ASTM D2961/D2961M-19

Standard Practice for Single-Stage Total Moisture Less than 15 % in Coal Reduced to 2.36 mm [No. 8 Sieve] Topsize

SIGNIFICANCE AND USE
5.1 The measurement of total moisture is required to determine whether coal meets commercial or environmental specifications, or both. Within the limitations prescribed in the scope, this practice describes a procedure for determination of total moisture that requires less time than the procedures described in Test Method D3302/D3302M.
SCOPE
1.1 This practice covers a single-stage procedure for the determination of total moisture less than 15 % in coal reduced to 2.36 mm [No. 8 sieve] topsize. This practice is for determination of total moisture only. Materials subjected to this test shall not be used in the determination of other test parameters. It is recognized that the conditions of the test can increase the potential for significant oxidation effects on some coals. If the oxidation potential is of concern, the use of this single-stage method shall involve prior agreement between the parties involved. This practice shall not be construed as the referee standard practice for total moisture. For referee purposes, users of this practice are referred to Test Method D3302/D3302M for moisture determination methods which are not as susceptible to oxidation effects.  
1.2 Statistical analysis of data from several sources indicates that at a 95 % confidence level, there is statistically no difference between the mean value of the results obtained by Practice D2961/D2961M and Test Method D3302/D3302M (that is, no bias is detected between the two methods at the 95 % confidence level) for moisture levels between 1.4 % and 15.8 %. These two standards were not compared in this study for some ranks of coal including lignite and anthracite.2  
1.3 The values stated in either SI units or inch-pound 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.  
1.4 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.  
1.5 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.

General Information

• Status: Published
• Publication Date: 28-Feb-2019
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.21 - Methods of Analysis

Relations

• Refers: ASTM D121-15 - Standard Terminology of Coal and Coke
• Effective Date: 01-Sep-2015

Standards Content (Sample)

