ASTM D5950-96
(Test Method)Standard Test Method for Pour Point of Petroleum Products (Automatic Tilt Method)
Standard Test Method for Pour Point of Petroleum Products (Automatic Tilt Method)
SCOPE
1.1 This test method covers the determination of pour point of petroleum products by an automatic instrument that tilts the test jar during cooling and detects movement of the surface of the test specimen with an optical device.
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 1992 interlaboratory test program only covered the temperature range from -39 to +6°C, and the range of temperatures included in the 1998 interlaboratory test program was -51 to -11°C. (see 13.4).
1.3 Test results from this test method can be determined at 1 or 3°C 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 applicability, refer to 13.4.
1.5 The values stated in SI units are regarded as 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.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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.
Designation: D 5950 – 96 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
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Pour Point of Petroleum Products (Automatic Tilt Method)
This standard is issued under the fixed designation D 5950; 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.
INTRODUCTION
This test method covers an alternative procedure for the determination of Test Method D 97/IP15
using an automatic apparatus. The results from this test method based on observations at 3°C
temperature intervals have been found to be equivalent to Test Method D 97/IP15. When specification
requires Test Method D 97/IP15, do not substitute this test method.
1. Scope 3. Terminology
1.1 This test method covers the determination of pour point
3.1 Definitions:
of petroleum products by an automatic instrument that tilts the
3.1.1 pour point, n—in petroleum products, the lowest
test jar during cooling and detects movement of the surface of
temperature at which movement of the test specimen is
the test specimen with an optical device.
observed under the prescribed conditions of this test method.
1.2 This test method includes the range of temperatures
3.2 Definitions of Terms Specific to This Standard:
from −57 to +51°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
NOTE 1—The range of temperatures which was included in the (1992)
viscosity increase, or both, impedes movement of the surface
interlaboratory test program only covered the temperature range from −39
to +6°C (13.4). of the test specimen under the conditions of the test.
3.2.1.1 Discussion—The no-flow point occurs when, upon
1.3 Test results from this test method can be determined at
cooling, the formation of wax crystal structures or the viscosity
1, 2, and 3°C intervals.
increase, or both, has progressed to the point where the applied
1.4 This test method is not intended for use with crude oils.
observation device no longer detects movement under the
1.5 The values stated in SI units are regarded as standard.
conditions of the test. The preceding observation temperature,
1.6 This standard does not purport to address all of the
at which flow of the test specimen is last observed, is the pour
safety concerns, if any, associated with its use. It is the
point.
responsibility of the user of this standard to establish appro-
3.2.2 D 97/IP15 equivalent pour point, n—in petroleum
priate safety and health practices and determine the applica-
products, the temperature calculated by rounding the no-flow
bility of regulatory limitations prior to use.
point of the test specimen to the next higher integer which is a
multiple of 3°C.
2. Referenced Documents
3.2.2.1 Discussion—Test results from this test method can
2.1 ASTM Standards:
be determined at 1, 2, and 3°C intervals. Should the user wish
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D 97 Test Method for Pour Point of Petroleum Products
to provide results with a similar format to Test Method
D 4057 Practice for Manual Sampling of Petroleum and
D 97/IP15, then testing at 3°C intervals shall be used.
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Petroleum Products
3.2.3 tilting—technique of movement where the test jar in a
D 4177 Practice for Automatic Sampling of Petroleum and
vertical position is moved towards a horizontal position to
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Petroleum Products
induce specimen movement.
2.2 IP Standard:
4 3.2.3.1 Discussion—When the test jar is tilted and held in a
IP15 Test Method for Pour Point of Petroleum Products
horizontal position for 5 s without detection of specimen
movement, this is the no-flow point and the test is complete.
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This test method is under the jurisdiction of ASTM Committee D-2 on
4. Summary of Test Method
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
4.1 After preliminary heating, the test specimen is inserted
D02.07.OD on Wax Related Viscometric Properties of Fuels and Oils.
Current edition approved Apr. 10, 1996. Published June 1996.
into the automatic pour point apparatus. After starting the
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Annual Book of ASTM Standards, Vol 05.01.
program, the specimen is cooled according to the cooling
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Annual Book of ASTM Standards, Vol 05.02.
4
profile listed in Table 1 and examined at either 1, 2, or 3°C
Available from Institute of Petroleum, 61 New Cavendish St., London, England
WiM 8AR. intervals. The lowest temperature at which movement of
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D 5950
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TABLE 1 Jacket and Specimen Temperature Cooling Profile
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