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ASTM D5985-02(2020)

(Test Method)

Standard Test Method for Pour Point of Petroleum Products (Rotational Method)

Standard Test Method for Pour Point of Petroleum Products (Rotational Method)

SIGNIFICANCE AND USE
5.1 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.  
5.2 Petroleum blending operations require precise measurement of the pour point.  
5.3 This test method can determine the temperature of the test specimen with a resolution of 0.1 °C at which either crystals have formed or viscosity increases sufficiently to impede movement of the petroleum product.  
5.4 This test method yields a pour point in a format similar to Test Method D97/IP15 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 D97 (in 3 °C intervals) the precisions were derived for the temperatures rounded to the 3 °C intervals. For statements on bias relative to Test Method D97, see 13.3.  
5.5 This test method has better repeatability and comparable reproducibility relative to Test Method D97 as measured in the 1992 interlaboratory program. (See Section 13.)
SCOPE
1.1 This test method covers the determination of pour point of petroleum products by an automatic instrument that continuously rotates the test specimen against a suspended detection device during cooling of the test specimen.  
1.2 This test method is designed to cover the range of temperatures from −57 °C to +51 °C; however, the range of temperatures included in the 1992 interlaboratory program only covered the temperature range of −39 °C to +6 °C (see 13.4).  
1.3 This test method determines the no-flow point of petroleum products by detection of the crystal structure or viscosity increase, or both, in the sample that is sufficient to impede flow of the specimen.  
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 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 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

Status
Published
Publication Date
30-Apr-2020
ICS
75.080 - Petroleum products in general
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.07 - Flow Properties
Current Stage
Ref Project

Relations

Referred By
ASTM D8240-22e1 - Standard Specification for Less-Flammable Synthetic Ester Liquids Used in Electrical Apparatus
Effective Date
01-May-2020
Referred By
ASTM D2880-23 - Standard Specification for Gas Turbine Fuel Oils
Effective Date
01-May-2020
Referred By
ASTM D396-21 - Standard Specification for Fuel Oils
Effective Date
01-May-2020
Referred By
ASTM D86-23 - Standard Test Method for Distillation of Petroleum Products and Liquid Fuels at Atmospheric Pressure
Effective Date
01-May-2020
Referred By
ASTM D6074-15(2022) - Standard Guide for Characterizing Hydrocarbon Lubricant Base Oils
Effective Date
01-May-2020

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ASTM D5985-02(2020) - Standard Test Method for Pour Point of Petroleum Products (Rotational Method)ASTM D5985-02(2020) - Standard Test Method for Pour Point of Petroleum Products (Rotational Method)
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ASTM D5985-02(2020) - Standard Test Method for Pour Point of Petroleum Products (Rotational Method)
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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: D5985 − 02 (Reapproved 2020)
Standard Test Method for
1
Pour Point of Petroleum Products (Rotational Method)
This standard is issued under the fixed designation D5985; 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.
INTRODUCTION
This test method covers an alternative procedure for the determination of pour point of petroleum
products using an automatic apparatus.
1. Scope mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This test method covers the determination of pour point
of petroleum products by an automatic instrument that con-
2. Referenced Documents
tinuously rotates the test specimen against a suspended detec-
2
tion device during cooling of the test specimen.
2.1 ASTM Standards:
D97Test Method for Pour Point of Petroleum Products
1.2 This test method is designed to cover the range of
D4057Practice for Manual Sampling of Petroleum and
temperatures from −57°C to +51°C; however, the range of
Petroleum Products
temperatures included in the 1992 interlaboratory program
D4177Practice for Automatic Sampling of Petroleum and
only covered the temperature range of −39°C to +6°C (see
Petroleum Products
13.4).
3
2.2 Energy Institute Standards:
1.3 This test method determines the no-flow point of petro-
IP 15Test Method for Pour Point of Petroleum Products
leum products by detection of the crystal structure or viscosity
increase,orboth,inthesamplethatissufficienttoimpedeflow
3. Terminology
of the specimen.
3.1 Definitions:
1.4 This test method is not intended for use with crude oils.
3.1.1 pour point, n—in petroleum products, the lowest
NOTE 1—The applicability of this test method on residual fuel samples
temperature at which movement of the test specimen is
has not been verified. For further information on applicability, refer to
observed under prescribed conditions of test.
13.4.
3.2 Definitions of Terms Specific to This Standard:
1.5 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this 3.2.1 no-flow point, n—in petroleum products, the tempera-
ture of the test specimen at which a wax crystal structure or
standard.
viscosity increase, or both, impedes movement of the surface
1.6 This standard does not purport to address all of the
of the test specimen under the conditions of the test.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.2.2 Discussion—The no-flow point occurs when, upon
priate safety, health, and environmental practices and deter- cooling, the formation of wax crystal structures or viscosity
mine the applicability of regulatory limitations prior to use. increase, or both, have progressed to the point where the
1.7 This international standard was developed in accor- applied observation device no longer detects movement under
dance with internationally recognized principles on standard- the conditions of the test. The preceding observation
ization established in the Decision on Principles for the temperature, at which flow of the test specimen is last
Development of International Standards, Guides and Recom- observed, is the pour point.
1 2
This test method is under the jurisdiction of ASTM Committee D02 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Petroleum Products, Liquid Fuels, and Lubricantsand is the direct responsibility of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Subcommittee D02.07 on Flow Properties. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 1, 2020. Published June 2020. Originally the ASTM website.
3
approved in 1996. Last previous edition approved in 2014 as D5985–02 (2014). Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
DOI: 10.1520/D5985-02R20. U.K., http://www.energyinst.org.uk.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5985 − 02 (2020)
3.2.3 pour point at 3 °C testing intervals, n—in petroleum 6. Apparatus
products, the temperature calculated by rounding the no-flow 4
6.1 Automatic Apparatus —The automatic pour point appa-
point of the test specimen to the next higher integer which is a
ratus described in the Annex A1 consists of a microprocessor
multi
...

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1.1 This test method covers the atmospheric distillation of petroleum products and liquid fuels using a laboratory batch distillation unit to determine quantitatively the boiling range characteristics of such products as light and middle distillates, automotive spark-ignition engine fuels with or without oxygenates (see Note 1), aviation gasolines, aviation turbine fuels, diesel fuels, biodiesel blends up to 30 % volume, marine fuels, special petroleum spirits, naphthas, white spirits, kerosines, and Grades 1 and 2 burner fuels.
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