ASTM D3302-02

Standard Test Method for Total Moisture in Coal

SCOPE
1.1 This test 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 used in normal commercial pursuits. It is not applicable to coal-water slurries, sludges, or pulverized products under 0.5-mm-diameter sieve size. It is applicable to coals of all ranks within the recognized limitations imposed by oxidation and decomposition characteristics of lower rank coals. Because of its empirical nature, strict adherence to basic principles and permissive procedures are required for valid results (see Appendix X1). This complete standard is available to producers, sellers, and consumers as a total moisture method when other procedures or modifications are not mutually agreed on.
1.2 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 entails collection of the gross sample, sample preparation, and the method of determination.
1.3 While it is recognized that such a standard may be unwieldy for routine usage in commercial operations, it can provide a common base for agreement in cases of dispute or arbitration. The complete standard is referred to as the referee method. Embodied in the standard is the commercial method starting with the crushed and divided sample when the gross sample is not too wet to crush and divide. See Test Methods D 2961 and D 3173 for other moisture methods.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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.

General Information

• Status: Historical
• Publication Date: 09-Apr-2002
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.21 - Methods of Analysis

Relations

• Replaced By: ASTM D3302-02a - Standard Test Method for Total Moisture in Coal
• Effective Date: 10-Oct-2002
• Referred By: ASTM D6542-05(2018)e1 - Standard Practice for Tonnage Calculation of Coal in a Stockpile
• Effective Date: 10-Apr-2002
• Referred By: ASTM D7569/D7569M-10(2015)e1 - Standard Practice for Determination of Gas Content of Coal—Direct Desorption Method
• Effective Date: 10-Apr-2002
• Referred By: ASTM D3176-15 - Standard Practice for Ultimate Analysis of Coal and Coke
• Effective Date: 10-Apr-2002
• Referred By: ASTM D8010-18 - Standard Test Method for Determination of Water Soluble Alkali Content in Coal
• Effective Date: 10-Apr-2002
• Referred By: ASTM D7582-15 - Standard Test Methods for Proximate Analysis of Coal and Coke by Macro Thermogravimetric Analysis
• Effective Date: 10-Apr-2002
• Referred By: ASTM D1412/D1412M-20 - Standard Test Method for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30 °C
• Effective Date: 10-Apr-2002
• Referred By: ASTM D3180-15 - Standard Practice for Calculating Coal and Coke Analyses from As-Determined to Different Bases
• Effective Date: 10-Apr-2002
• Referred By: ASTM D121-15 - Standard Terminology of Coal and Coke
• Effective Date: 10-Apr-2002
• Referred By: ASTM D4931-06(2017) - Standard Test Method for Gross Moisture in Green Petroleum Coke
• Effective Date: 10-Apr-2002
• Referred By: ASTM D409/D409M-16 - Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method
• Effective Date: 10-Apr-2002
• Referred By: ASTM D4749/D4749M-87(2019)e1 - Standard Test Method for Performing the Sieve Analysis of Coal and Designating Coal Size
• Effective Date: 10-Apr-2002
• Referred By: ASTM D7430/D7430M-22 - Standard Practice for Mechanical Sampling of Coal
• Effective Date: 10-Apr-2002
• Referred By: ASTM D2014/D2014M-20 - Standard Test Method for Expansion or Contraction of Coal by the Sole-Heated Oven
• Effective Date: 10-Apr-2002
• Referred By: ASTM D3173/D3173M-17a - Standard Test Method for Moisture in the Analysis Sample of Coal and Coke
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation:D3302–02
Standard Test Method for
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Total Moisture in Coal
This standard is issued under the fixed designation D 3302; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
1.1 This test method covers the measurement of the total 2.1 ASTM Standards:
2
moisture in coal as it exists at the site, at the time, and under D 121 Terminology of Coal and Coke
2
the conditions it is sampled. It is applicable to coals as mined, D 2013 Practice for Preparing Coal Samples for Analysis
2
processed, shipped, or used in normal commercial pursuits. It D 2234 Practice for Collection of a Gross Sample of Coal
is not applicable to coal-water slurries, sludges, or pulverized D 2961 Test Method for Single-Stage Total Moisture Less
products under 0.5-mm-diameter sieve size. It is applicable to than 15% in Coal Reduced to 2.36-mm (No. 8 Sieve)
2
coals of all ranks within the recognized limitations imposed by Topsize
oxidation and decomposition characteristics of lower rank D 3173 Test Method for Moisture in theAnalysis Sample of
2
coals. Because of its empirical nature, strict adherence to basic Coal and Coke
principles and permissive procedures are required for valid D 3180 Practice for Calculating Coal and Coke Analyses
2
results (seeAppendix X1). This complete standard is available from As-Determined to Different Bases
to producers, sellers, and consumers as a total moisture method D 5865 Test Method for Gross Calorific Value of Coal and
2
when other procedures or modifications are not mutually Coke
agreed on.
3. Terminology
1.2 Since coal can vary from extremely wet (water-
3.1 Definitions—For additional definitions of terms used in
saturated) to completely dry, special emphasis must be placed
on the sampling, sample preparation, and the moisture deter- this test method, refer to Terminology D 121.
3.2 Definitions of Terms Specific to This Standard:
mination itself to ensure total reliability of measurement.
Therefore, this standard entails collection of the gross sample, 3.2.1 air drying—a process of partial drying of a coal
sample to bring it to near equilibrium with the atmosphere in
sample preparation, and the method of determination.
theroominwhichfurtherreduction/divisionofthesampleisto
1.3 While it is recognized that such a standard may be
unwieldy for routine usage in commercial operations, it can take place.
3.2.2 air-dry loss—the loss in weight, expressed as a
provide a common base for agreement in cases of dispute or
arbitration. The complete standard is referred to as the referee percent, resulting from each air-drying operation.
3.2.3 easily oxidized coals—low-rank coals such as subbi-
method. Embodied in the standard is the commercial method
starting with the crushed and divided sample when the gross tuminous or lignitic coals.
3.2.4 equilibrium—conditionreachedinairdryingwhenthe
sample is not too wet to crush and divide. See Test Methods
D 2961 and D 3173 for other moisture methods. change in weight of the sample, under conditions of ambient
temperature and humidity, is no more than 0.1 %/h or 0.05 %/
1.4 The values stated in SI units are to be regarded as the
1
standard. The values given in parentheses are for information ⁄2 h.
3.2.5 residual moisture—that moisture remaining in the
only.
1.5 This standard does not purport to address all of the sample after air drying.
3.2.6 total moisture—see Terminology D 121.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method (See Fig. 1)
priate safety and health practices and determine the applica-
4.1 This test method is based on the loss in weight of a coal
bility of regulatory limitations prior to use.
sampleinanairatmosphereunderrigidlycontrolledconditions
of temperature, time, and airflow.
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal
4.2 Alternative Methods:
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
Analysis.
Current edition approved Oct. 10, 2002. Published January 2003. Originally
2
approved in 1974. Last previous approved in 2002 as D3302–02. Annual Book of ASTM Standards, Vol 05.06.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D3302–02
FIG. 1 Total Moisture Determination
...