. The results may be used as an indication of the caking characteristic of the coal when burned as a fuel. This test is not recommended as a method for the determination of expansion of coals in coke ovens.

1.2 Units—The values stated in either SI units or non-SI units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

1.3 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.

1.4 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.


3.1 This test method, in addition to indicating the caking properties of a coal when burned as a fuel, can be used to give a broad indication of the degree of oxidation of a coal.

SDO ASTM: ASTM International
Document Number D720
Publication Date July 1, 2024
Language en - English
Page Count 6
Revision Level 24
Supercedes
Committee D05.15
Publish Date Document Id Type View
July 1, 2024 D0720_D0720M-24 Revision
Nov. 1, 2023 D0720_D0720M-23 Revision
Sept. 1, 2022 D0720_D0720M-22 Revision
Jan. 1, 2015 D0720_D0720M-15E01 Revision
Jan. 1, 2015 D0720_D0720M-15 Revision