Standard test method for total moisture in coal
This method covers the measurement of the total moisture in coal as it exists at the site, at the time, and under the conditions it is sampled. It is applicable to coals as mined, processed, shipped, or utilized in normal commercial pursuits. Exceptions are coal-water slurries, sludges, or pulverized products, or both, under 0.5-mm diameter sieve size. It is applicable to coals of all ranks within the recognized limitations imposed by oxidation and decomposition variations of lower rank coals. Because of its empirical nature, strict adherence to basic principles and permissive procedures are required for valid results. The standard is available to producers, vendors, and consumers as a total moisture method when other procedures or modifications are not mutually agreed on. Since coal can vary from extremely wet (water-saturated) to completely dry, special emphasis must be placed on the sampling, sample preparation, and the moisture determination itself to ensure total reliability of measurement. Therefore, this standard is recommended entailing collection of the gross sample, sample preparation, and the method of determination. While it is recognized that such a standard may be unwieldly for routine usage commercial operations, it can provide a common base for agreement in cases of dispute or arbitration. Also, embodied in the standard are segments that can be extracted and used as is or, with the agreement of the parties involved, as the basis for contract specifications.
- OSTI ID:
- 7213592
- Journal Information:
- Annu. Book ASTM Stand.; (United States), Journal Name: Annu. Book ASTM Stand.; (United States) Vol. 26; ISSN ASTSA
- Country of Publication:
- United States
- Language:
- English
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