ASTM D4715-98(2017)
(Test Method)Standard Test Method for Coking Value of Tar and Pitch (Alcan)
Standard Test Method for Coking Value of Tar and Pitch (Alcan)
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. The 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 higher than those obtained by Test Method D2416. See the bias statement in Section 13.
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
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Designation: D4715 − 98 (Reapproved 2017)
Standard Test Method for
1
Coking Value of Tar and Pitch (Alcan)
This standard is issued under the fixed designation D4715; 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 Atest portion of the tar or pitch is heated for a specified
value of tar and pitch having an ash content not over 0.5 %, as time at 550 °C 6 10 °C in an electric furnace. The percentage
of residue is reported as the coking value.
determined by Test Method D2415.
1.2 Coking values by this test method are higher than those
4. Significance and Use
obtained by Test Method D2416. See the bias statement in
4.1 This test method is useful for indicating the relative
Section 13.
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. The 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
5. Apparatus
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5.1 Porcelain Crucible, tall form, 30 mL capacity, height of
priate safety, health, and environmental practices and deter- 37 mm and diameter 43 mm, with lids of the overlapping type.
mine the applicability of regulatory limitations prior to use.
5.2 Nickel Crucible, 100 mL to 130 mL capacity, height of
1.5 This international standard was developed in accor-
64 mm and diameter of 60 mm, with lids.
dance with internationally recognized principles on standard-
5.3 Wire Support—Stainless steel wire support, fitting into
ization established in the Decision on Principles for the
the nickel crucible, used to keep the porcelain crucible (5.1)in
Development of International Standards, Guides and Recom-
place within the nickel crucible (5.2). This support shall allow
mendations issued by the World Trade Organization Technical
a separation of 10 mm 6 1 mm between the bases of the two
Barriers to Trade (TBT) Committee.
crucibles (see Fig. 1).
2. Referenced Documents 5.4 Crucible Tray—A suitable crucible tray to support the
2 nickel crucibles should be made so that there is at least 7 mm
2.1 ASTM Standards:
of space between the bottom of the crucible and the base of the
D850 Test Method for Distillation of Industrial Aromatic
furnace.
Hydrocarbons and Related Materials
D2415 Test Method for Ash in Coal Tar and Pitch 5.5 Electric Furnace, capable of being controlled at 550 °C
6 10 °C.
D2416 Test Method for Coking Value of Tar and Pitch
(Modified Conradson)
5.6 Sieves—1 mm (U.S. Standard No. 18), 300 µm
D4296 Practice for Sampling Pitch
(U.S. Standard No. 50) and 212 µm (U.S. Standard No. 70),
E11 Specification for Woven Wire Test Sieve Cloth and Test
conforming to Specification E11.
Sieves
6. Reagents and Materials
6.1 Calcined Petroleum Coke—Use the fraction which
1
This test method is under the jurisdiction of ASTM Committee D02 on passes a 1 mm mesh sieve (U.S. Standard No. 18) and is
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
retained by a 212 µm mesh sieve (U.S. Standard No. 70).
SubcommitteeD02.05onPropertiesofFuels,PetroleumCokeandCarbonMaterial.
Current edition approved Oct. 1, 2017. Published November 2017. Originally
7. Bulk Sampling
approved in 1987. Last previous edition approved in 2012 as D4715 – 98 (2012).
DOI: 10.1520/D4715-98R17.
7.1 Samples from shipments shall be taken in accordance
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
with Practice D4296, and shall be free of foreign substances.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Thoroughly mix the sample immediately before removing a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. representative portion for the determination or for dehydration.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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---------------------- Page: 1 ----------------------
D4715 − 98 (2017)
10.2 Heat a clean porcelain crucible with its lid in the
electric furnace, controlled at 550 °C 6 10 °C, for 2 h. After
cooling to ambient temperature in a desiccator, weigh to the
nearest 1 mg.
10.3 Weigh into the crucible, to the nearest 1 mg, a repre-
sentativeportionof1 g 60.05 goft
...
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: D4715 − 98 (Reapproved 2012) D4715 − 98 (Reapproved 2017)
Standard Test Method for
1
Coking Value of Tar and Pitch (Alcan)
This standard is issued under the fixed designation D4715; 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 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 higher than those obtained by Test Method D2416. See the bias statement in Section
13.
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:
D850 Test Method for Distillation of Industrial Aromatic Hydrocarbons and Related Materials
D2415 Test Method for Ash in Coal Tar and Pitch
D2416 Test Method for Coking Value of Tar and Pitch (Modified Conradson)
D4296 Practice for Sampling Pitch
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Summary of Test Method
3.1 A test portion of the tar or pitch is heated for a specified time at 550550 °C 6 10°C10 °C in an electric furnace. 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. The test method can also be used as one element in establishing the uniformity of shipments or sources of supply.
5. Apparatus
5.1 Porcelain Crucible, tall form, 30 mL 30 mL capacity, height of 37 mm 37 mm and diameter 43 mm, 43 mm, with lids of
the overlapping type.
5.2 Nickel Crucible, 100100 mL to 130 mL 130 mL capacity, height of 64 mm 64 mm and diameter of 60 mm, 60 mm, with
lids.
5.3 Wire Support—Stainless steel wire support, fitting into the nickel crucible, used to keep the porcelain crucible (5.1) in place
within the nickel crucible (5.2). This support shall allow a separation of 1010 mm 6 1 mm 1 mm between the bases of the two
crucibles (see Fig. 1).
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 Nov. 1, 2012Oct. 1, 2017. Published November 2012November 2017. Originally approved in 1987. Last previous edition approved in 20082012
ε1
as D4715–98(2008)D4715 – 98 (2012). . DOI: 10.1520/D4715-98R12.10.1520/D4715-98R17.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4715 − 98 (2017)
FIG. 1 Assembly of Nickel and Porcelain Crucibles
5.4 Crucible Tray—A suitable crucible tray to support the nickel crucibles should be made so that there is at least 7 mm 7 mm
of space between the bottom of the crucible and the base of the furnace.
5.5 Electric Furnace, capable of being controlled at 550550 °C 6 10°C.10 °C.
5.6 Sieves—1 mm 1 mm (U.S. Standard No. 18), 300-μm (U.S. Standard 300 μm (U.S. Standard No. 50) and 212−μm212 μm
(U.S. Standard No. 70), conforming to Specification E11.
6. Reagents and Materials
6.1 Calcined Petroleum Coke—Use the fraction which passes a 1-mm1 mm mesh sieve (U.S. Standard No. 18) and is retained
by a 212−μm212 μm mesh sieve (U.S. Standard N
...
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