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.
Designation: D2961/D2961M − 19
Standard Practice for
Single-Stage Total Moisture Less than 15 % in Coal
1
Reduced to 2.36 mm [No. 8 Sieve] Topsize
This standard is issued under the fixed designation D2961/D2961M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 This practice covers a single-stage procedure for the
1.5 This international standard was developed in accor-
determination of total moisture less than 15 % in coal reduced
dance with internationally recognized principles on standard-
to 2.36 mm [No. 8 sieve] topsize. This practice is for determi-
ization established in the Decision on Principles for the
nation of total moisture only. Materials subjected to this test
Development of International Standards, Guides and Recom-
shall not be used in the determination of other test parameters.
mendations issued by the World Trade Organization Technical
It is recognized that the conditions of the test can increase the
Barriers to Trade (TBT) Committee.
potential for significant oxidation effects on some coals. If the
oxidation potential is of concern, the use of this single-stage
2. Referenced Documents
method shall involve prior agreement between the parties
3
2.1 ASTM Standards:
involved. This practice shall not be construed as the referee
D121 Terminology of Coal and Coke
standard practice for total moisture. For referee purposes, users
D2013/D2013M Practice for Preparing Coal Samples for
ofthispracticearereferredtoTestMethodD3302/D3302Mfor
Analysis
moisturedeterminationmethodswhicharenotassusceptibleto
D3302/D3302M Test Method for Total Moisture in Coal
oxidation effects.
1.2 Statistical analysis of data from several sources indi-
3. Terminology
cates that at a 95 % confidence level, there is statistically no
3.1 Definitions—For additional definitions of terms used in
difference between the mean value of the results obtained by
this practice, refer to Terminology D121.
Practice D2961/D2961M and Test Method D3302/D3302M
(that is, no bias is detected between the two methods at the
4. Summary of Practice
95 % confidence level) for moisture levels between 1.4 % and
4.1 Moisture is determined by establishing the mass loss of
15.8 %. These two standards were not compared in this study
2
the coal sample by drying in an oven with forced-air circula-
for some ranks of coal including lignite and anthracite.
tion.
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
5. Significance and Use
each system are not necessarily exact equivalents; therefore, to
5.1 The measurement of total moisture is required to deter-
ensure conformance with the standard, each system shall be
mine whether coal meets commercial or environmental
used independently of the other, and values from the two
specifications, or both. Within the limitations prescribed in the
systems shall not be combined.
scope, this practice describes a procedure for determination of
1.4 This standard does not purport to address all of the
total moisture that requires less time than the procedures
safety concerns, if any, associated with its use. It is the
described in Test Method D3302/D3302M.
responsibility of the user of this standard to establish appro-
6. Apparatus
6.1 Drying Pans, noncorrodible, stable at the temperature
1
This practice is under the jurisdiction of ASTM Committee D05 on Coal and
used, and of such size that the sample can be spread to a depth
Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
of not more than 25 mm [1 in.].
Analysis.
Current edition approved March 1, 2019. Published March 2019. Originally
approvedin1971.Lastpreviouseditionapprovedin2018asD2961/D2961M – 18a.
3
DOI: 10.1520/D2961_D2961M-19. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
2
Supporting data have been filed at ASTM International Headquarters and may contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
beobtainedbyrequestingResearchReportRR:D05-1024.ContactASTMCustomer Standards volume information, refer to the standard’s Document Summary page on
Service at [e-mail]. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
Designation: D2961/D2961M − 18a D2961/D2961M − 19
Standard Practice for
Single-Stage Total Moisture Less than 15 % in Coal
1
Reduced to 2.36 mm [No. 8 Sieve] Topsize
This standard is issued under the fixed designation D2961/D2961M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice covers a single-stage procedure for the determination of total moisture less than 15 % in coal reduced to
2.36 mm [No. 8 sieve] topsize. This practice is for determination of total moisture only. Materials subjected to this test shall not
be used in the determination of other test parameters. It is recognized that the conditions of the test can increase the potential for
significant oxidation effects on some coals. If the oxidation potential is of concern, the use of this single-stage method shall involve
prior agreement between the parties involved. This practice shall not be construed as the referee standard practice for total
moisture. For referee purposes, users of this practice are referred to Test Method D3302/D3302M for moisture determination
methods which are not as susceptible to oxidation effects.
1.2 Statistical analysis of data from several sources indicates that at a 95 % confidence level, there is statistically no difference
between the mean value of the results obtained by Practice D2961/D2961M and Test Method D3302/D3302M (that is, no bias is
detected between the two methods at the 95 % confidence level) for moisture levels between 1.4 % and 15.8 %. These two
2
standards were not compared in this study for some ranks of coal including lignite and anthracite.
1.3 The values stated in either SI units or inch-pound 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.
1.4 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.
1.5 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.
2. Referenced Documents
3
2.1 ASTM Standards:
D121 Terminology of Coal and Coke
D2013/D2013M Practice for Preparing Coal Samples for Analysis
D3302/D3302M Test Method for Total Moisture in Coal
3. Terminology
3.1 Definitions—For additional definitions of terms used in this practice, refer to Terminology D121.
4. Summary of Practice
4.1 Moisture is determined by establishing the mass loss of the coal sample by drying in an oven with forced-air circulation.
1
This practice is under the jurisdiction of ASTM Committee D05 on Coal and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of Analysis.
Current edition approved Dec. 1, 2018March 1, 2019. Published January 2019March 2019. Originally approved in 1971. Last previous edition approved in 2018 as
D2961/D2961M – 18.D2961/D2961M – 18a. DOI: 10.1520/D2961_D2961M-18A.10.1520/D2961_D2961M-19.
2
Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:D05-1024. Contact ASTM Customer
Service at [e-mail].
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D2961/D2961M − 19
5. Significance and Use
5.1 The measurement of total moisture is required to determine whether coal meets commercial or environmental specifications,
or both. Within the limitations presc
...