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ASTM D720-91(2004)e1

Current Revision

Standard Test Method for Free-Swelling Index of Coal

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1.1 This test method is a small-scale 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 Breathing of asbestos dust is hazardous. Asbestos and asbestos products present demonstrated health risks for users and for those with whom they come into contact. In addition to other precautions, when working with asbestos-cement products, minimize the dust that results. For information on the safe use of chrysoltile asbestos, refer to, Safe Use of Chrysotile Asbestos: A Manual on Preventive and Control Measures.

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.


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 April 1, 2004
Language en - English
Page Count 5
Revision Level 91(2004)e1
Supercedes
Committee D05.15
Publish Date Document Id Type View
April 1, 2004 D0720-91R04E01 Revision
May 15, 2010 D0720-91R10 Reaffirmation
April 1, 2004 D0720-91R04 Reaffirmation
Sept. 10, 1999 D0720-91R99 Reaffirmation