ASTM D1412/D1412M-20

Standard Test Method for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30 °C

SIGNIFICANCE AND USE
3.1 This test method affords a means of estimating the inherent moisture of either coal that is wet and shows visible surface moisture or coal that may have lost some moisture. It may be used for estimating the surface, or extraneous moisture of wet coal, such moisture being the difference between the total moisture as determined by Test Method D3302 and the equilibrium moisture.  
3.2 When samples are collected in conformity with Classification D388, the equilibrium moisture is considered to be equal to bed moisture with the exception of some low rank coals that yield equilibrium moisture values below bed moisture.  
3.3 The results obtained by this test method are sensitive to many influences, and therefore, raw (uncorrected) equilibrium moisture data may be of limited value in and of themselves. When working with low rank coals, the results yielded by this test method require critical assessments. It is recommended that the procedure outlined in the Appendix X1 be applied, and the results corrected before use in situations where a more reliable estimation inherent or bed moisture for low rank coals is required. The Appendix also provides useful quality assurance information which is applicable to coals of all ranks.
SCOPE
1.1 This test method covers determination of the equilibrium moisture of coal in an atmosphere over a saturated solution of potassium sulfate at 30 °C.
Note 1: For information concerning the experimental work on which this test method is based, see (1-5).2  
1.2 Units—The values stated in either SI units or non-SI 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.  
1.3 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.  
1.4 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: 14-Sep-2020
• ICS: 73.040 - Coals
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.21 - Methods of Analysis

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: D1412/D1412M − 20
Standard Test Method for
Equilibrium Moisture of Coal at 96 to 97 Percent Relative
1
Humidity and 30 °C
This standard is issued under the fixed designation D1412/D1412M; 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* D3172 Practice for Proximate Analysis of Coal and Coke
D3173 Test Method for Moisture in the Analysis Sample of
1.1 This test method covers determination of the equilib-
Coal and Coke
rium moisture of coal in an atmosphere over a saturated
D3302 Test Method for Total Moisture in Coal
solution of potassium sulfate at 30 °C.
D4239 Test Method for Sulfur in the Analysis Sample of
NOTE 1—For information concerning the experimental work on which
Coal and Coke Using High-Temperature Tube Furnace
2
this test method is based, see (1-5).
Combustion
1.2 Units—The values stated in either SI units or non-SI
D4596 Practice for Collection of Channel Samples of Coal
units are to be regarded separately as standard. The values
in a Mine
stated in each system are not necessarily exact equivalents;
D5865 Test Method for Gross Calorific Value of Coal and
therefore, to ensure conformance with the standard, each
Coke
system shall be used independently of the other, and values
E177 Practice for Use of the Terms Precision and Bias in
from the two systems shall not be combined.
ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to
1.3 This standard does not purport to address all of the
Determine the Precision of a Test Method
safety concerns, if any, associated with its use. It is the
4
responsibility of the user of this standard to establish appro-
2.2 ISO Standards:
priate safety, health, and environmental practices and deter-
ISO 5725-4 Accuracy (Trueness and Precision) of Measure-
mine the applicability of regulatory limitations prior to use.
ment Methods and Results—Part 4: Basic Methodsforthe
1.4 This international standard was developed in accor-
DeterminationoftheTruenessofaStandardMeasurement
dance with internationally recognized principles on standard-
Method
ization established in the Decision on Principles for the
ISO 5725-6 Accuracy (Trueness and Precision) of Measure-
Development of International Standards, Guides and Recom-
ment Methods and Results—Part 6: Use in Practice of
mendations issued by the World Trade Organization Technical
Accuracy Values
Barriers to Trade (TBT) Committee.
3. Significance and Use
2. Referenced Documents
3 3.1 This test method affords a means of estimating the
2.1 ASTM Standards:
inherent moisture of either coal that is wet and shows visible
D121 Terminology of Coal and Coke
surface moisture or coal that may have lost some moisture. It
D388 Classification of Coals by Rank
may be used for estimating the surface, or extraneous moisture
D2013 Practice for Preparing Coal Samples for Analysis
of wet coal, such moisture being the difference between the
D2234/D2234M Practice for Collection of a Gross Sample
total moisture as determined by Test Method D3302 and the
of Coal
equilibrium moisture.
3.2 When samples are collected in conformity with Classi-
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 fication D388, the equilibrium moisture is considered to be
Analysis.
equal to bed moisture with the exception of some low rank
Current edition approved Sept. 15, 2020. Published September 2020. Originally
coals that yield equilibrium moisture values below bed mois-
approvedin1956.Lastpreviouseditionapprovedin2019asD1412/D1412M – 19b.
ture.
DOI: 10.1520/D1412_D1412M-20.
2
The boldface numbers in parentheses refer to the list of references at the end of
this standard.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from International Organization for Standardization (ISO), ISO
Standards volume information, refer to the standard’s Document Summary page on Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,
the ASTM website. Geneva, Switzerland, http://www.iso.org.
*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 ----------------------
D1412/D1412M − 20
3.3 The result
...

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: D1412/D1412M − 19b D1412/D1412M − 20
Standard Test Method for
Equilibrium Moisture of Coal at 96 to 97 Percent Relative
1
Humidity and 30 °C
This standard is issued under the fixed designation D1412/D1412M; 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 test method covers determination of the equilibrium moisture of coal in an atmosphere over a saturated solution of
potassium sulfate at 30 °C.
2
NOTE 1—For information concerning the experimental work on which this test method is based, see (1-5).
1.2 Units—The values stated in either SI units or non-SI 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.
1.3 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.
1.4 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
D388 Classification of Coals by Rank
D2013 Practice for Preparing Coal Samples for Analysis
D2234/D2234M Practice for Collection of a Gross Sample of Coal
D3172 Practice for Proximate Analysis of Coal and Coke
D3173 Test Method for Moisture in the Analysis Sample of Coal and Coke
D3302 Test Method for Total Moisture in Coal
D4239 Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace Combustion
D4596 Practice for Collection of Channel Samples of Coal in a Mine
D5865 Test Method for Gross Calorific Value of Coal and Coke
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
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, 2019Sept. 15, 2020. Published November 2019September 2020. Originally approved in 1956. Last previous edition approved in 2019
as D1412/D1412M – 19a.D1412/D1412M – 19b. DOI: 10.1520/D1412_D1412M-19B.10.1520/D1412_D1412M-20.
2
The boldface numbers in parentheses refer to the list of references at the end of this standard.
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

---------------------- Page: 1 ----------------------
D1412/D1412M − 20
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
4
2.2 ISO Standards:
ISO 5725-4 Accuracy (Trueness and Precision) of Measurement Methods and Results—Part 4: Basic Methods for the
Determination of the Trueness of a Standard Measurement Method
ISO 5725-6 Accuracy (Trueness and Precision) of Measurement Methods and Results—Part 6: Use in Practice of Accuracy
Values
3. Significance and Use
3.1 This test method affords a means of estimating the inherent moisture of either coal that is wet and shows visible surface
moisture or coal that may have lost some moisture. It may be used for estimating the surface, or extraneous moisture of wet coal,
such moisture being the difference between the total moisture as determined by Test Method D3302 and the equilibrium moisture.
3.2 When samples are collected in conformity with Classification D388, the equilibrium moisture is considered to be equal to bed
moisture with the exception of some low rank coals that yield equilibrium moisture values below bed moistur
...