ASTM D3302-07ae1
(Test Method)Standard Test Method for Total Moisture in Coal
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.
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.
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e1
Designation:D3302–07a
Standard Test Method for
1
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
e NOTE—9.2.4.4 was editorially corrected in November 2007.
1. Scope priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
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
2. Referenced Documents
the conditions it is sampled. It is applicable to coals as mined,
2
2.1 ASTM Standards:
processed, shipped, or used in normal commercial pursuits. It
D 121 Terminology of Coal and Coke
is not applicable to coal-water slurries, sludges, or pulverized
D 388 Classification of Coals by Rank
products under 0.5-mm-diameter sieve size. It is applicable to
D 2013 Practice for Preparing Coal Samples for Analysis
coals of all ranks within the recognized limitations imposed by
D 2234/D 2234M PracticeforCollectionofaGrossSample
oxidation and decomposition characteristics of lower rank
of Coal
coals. Because of its empirical nature, strict adherence to basic
D 2961 Test Method for Single-Stage Total Moisture Less
principles and permissive procedures are required for valid
than 15 % in Coal Reduced to 2.36-mm (No. 8 Sieve)
results (seeAppendix X1). This complete standard is available
Topsize
to producers, sellers, and consumers as a total moisture method
D 3173 Test Method for Moisture in theAnalysis Sample of
when other procedures or modifications are not mutually
Coal and Coke
agreed on.
D 5865 Test Method for Gross Calorific Value of Coal and
1.2 Since coal can vary from extremely wet (water-
Coke
saturated) to completely dry, special emphasis must be placed
on the sampling, sample preparation, and the moisture deter-
3. Terminology
mination itself to ensure total reliability of measurement.
3.1 Definitions—For additional definitions of terms used in
Therefore, this standard entails collection of the gross sample,
this test method, refer to Terminology D 121.
sample preparation, and the method of determination.
3.2 Definitions of Terms Specific to This Standard:
1.3 While it is recognized that such a standard may be
3.2.1 air drying—a process of partial drying of a coal
unwieldy for routine usage in commercial operations, it can
sample to bring it to near equilibrium with the atmosphere in
provide a common base for agreement in cases of dispute or
theroominwhichfurtherreduction/divisionofthesampleisto
arbitration. The complete standard is referred to as the referee
take place.
method. Embodied in the standard is the commercial method
3.2.2 air-dry loss—the loss in weight, expressed as a
starting with the crushed and divided sample when the gross
percent, resulting from each air-drying operation.
sample is not too wet to crush and divide. See Test Methods
3.2.3 easily oxidized coals—low-rank coals such as subbi-
D 2961 and D 3173 for other moisture methods.
tuminous or lignitic coals.
1.4 The values stated in SI units are to be regarded as the
3.2.4 equilibrium—conditionreachedinairdryingwhenthe
standard. The values given in parentheses are for information
change in weight of the sample, under conditions of ambient
only.
temperature and humidity, is no more than 0.1 %/h or 0.05 %/
1.5 This standard does not purport to address all of the
1
⁄2 h.
safety concerns, if any, associated with its use. It is the
3.2.5 residual moisture—that moisture remaining in the
responsibility of the user of this standard to establish appro-
sample after air drying.
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal
2
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Analysis. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Oct. 1, 2007. Published October 2007. Originally Standards volume information, refer to the standard’s Document Summary page on
e1
approved in 1974. Last previous edition approved in 2007 as D 3302–07 . the ASTM website.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
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D3302–07a
FIG. 1 Total Moisture Determination on Gross Sample, Special Moisture Subsample, or on Crushed and Divided Sample
3.2.6 total moisture—see Terminology D 121. 4.2 Alternative Methods:
4.2.1 Referee Method, which may be used in cases of
4. Summary
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
e1
Designation:D3302–07a
Designation:D3302–07
Standard Test Method for
1
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
e NOTE—Sections 9.3.2, 9.3.3 and Figure 1 were editorially corrected in September 2007.
—9.2.4.4 was editorially corrected in November 2007.
1. 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
itsempiricalnature,strictadherencetobasicprinciplesandpermissiveproceduresarerequiredforvalidresults(seeAppendixX1).
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 121 Terminology of Coal and Coke
D 388 Classification of Coals by Rank
D 2013 Practice for Preparing Coal Samples for Analysis
D 2234/D 2234M Practice for Collection of a Gross Sample of Coal
D 2961 Test Method for Single-Stage Total Moisture Less than 15 % in Coal Reduced to 2.36-mm (No. 8 Sieve) Topsize
D 3173 Test Method for Moisture in the Analysis Sample of Coal and Coke
D 5865 Test Method for Gross Calorific Value of Coal and Coke
3. Terminology
3.1 Definitions—For additional definitions of terms used in this test method, refer to Terminology D 121.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 air drying—a process of partial drying of a coal sample to bring it to near equilibrium with the atmosphere in the room
in which further reduction/division of the sample is to take place.
3.2.2 air-dry loss—the loss in weight, expressed as a percent, resulting from each air-drying operation.
3.2.3 easily oxidized coals—low-rank coals such as subbituminous or lignitic coals.
3.2.4 equilibrium—condition reached in air drying when the change in weight of the sample, under conditions of ambient
1
This test method is under the jurisdiction ofASTM Committee D05 on Coal and Coke and is the direct responsibility of Subcommittee D05.21 on Methods ofAnalysis.
Current edition approved JuneOct. 1, 2007. Published JuneOctober 2007. Originally approved in 1974. Last previous edition approved in 20052007 as
e1
D3302–05D 3302–07 .
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
1
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D3302–07a
D3
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