ASTM C783-85(2000)

Standard Practice for Core Sampling of Graphite Electrodes

SCOPE
1.1 This practice was developed for electric-arc furnace graphite electrodes, and covers a procedure and equipment for obtaining core samples from electrodes in a manner that does not destroy the electrode nor prevent its subsequent use as originally intended. However, the minimum electrode diameter, for which extraction of a core sample using this practice does not influence subsequent use, is influenced by the particular application and must be determined by the user. Graphite electrodes for use in electric arc furnaces are usually solid cylinders of graphite with threaded sockets machined in each end.  
1.2 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.  Note 1-The following ASTM standards are noted as sources of useful information: Test Methods C559, C611, C651, C747, C1025, and C1039.

General Information

• Status: Historical
• Publication Date: 09-Apr-2000
• ICS: 71.100.99 - Other products of the chemical industry
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.F0 - Manufactured Carbon and Graphite Products

Relations

• Replaced By: ASTM C783-85(2005) - Standard Practice for Core Sampling of Graphite Electrodes
• Effective Date: 01-Jun-2005
• Referred By: ASTM C1025-15(2020) - Standard Test Method for Modulus of Rupture in Bending of Electrode Graphite
• Effective Date: 10-Apr-2000
• Referred By: ASTM D5679-16 - Standard Practice for Sampling Consolidated Solids in Drums or Similar Containers
• Effective Date: 10-Apr-2000
• Referred By: ASTM C1039-85(2020)e1 - Standard Test Methods for Apparent Porosity, Apparent Specific Gravity, and Bulk Density of Graphite Electrodes
• Effective Date: 10-Apr-2000
• Referred By: ASTM D6063-11(2018) - Standard Guide for Sampling of Drums and Similar Containers by Field Personnel
• Effective Date: 10-Apr-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation:C 783–85(Reapproved2000)
Standard Practice for
Core Sampling of Graphite Electrodes
This standard is issued under the fixed designation C 783; 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 3. Terminology
1.1 This practice was developed for electric-arc furnace 3.1 Definitions:
graphite electrodes, and covers a procedure and equipment for 3.1.1 core sample— the portion of graphite obtained from
obtaining core samples from electrodes in a manner that does an electrode by use of a sampling device such as described in
not destroy the electrode nor prevent its subsequent use as 4.1.
originally intended. However, the minimum electrode diam- 3.1.2 test specimen—an article prepared from a core
eter, for which extraction of a core sample using this practice sample.
does not influence subsequent use, is influenced by the par-
4. Significance and Use
ticular application and must be determined by the user.
Graphite electrodes for use in electric arc furnaces are usually 4.1 Core sampling is an acceptable way of obtaining a test
specimen without destroying the usefulness of the electrode.
solid cylinders of graphite with threaded sockets machined in
each end. 4.1.1 Test specimens obtained by this practice can be used
byproducersandusersofgraphiteelectrodesforthepurposeof
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the conducting the tests in Note 1 to obtain comparative physical
properties.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 4.2 This practice may not provide a test specimen of the
appropriatesize(withrespecttoparticlesize/sampledimension
bility of regulatory limitations prior to use.
ratios) to allow the determination of absolute property values.
NOTE 1—The followingASTM standards are noted as sources of useful
information: Test Methods C 559, C 611, C 651, C 747, C 1025, and
5. Apparatus
C 1039.
5.1 Core Drill Bit, similar to that shown in Fig. 1, driven by
2. Referenced Documents
suitable equipment.
2.1 ASTM Standards:
6. Procedure
C 559 Test Method for Bulk Density by Physical Measure-
ment of Manufactured Carbon and Graphite Articles NOTE 2—When core sampling a machined electrode, use caution to
prevent damage to the socket threads and remove all dust from the threads
C 611 Test Method for Electrical Resistivity of Manufac-
2 when the coring operation is finished.
tured Carbon and GraphiteArticles at Room Temperature
6.1 The core sample shall be taken from either end of the
C 651 Test Method for Flexur
...