ASTM D2416-20
(Test Method)Standard Test Method for Coking Value of Tar and Pitch (Modified Conradson)
Standard Test Method for Coking Value of Tar and Pitch (Modified Conradson)
SIGNIFICANCE AND USE
4.1 This test method is useful for indicating the relative coke-forming propensities and for evaluating and characterizing tars and pitches. This test method can also be used as one element in establishing the uniformity of shipments or sources of supply.
SCOPE
1.1 This test method covers the determination of the coking value of tar and pitch having an ash content not over 0.5 % as determined by Test Method D2415.
1.2 Coking values by this test method are practically the same as those obtained by Test Method D189, but results are more reproducible. The apparatus used is identical, except that an electric furnace is substituted for the gas flame.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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
Relations
Buy Standard
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: D2416 −20
Standard Test Method for
1
Coking Value of Tar and Pitch (Modified Conradson)
This standard is issued under the fixed designation D2416; 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* 3. Summary of Test Method
1.1 This test method covers the determination of the coking 3.1 A sample of the tar or pitch is vaporized and pyrolized
value of tar and pitch having an ash content not over 0.5 % as for a specified time at a specified temperature in special
standardized equipment that limits the available oxygen sup-
determined by Test Method D2415.
ply. The percentage of residue is reported as the coking value.
1.2 Coking values by this test method are practically the
same as those obtained by Test Method D189, but results are
4. Significance and Use
more reproducible. The apparatus used is identical, except that
4.1 This test method is useful for indicating the relative
an electric furnace is substituted for the gas flame.
coke-forming propensities and for evaluating and characteriz-
1.3 The values stated in SI units are to be regarded as
ing tars and pitches. This test method can also be used as one
standard. No other units of measurement are included in this
element in establishing the uniformity of shipments or sources
standard.
of supply.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus (see Fig. 1)
responsibility of the user of this standard to establish appro-
5.1 Crucible—Wide-form, a, either porcelain, glazed
priate safety, health, and environmental practices and deter-
throughout, or silica, a; 29 mL to 31 mL capacity, 46 mm to
mine the applicability of regulatory limitations prior to use.
49 mm in rim diameter.
1.5 This international standard was developed in accor-
5.2 Skidmore Crucible—Iron crucible, b, flanged and
dance with internationally recognized principles on standard-
ringed, 65 mL to 82 mL capacity, 53 mm to 57 mm inside and
ization established in the Decision on Principles for the
60 mm to 67 mm outside diameter of flange, 37 mm to 39 mm
Development of International Standards, Guides and Recom-
in height, supplied with a cover without delivery tubes and
mendations issued by the World Trade Organization Technical
having the vertical opening closed. The horizontal opening of
Barriers to Trade (TBT) Committee.
about 6.5 mm shall be kept clean. The outside diameter of the
flat bottom shall be 30 mm to 32 mm.
2. Referenced Documents
2
5.3 Metal Crucible—Spun sheet-iron or nickel crucible, c,
2.1 ASTM Standards:
with cover; 78 mm to 82 mm in outside diameter at the top,
D140 Practice for Sampling Asphalt Materials
58 mm to 60 mm in height, and approximately 0.8 mm in
D189 Test Method for Conradson Carbon Residue of Petro-
thickness.At the bottom of this crucible, and level before each
leum Products
test,shallbealayerofabout25 mLofsand,orenoughtobring
D370 Practice for Dehydration of Oil-Type Preservatives
the Skidmore crucible, with cover on, nearly to the top of the
D2415 Test Method for Ash in Coal Tar and Pitch
sheet-iron crucible. The sand shall be dry and screened to pass
E11 Specification for Woven Wire Test Sieve Cloth and Test
through a 70 mesh (212 µm) screen and to be retained on a 200
Sieves
mesh (75 µm) screen.
5.4 WireSupport—Triangle (65 mm) of bare Nichrome wire
1.5 mm to 2.0 mm in cross section, having an opening small
1
This test method is under the jurisdiction of ASTM Committee D02 on
enough to support the bottom of the metal crucible (see 5.3).
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
SubcommitteeD02.05onPropertiesofFuels,PetroleumCokeandCarbonMaterial.
The triangle, d, shall have its arms bent to form a cradle that
Current edition approved June 1, 2020. Published June 2020. Originally
will support the metal crucible with its bottom level with the
ɛ1
approved in 1965. Last previous edition approved in 2015 as D2416 – 84 (2015) .
bottom of the insulator (see 5.6).
DOI: 10.1520/D2416-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.5 Hood—Circular, sheet-iron, e, from 120 mm to 130 mm
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in diameter, the height of the lower perpendicular side to be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. from 50 mm to 53 mm; provid
...
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.
´1
Designation: D2416 − 84 (Reapproved 2015) D2416 − 20
Standard Test Method for
1
Coking Value of Tar and Pitch (Modified Conradson)
This standard is issued under the fixed designation D2416; 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
ε NOTE—SI units formatting was corrected editorially in May 2015.
1. Scope Scope*
1.1 This test method covers the determination of the coking value of tar and pitch having an ash content not over 0.5 % as
determined by Test Method D2415.
1.2 Coking values by this test method are practically the same as those obtained by Test Method D189, but results are more
reproducible. The apparatus used is identical, except that an electric furnace is substituted for the gas flame.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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:
D140 Practice for Sampling Asphalt Materials
D189 Test Method for Conradson Carbon Residue of Petroleum Products
D370 Practice for Dehydration of Oil-Type Preservatives
D2415 Test Method for Ash in Coal Tar and Pitch
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Summary of Test Method
3.1 A sample of the tar or pitch is vaporized and pyrolized for a specified time at a specified temperature in special standardized
equipment that limits the available oxygen supply. The percentage of residue is reported as the coking value.
4. Significance and Use
4.1 This test method is useful for indicating the relative coke-forming propensities and for evaluating and characterizing tars
and pitches. This test method can also be used as one element in establishing the uniformity of shipments or sources of supply.
5. Apparatus (see Fig. 1)
5.1 Crucible—Wide-form, a, either porcelain, glazed throughout, or silica, a; 29 mL to 31 mL capacity, 46 mm to 49 mm in rim
diameter.
5.2 Skidmore Crucible—Iron crucible, b, flanged and ringed, 65 mL to 82 mL capacity, 53 mm to 57 mm inside and 60 mm to
67 mm outside diameter of flange, 37 mm to 39 mm in height, supplied with a cover without delivery tubes and having the vertical
opening closed. The horizontal opening of about 6.5 mm shall be kept clean. The outside diameter of the flat bottom shall be
30 mm to 32 mm.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.
Current edition approved April 1, 2015June 1, 2020. Published May 2015June 2020. Originally approved in 1965. Last previous edition approved in 20092015 as
ɛ1
D2416 – 84 (2009).(2015) . DOI: 10.1520/D2416-84R15E01.10.1520/D2416-20.
2
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.
*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 ----------------------
D2416 − 20
FIG. 1 Apparatus for Determining Carbon Residue
5.3 Metal Crucible—Spun sheet-iron or nickel crucible, c, with cover; 78 mm to 82 mm in outside diameter at the top, 58 mm
to 60 mm in height, and approximately 0.8 mm in thickness. At the bottom of this crucible, and level before each test, shall be a
layer of about 25 mL of sand, or enough to bring the Skidmore crucible, with cover on, nearly to the top of the sheet-iron crucible.
The
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.