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ASTM D2961-02e1

(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

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 D 3302 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 D 2961 and D 3302 (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. Supporting data has been filed at ASTM Headquarters and may be obtained by requesting Research Report D05-1024.
1.3 The values stated in SI units are to be regarded as 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.

General Information

Status
Historical
Publication Date
09-Oct-2002
ICS
75.160.10 - Solid fuels
Technical Committee
D05 - Coal and Coke
Drafting Committee
D05.21 - Methods of Analysis
Current Stage
Ref Project

Relations

Replaces
ASTM D2961-02 - Standard Test Method for Single-Stage Total Moisture Less than 15% in Coal Reduced to 2.36-mm (No. 8 Sieve)Topsize
Effective Date
10-Oct-2002
Replaced By
ASTM D2961-02(2007) - Standard Test Method for Single-Stage Total Moisture Less than 15% in Coal Reduced to 2.36-mm (No. 8 Sieve) Topsize
Effective Date
01-May-2007
Referred By
ASTM D6796-21e1 - Standard Practice for Production of Coal, Coke and Coal Combustion Samples for Interlaboratory Studies
Effective Date
10-Oct-2002

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ASTM D2961-02e1 - Standard Test Method for Single-Stage Total Moisture Less than 15% in Coal Reduced to 2.36-mm (No. 8 Sieve) TopsizeASTM D2961-02e1 - Standard Test Method for Single-Stage Total Moisture Less than 15% in Coal Reduced to 2.36-mm (No. 8 Sieve) Topsize
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ASTM D2961-02e1 - Standard Test Method for Single-Stage Total Moisture Less than 15% in Coal Reduced to 2.36-mm (No. 8 Sieve) Topsize
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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
e1
Designation:D2961–02
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 D 2961; 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 9.1.1 and 9.1.2 were editorially corrected in June 2004.
1. Scope 2. Referenced Documents
2
1.1 This test method covers a single-stage procedure for the 2.1 ASTM Standards:
determination of total moisture less than 15 % in coal reduced D 2013 Test Method of Preparing Coal Samples for Analy-
to 2.36- mm (No. 8 sieve) topsize. This test method is for sis
determinationoftotalmoistureonly.Materialssubjectedtothis D 3302 Test Method for Total Moisture in Coal
test shall not be used in the determination of other test
3. Summary of Test Method
parameters. It is recognized that the conditions of the test can
increase the potential for significant oxidation effects on some 3.1 Moisture is determined by establishing the weight loss
of the coal sample by drying in an oven with forced-air
coals. If the oxidation potential is of concern, the use of this
single-stage method shall involve prior agreement between the circulation.
parties involved. This test method shall not be construed as the
4. Significance and Use
referee standard test method for total moisture. For referee
4.1 The measurement of total moisture is required to deter-
purposes, users of this test method are referred to Test Method
mine whether coal meets commercial or environmental speci-
D 3302 for moisture determination methods which are not as
fications, or both. Within the limitations prescribed in the
susceptible to oxidation effects.
scope, this test method describes a procedure for determination
1.2 Statistical analysis of data from several sources indi-
of total moisture that requires less time than the procedures
cates that at a 95% confidence level, there is statistically no
described in Test Method D 3302.
significant difference between the mean value of the results
obtained by D 2961 and D 3302 (that is, no bias is detected
5. Apparatus
between the two methods at the 95% confidence level) for
5.1 Drying Pans, noncorrodible, stable at the temperature
moisture levels between 1.4% and 15.8%. These two test
used, and of such size that the sample can be spread to a depth
methods were not compared in this study for some ranks of
of not more than 25 mm (1 in.).
coal including lignite and anthracite. Supporting data has been
5.1.1 The pan size may be varied to suit the size of the
filed at ASTM Headquarters and may be obtained by request-
sample and the oven. The height of the sides shall be no more
ing Research Report D05-1024.
1
than 40 mm (1 ⁄2 in.) so that air is not restricted in passing over
1.3 The values stated in SI units are to be regarded as the
the coal.
standard.
5.2 Drying Oven, forced air-type capable of maintaining a
1.4 This standard does not purport to address all of the
temperature of 107 6 3°C and constructed to provide for a
safety concerns, if any, associated with its use. It is the
continuous air flow to all parts of the oven.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
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. 10, 2002. Published January 2003. Originally Standards volume information, refer to the standard’s Document Summary page on
published as D 2961 – 71 T. Last previous edition D 2961 – 01. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
e1
D2961–02
6. Sampling
where:
M = total moisture in the coal as analyzed, %,
6.1 The sample shall be prepared according to Test Method
W = weight of empty pan,
D 2013 except that the 500 g portion can be further subdivided 1
W = weight of empty sample container,
2
to 125 g.
W = weight of coal plus pan plus sample container wet,
3
6.2 That portion of the sample used for the moisture
and
determination shall have a minimum weight of 125 g.
W = weight of coal plus pan plus sample container after
4
7. Procedure
drying.
7.1 Weigh the empty drying pan. Record the mas
...

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