ASTM D2961/D2961M-17
(Test Method)Standard Test Method for Single-Stage Total Moisture Less than 15 % in Coal Reduced to 2.36-mm (No. 8 Sieve) Topsize
Standard Test Method 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 test method describes a procedure for determination of total moisture that requires less time than the procedures described in Test Method D3302.
SCOPE
1.1 This test method 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 test method 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 test method shall not be construed as the referee standard test method for total moisture. For referee purposes, users of this test method are referred to Test Method D3302 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 significant difference between the mean value of the results obtained by D2961 and D3302 (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 test methods were not compared in this study for some ranks of coal including lignite and anthracite. (See 11.2.)
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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D2961/D2961M − 17
Standard Test Method 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* 1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This test method covers a single-stage procedure for the
ization established in the Decision on Principles for the
determination of total moisture less than 15 % in coal reduced
Development of International Standards, Guides and Recom-
to 2.36-mm (No. 8 sieve) topsize. This test method is for
mendations issued by the World Trade Organization Technical
determinationoftotalmoistureonly.Materialssubjectedtothis
Barriers to Trade (TBT) Committee.
test shall not be used in the determination of other test
parameters. It is recognized that the conditions of the test can
2. Referenced Documents
increase the potential for significant oxidation effects on some
2
2.1 ASTM Standards:
coals. If the oxidation potential is of concern, the use of this
D121 Terminology of Coal and Coke
single-stage method shall involve prior agreement between the
D2013 Practice for Preparing Coal Samples for Analysis
parties involved. This test method shall not be construed as the
D3302 Test Method for Total Moisture in Coal
referee standard test method for total moisture. For referee
purposes, users of this test method are referred to Test Method
3. Terminology
D3302 for moisture determination methods which are not as
3.1 Definitions—For additional definitions of terms used in
susceptible to oxidation effects.
this test method, refer to Terminology D121.
1.2 Statistical analysis of data from several sources indi-
cates that at a 95% confidence level, there is statistically no 4. Summary of Test Method
significant difference between the mean value of the results
4.1 Moisture is determined by establishing the weight loss
obtained by D2961 and D3302 (that is, no bias is detected
of the coal sample by drying in an oven with forced-air
between the two methods at the 95% confidence level) for
circulation.
moisture levels between 1.4% and 15.8%. These two test
5. Significance and Use
methods were not compared in this study for some ranks of
coal including lignite and anthracite. (See 11.2.)
5.1 The measurement of total moisture is required to deter-
mine whether coal meets commercial or environmental
1.3 The values stated in either SI units or inch-pound units
specifications, or both. Within the limitations prescribed in the
are to be regarded separately as standard. The values stated in
scope, this test method describes a procedure for determination
each system may not be exact equivalents; therefore, each
of total moisture that requires less time than the procedures
system shall be used independently of the other. Combining
described in Test Method D3302.
values from the two systems may result in non-conformance
with the standard.
6. Apparatus
1.4 This standard does not purport to address all of the
6.1 Drying Pans, noncorrodible, stable at the temperature
safety concerns, if any, associated with its use. It is the
used, and of such size that the sample can be spread to a depth
responsibility of the user of this standard to establish appro-
of not more than 25 mm [1 in.].
priate safety, health, and environmental practices and deter-
6.1.1 The pan size may be varied to suit the size of the
mine the applicability of regulatory limitations prior to use.
sample and the oven. The height of the sides shall be no more
1
than 40 mm [1 ⁄2 in.] so that air is not restricted in passing over
the coal.
1
This test method is under the jurisdiction of ASTM Committee D05 on Coal
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of
2
Analysis. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 1, 2017. Published February 2017. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1971. Last previous edition approved in 2011 as D2961 – 11. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D2961_D2961M-17. 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
---------------------- Page: 1 ----------------------
D2961/D2961M − 17
TABLE 1 Concentrations Range and Li
...
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 − 11 D2961/D2961M − 17
Standard Test Method 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;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 Scope*
1.1 This test method covers a single-stage procedure for the determination of total moisture less than 15 % in coal reduced to
2.36- mm 2.36-mm (No. 8 sieve) topsize. This test method 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 test method shall not be construed as the referee standard test
method for total moisture. For referee purposes, users of this test method are referred to Test Method D3302 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 significant
difference between the mean value of the results obtained by D2961 and D3302 (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 test methods were not compared
in this study for some ranks of coal including lignite and anthracite. (See 10.211.2.)
1.3 The values stated in either SI units or inch-pound units are to be regarded as standard. No other units of measurement are
included in this standard. separately as standard. The values stated in each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the
standard.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D121 Terminology of Coal and Coke
D2013 Practice for Preparing Coal Samples for Analysis
D3302 Test Method for Total Moisture in Coal
3. Terminology
3.1 Definitions—For additional definitions of terms used in this test method, refer to Terminology D121.
4. Summary of Test Method
4.1 Moisture is determined by establishing the weight loss of the coal sample by drying in an oven with forced-air circulation.
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 prescribed in the scope, this test method describes a procedure for determination of total moisture
that requires less time than the procedures described in Test Method D3302.
1
This test method 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 Nov. 1, 2011Feb. 1, 2017. Published December 2011February 2017. Originally approved in 1971. Last previous edition approved in 20072011
as D2961 – 02D2961 – 11.(2007). DOI: 10.1520/D2961-11.10.1520/D2961_D2961M-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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.
*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
---------------------- Page: 1 ----------------------
D2961/D2961M − 17
TABLE 1 Concentrations Range and Limits for Repeatability and
Reproducibility for Single-Stage Total Moisture
Repeatability Limit Reproducibility Limit
r R
0.30% 0.50%
6. Apparatus
6.1 Drying Pans, noncorrodible, stable at the temperature used, and of such size that the sample can be spread to
...
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