ASTM E790-21

Standard Test Method for Residual Moisture in Refuse-Derived Fuel Analysis Samples

SIGNIFICANCE AND USE
5.1 The procedure in this test method for a sample as specified herein is intended for the purpose of determining the residual moisture present in a RDF analysis sample.  
5.2 The residual moisture value is used to correct as-determined analysis results such as gross heating value, sulfur, and ash to dry sample basis results.
SCOPE
1.1 This test method covers the measurement of residual moisture in refuse-derived fuel (RDF) analysis samples. It is used to calculate on a dry basis other determinations performed on analysis RDF samples. It is used with air-dry moisture results to calculate total moisture (Note 1). The total moisture is used to calculate as-received values or other analyses performed on a sample.  
Note 1: In some instances, RDF moisture may change during size-reduction steps of the RDF analysis sample preparation procedure. This moisture change, unless suitable corrections are made, will affect the accuracy of the total moisture value as calculated from the air-dry and residual moisture results.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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. For more specific precautionary information, see Section 7.  
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: 30-Apr-2021
• ICS: 75.160.10 - Solid fuels
• Technical Committee: D34 - Waste Management
• Drafting Committee: D34.03 - Treatment, Recovery and Reuse

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: E790 − 21
Standard Test Method for
Residual Moisture in Refuse-Derived Fuel Analysis
1
Samples
This standard is issued under the fixed designation E790; 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 D5681 Terminology for Waste and Waste Management
D6044 Guide for Representative Sampling for Management
1.1 This test method covers the measurement of residual
of Waste and Contaminated Media
moisture in refuse-derived fuel (RDF) analysis samples. It is
E180 Practice for Determining the Precision of ASTM
usedtocalculateonadrybasisotherdeterminationsperformed
Methods for Analysis and Testing of Industrial and Spe-
on analysis RDF samples. It is used with air-dry moisture
3
cialty Chemicals (Withdrawn 2009)
results to calculate total moisture (Note 1). The total moisture
E829 Practice for Preparing Refuse-Derived Fuel (RDF)
is used to calculate as-received values or other analyses
Laboratory Samples for Analysis
performed on a sample.
NOTE 1—In some instances, RDF moisture may change during size-
3. Terminology
reduction steps of the RDF analysis sample preparation procedure. This
3.1 For definitions of terms used in this test method, refer to
moisture change, unless suitable corrections are made, will affect the
accuracy of the total moisture value as calculated from the air-dry and
Terminology D5681.
residual moisture results.
4. Summary of Test Method
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
4.1 This test method is based on the weight loss of an
standard.
air-dried analysis RDF sample under rigidly controlled condi-
1.3 This standard does not purport to address all of the tions of temperature, time, and air flow.
safety concerns, if any, associated with its use. It is the
4.2 The total moisture is calculated from the loss or gain
responsibility of the user of this standard to establish appro-
uponsampleairdryingandtheresidualmoistureasdetermined
priate safety, health, and environmental practices and deter-
by this test method.
mine the applicability of regulatory limitations prior to use.
For more specific precautionary information, see Section 7.
5. Significance and Use
1.4 This international standard was developed in accor-
5.1 The procedure in this test method for a sample as
dance with internationally recognized principles on standard-
specified herein is intended for the purpose of determining the
ization established in the Decision on Principles for the
residual moisture present in a RDF analysis sample.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.2 The residual moisture value is used to correct as-
Barriers to Trade (TBT) Committee. determined analysis results such as gross heating value, sulfur,
and ash to dry sample basis results.
2. Referenced Documents
2
2.1 ASTM Standards: 6. Apparatus
D3173 Test Method for Moisture in the Analysis Sample of
6.1 Drying Oven:
Coal and Coke
6.1.1 RefereeType—The oven shall be constructed to have a
uniform temperature within the specimen chamber, have a
1
This test method is under the jurisdiction of ASTM Committee D34 on Waste
minimum excess air volume, and be capable of constant
Management and is the direct responsibility of Subcommittee D34.03 on Treatment,
temperature regulation at 107 6 3 °C. Provision shall be made
Recovery and Reuse.
for renewing the preheated air in the oven at the rate of two to
Current edition approved May 1, 2021. Published May 2021. Originally
approved in 1981. Last previous edition approved in 2015 as E790 – 15. DOI: four times the oven air volume a minute, with the intake air
10.1520/E0790-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
1

---------------------- Page: 1 ----------------------
E790 − 21
dried by passing through a desiccant. An oven similar to the 8.2 The sampling method used to collect samples for this
one illustrated in Fig. 1 of Test Method D3173 is suitable. procedure should be based on agre
...

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: E790 − 15 E790 − 21
Standard Test Method for
Residual Moisture in Refuse-Derived Fuel Analysis
1
Samples
This standard is issued under the fixed designation E790; 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 the measurement of residual moisture in refuse-derived fuel (RDF) analysis samples. It is used to
calculate on a dry basis other determinations performed on analysis RDF samples. It is used with air-dry moisture results to
calculate total moisture (Note 1). The total moisture is used to calculate as-received values or other analyses performed on a
sample.
NOTE 1—In some instances, RDF moisture may change during size-reduction steps of the RDF analysis sample preparation procedure. This moisture
change, unless suitable corrections are made, will affect the accuracy of the total moisture value as calculated from the air-dry and residual moisture
results.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For more specific precautionary information, see Section 7.
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
2
2.1 ASTM Standards:
D3173 Test Method for Moisture in the Analysis Sample of Coal and Coke
D5681 Terminology for Waste and Waste Management
D6044 Guide for Representative Sampling for Management of Waste and Contaminated Media
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
3
(Withdrawn 2009)
E829 Practice for Preparing Refuse-Derived Fuel (RDF) Laboratory Samples for Analysis
3. Terminology
3.1 For definitions of terms used in this test method, refer to Terminology D5681.
1
This test method is under the jurisdiction of ASTM Committee D34 on Waste Management and is the direct responsibility of Subcommittee D34.03 on Treatment,
Recovery and Reuse.
Current edition approved Sept. 1, 2015May 1, 2021. Published September 2015May 2021. Originally approved in 1981. Last previous edition approved in 20082015 as
E790 – 08.E790 – 15. DOI: 10.1520/E0790-15.10.1520/E0790-21.
2
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.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E790 − 21
4. Summary of Test Method
4.1 This test method is based on the weight loss of an air-dried analysis RDF sample under rigidly controlled conditions of
temperature, time, and air flow.
4.2 The total moisture is calculated from the loss or gain upon sample air drying and the residual moisture as determined by this
test method.
5. Significance and Use
5.1 The procedure in this test method for a sample as specified herein is intended for the purpose of determining the residual
moisture present in a RDF analysis sample.
5.2 The residual moisture value is used to correct as-determined analysis results such as gross heating value, sulfur, and ash to
dry sample basis results.
6. Apparatus
6.1 Drying Oven:
6.1.1 Referee Type—The oven shall be constructed to have a uniform temperature within the specimen chamber, have a minimum
excess air volume, and be capable of constant temperature regulation at 107 6 3°C.3 °C. Provision shall be made for renewing
the preheated air in the oven at the rate of two to four times the oven air volume a minute, with the intake air
...