ASTM D6892-03(2008)
(Test Method)Standard Test Method for Pour Point of Petroleum Products (Robotic Tilt Method)
Standard Test Method for Pour Point of Petroleum Products (Robotic Tilt Method)
SIGNIFICANCE AND USE
The pour point of a petroleum product is an index of the lowest temperature of its utility for certain applications. Flow characteristics, such as pour point, can be critical for the correct operation of lubricating systems, fuel systems, and pipeline operations.
Petroleum blending operations require precise measurement of the pour point.
Test results from this test method can be determined at either 1 or 3°C intervals.
This test method yields a pour point in a format similar to Test Method D 97 or IP 15, when the 3°C interval results are reported.
Note 2—Since some users may wish to report their results in a format similar to Test Method D 97 or IP 15 (in 3°C intervals) the precision data were derived for the 3°C intervals. For statements on bias relative to Test Method D 97 or IP 15, see the research report.
This test method has comparable repeatability and better reproducibility relative to Test Method D 97 or IP 15 as measured in the 1998 interlaboratory program (see Section 13).
FIG. 1 Schematic of Cooling/Heating Block and Cooling Circulating Bath
SCOPE
1.1 This test method covers the determination of the pour point of petroleum products by an automatic instrument that tilts the test jar to detect movement of the surface of the test specimen with an optical device, after being removed from a regulated, stepped-bath cooling jacket.
1.2 This test method is designed to cover the range of temperatures from −57 to +51°C; however, the range of temperatures included in the 1998 interlaboratory test program only covered the temperature range from −51 to −11°C.
1.3 Test results from this test method can be determined at either 1 or 3°C testing intervals.
1.4 This test method is not intended for use with crude oils.
Note 1—The applicability of this test method on residual fuel samples has not been verified. For further information on the applicability, refer to 13.4.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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.
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Designation: D6892 − 03(Reapproved 2008)
Standard Test Method for
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Pour Point of Petroleum Products (Robotic Tilt Method)
This standard is issued under the fixed designation D6892; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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1. Scope 2.2 Energy Institute Standard:
IP15Test Method for Pour Point of Petroleum Products
1.1 This test method covers the determination of the pour
point of petroleum products by an automatic instrument that
3. Terminology
tilts the test jar to detect movement of the surface of the test
specimen with an optical device, after being removed from a 3.1 Definitions:
regulated, stepped-bath cooling jacket. 3.1.1 pour point, n—in petroleum products, the lowest
temperature at which movement of the test specimen is
1.2 This test method is designed to cover the range of
observed under prescribed conditions of test.
temperatures from −57 to +51°C; however, the range of
temperatures included in the 1998 interlaboratory test program 3.2 Definitions of Terms Specific to This Standard:
only covered the temperature range from −51 to −11°C. 3.2.1 no-flow point, n—in petroleum products, the tempera-
ture of the test specimen at which a wax crystal structure or
1.3 Test results from this test method can be determined at
viscosity increase, or both, impedes movement of the surface
either 1 or 3°C testing intervals.
of the test specimen under the conditions of the test.
1.4 This test method is not intended for use with crude oils.
3.2.1.1 Discussion—The no-flow point occurs when, upon
NOTE 1—The applicability of this test method on residual fuel samples
cooling, the formation of wax crystal structures or viscosity
has not been verified. For further information on the applicability, refer to
increase,orboth,hasprogressedtothepointwheretheapplied
13.4.
observation device no longer detects movement under the
1.5 The values stated in SI units are to be regarded as
conditions of the test. The preceding observation temperature
standard. No other units of measurement are included in this
at which flow of the test specimen is last observed is the pour
standard.
point.
1.6 This standard does not purport to address all of the
3.2.2 tilting, vt—technique of movement where the test jar
safety concerns, if any, associated with its use. It is the
in a vertical position is moved towards a horizontal position to
responsibility of the user of this standard to establish appro-
induce specimen movement.
priate safety and health practices and determine the applica-
3.2.2.1 Discussion—When the test jar is tilted and held in a
bility of regulatory limitations prior to use.
horizontal position for 5 s without detection of movement of
the surface of the specimen, this is the no-flow point and the
2. Referenced Documents
test is complete.
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2.1 ASTM Standards:
D97Test Method for Pour Point of Petroleum Products 4. Summary of Test Method
D4057Practice for Manual Sampling of Petroleum and
4.1 After insertion of the specimen into the automatic pour
Petroleum Products
point apparatus and initiation of the testing program, the
D4177Practice for Automatic Sampling of Petroleum and
specimen is heated and then cooled according to a prescribed
Petroleum Products
profile. The specimen surface is examined periodically for
movement using an optical camera system mounted on top of
the specimen test jar, while tilting the specimen test jar. The
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This test method is under the jurisdiction of ASTM Committee D02 on test jar is removed from the jacketed cooling chamber prior to
PetroleumProductsandLubricantsandisthedirectresponsibilityofSubcommittee
eachexamination.Thelowesttemperature,whenmovementof
D02.07 on Flow Properties.
the surface of the specimen is detected, is recorded as the pour
Current edition approved Dec. 15, 2008. Published February 2009.Originally
point determined by this Test Method D6892.
approved in 2003. Last previous edition approved in 2003 as D6892–03. DOI:
10.1520/D6892-03R08.
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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
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Standards volume information, refer to the standard’s Document Summary page on Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
the ASTM website. U.K., http://www.energyinst.org.uk.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D6892 − 03 (2008)
FIG. 1 Schematic of Cooling/Heating Block and Cooling Circulating Bath
5. Significance and Use
5.1 The
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