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ASTM D2961-02

(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 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. 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

Replaced By
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
Effective Date
10-Oct-2002
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 D2961-02 - Standard Test Method for Single-Stage Total Moisture Less than 15% in Coal Reduced to 2.36-mm (No. 8 Sieve)TopsizeASTM D2961-02 - 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 D2961-02 - 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.
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. Scope D 2013 Test Method of Preparing Coal Samples for Analy-
2
sis
1.1 This test method covers a single-stage procedure for the
2
D 3302 Test Method for Total Moisture in Coal
determination of total moisture less than 15 % in coal reduced
to 2.36- mm (No. 8 sieve) topsize. This test method is for
3. Summary of Test Method
determinationoftotalmoistureonly.Materialssubjectedtothis
3.1 Moisture is determined by establishing the weight loss
test shall not be used in the determination of other test
of the coal sample by drying in an oven with forced-air
parameters. It is recognized that the conditions of the test can
circulation.
increase the potential for significant oxidation effects on some
coals. If the oxidation potential is of concern, the use of this
4. Significance and Use
single-stage method shall involve prior agreement between the
4.1 The measurement of total moisture is required to deter-
parties involved. This test method shall not be construed as the
mine whether coal meets commercial or environmental speci-
referee standard test method for total moisture. For referee
fications, or both. Within the limitations prescribed in the
purposes, users of this test method are referred to Test Method
scope, this test method describes a procedure for determination
D 3302 for moisture determination methods which are not as
of total moisture that requires less time than the procedures
susceptible to oxidation effects.
described in Test Method D 3302.
1.2 Statistical analysis of data from several sources indi-
cates that at a 95% confidence level, there is statistically no
5. Apparatus
significant difference between the mean value of the results
5.1 Drying Pans, noncorrodible, stable at the temperature
obtained by D 2961 and D 3302 (that is, no bias is detected
used, and of such size that the sample can be spread to a depth
between the two methods at the 95% confidence level) for
of not more than 25 mm (1 in.).
moisture levels between 1.4% and 15.8%. These two test
5.1.1 The pan size may be varied to suit the size of the
methods were not compared in this study for some ranks of
sample and the oven. The height of the sides shall be no more
coal including lignite and anthracite. Supporting data has been
1
than 40 mm (1 ⁄2 in.) so that air is not restricted in passing over
filed at ASTM Headquarters and may be obtained by request-
the coal.
ing Research Report D05-1024.
5.2 Drying Oven, forced air-type capable of maintaining a
1.3 he values stated in SI units are to be regarded as the
temperature of 107 6 3°C and constructed to provide for a
standard.
continuous air flow to all parts of the oven.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
6. Sampling
responsibility of the user of this standard to establish appro-
6.1 The sample shall be prepared according to Test Method
priate safety and health practices and determine the applica-
D 2013 except that the 500 g portion can be further subdivided
bility of regulatory limitations prior to use.
to 125 g.
6.2 That portion of the sample used for the moisture
2. Referenced Documents
determination shall have a minimum weight of 125 g.
2.1 ASTM Standards:
7. Procedure
7.1 Weigh the empty drying pan. Record the mass in grams
1
as W . Transfer the sample from the sample container to the
This test method is under the jurisdiction of ASTM Committee D05 on Coal 1
and Coke and is the direct responsibility of Subcommittee D05.21 on Methods of drying pan. Distribute the sample uniformly over the pan. Do
Analysis.
Current edition approved Oct. 10, 2002. Published January 2003. Originally
published as D 2961 – 71 T. Last previous edition D 2961 – 01.
2
Annual Book of ASTM Standards, Vol 05.05.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
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.
D2961–02
not exceed a depth of 25 mm (1 in.). Place the empty sample
W = weight of coal plus pan plus sample container after
4
container in the drying pan.Weigh the drying pan, coal sample,
drying.
and empty sample container. Record the ma
...

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1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
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