ASTM D6347/D6347M-05

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Designation:D6347/D6347M–05
Standard Test Method for
Determination of Bulk Density of Coal Using Nuclear
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Backscatter Depth Density Methods
This standard is issued under the fixed designation D6347/D6347M; 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.
INTRODUCTION
Data obtained from the density of coal stockpiles is combined with volume determinations perTest
Method D6172 to complete the physical inventory of total tons. The book inventory is compared to
thephysicalinventoryfordeterminingtheaccumulationofmeasurementdifferencethathaveoccurred
since the last physical inventory.
Since the physical inventory is the reference value used to compare and adjust the book inventory,
it is important that the standard methods for conducting the density and volume measurements
introduce the least possible error. Close adherence to the details of the procedures described in this
standard is a prerequisite to the objective of this test method.
This standard test method for determination of bulk density of stockpiled coal is used for all ranks
of coal. Proper density determination involves an understanding of the physical characteristics of the
coal types and the stockpiling facilities.
1. Scope 2. Referenced Documents
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1.1 This test method covers procedures for determining the 2.1 ASTM Standards:
bulk density of coal using instrumentation that measures the D1586 Test Method for Penetration Test (SPT) and Split-
relative backscatter of nuclear gamma radiation throughout the Barrel Sampling of Soils
depth of the stockpile under test. D6172 Test Method for Determining the Volume of Bulk
1.2 This procedure is applicable to all ranks of coal. Materials Using Contours or Cross Sections Created by
1.3 The values stated in either SI units or inch-pound units Direct Operator Compilation Using Photogrammetric Pro-
are to be regarded separately as standard. The values stated in cedures
each system are not exact equivalents: therefore, each system 2.2 NIST Standard:
mustbeusedindependentoftheother.Withinthetext,SIunits National Institute for Standards and Technology Handbook
are shown in brackets. 44, Specifications, Tolerances, and Other Technical Re-
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1.4 This standard does not purport to address all of the quirements for Weighing and Measuring Devices
safety concerns, if any, associated with its use. It is the 2.3 ASME Standard:
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responsibility of the user of this standard to establish appro- ASME Pipe Codes
priate safety and health practices and determine the applica- 2.4 Code of Federal Regulations:
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bility of regulatory limitations prior to use. The equipment uses Title 10, Parts 19 and 20
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radioactive materials, which may be hazardous to the health of Title 49
users, unless proper precautions are taken.
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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.
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This test method is under the jurisdiction of ASTM Committee D05 on Coal Available from National Institute of Standards and Technology (NIST),
and Coke and is the direct responsibility of Subcommittee D 05.07 on Physical Gaithersburg, MD 20899.
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Characteristics of Coal. Available from American Society of Mechanical Engineers, 345 E. 47th St.,
CurrenteditionapprovedJune1,2005.PublishedJuly2005.Originallyapproved New York, NY 10017.
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in 1998. Last previous edition approved in 1999 as D6347/D6347M–99. DOI: Available from the U.S. Government Printing Office, Superintendent of
10.1520/D6347_D6347M-05. Documents, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6347/D6347M–05
3. Terminology
Penetrate compacted coal in calibration vessel 11.7
Minimum number of replicate test counts 11.8
3.1 Definitions of Terms:
Conduct a uniform compaction check 11.9
3.1.1 counting period—the period of time, set using the
Data for establishing calibration curve (Annex A3) 11.10
Develop calibration curve (Annex A3) 11.11
scaler time switch, during which the readout device accumu-
Separate calibration curve for each access method 11.12
lates pulses.
Interpretation of Results 12
3.1.2 test counts—the recording of pulses accumulated by Report 13
the readout device during a counting period. The test count is
5. Significance and Use
initiated by pushing a start button located on the scaler, which
resets the accumulator and starts a new counting pe
...