ASTM D5950-02(2007)
(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)
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, like pour point, can be critical for the correct operation of lubricating oil systems, fuel systems, and pipeline operations.
Petroleum blending operations require precise measurement of the pour point.
This test method can determine the pour point of the test specimen with a resolution of 1.0°C.
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/IP15 when the 3°C interval results are reported.
Note 3—Since some users may wish to report their results in a format similar to Test Method D 97 (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 D 97, see 13.3.
This test method has better repeatability and reproducibility relative to Test Method D 97/IP15 as measured in the 1998 interlaboratory test program. (See Section 13.)
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 Section 13.)
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 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: D5950 – 02 (Reapproved 2007)
Standard Test Method for
1
Pour Point of Petroleum Products (Automatic Tilt Method)
This standard is issued under the fixed designation D5950; 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 D4057 Practice for Manual Sampling of Petroleum and
Petroleum Products
1.1 This test method covers the determination of pour point
D4177 Practice for Automatic Sampling of Petroleum and
of petroleum products by an automatic instrument that tilts the
Petroleum Products
test jar during cooling and detects movement of the surface of
3
2.2 Energy Institute Standard:
the test specimen with an optical device.
IP15 Test Method for Pour Point of Petroleum Products
1.2 This test method is designed to cover the range of
temperatures from −57 to +51°C; however, the range of
3. Terminology
temperatures included in the 1992 interlaboratory test program
3.1 Definitions:
only covered the temperature range from −39 to +6°C, and the
3.1.1 pour point, n—in petroleum products, the lowest
range of temperatures included in the 1998 interlaboratory test
temperature at which movement of the test specimen is
program was −51 to −11°C. (See Section 13.)
observed under the prescribed conditions of this test method.
1.3 Test results from this test method can be determined at
3.2 Definitions of Terms Specific to This Standard:
1 or 3°C intervals.
3.2.1 no-flow point, n—in petroleum products, the tempera-
1.4 This test method is not intended for use with crude oils.
ture of the test specimen at which a wax crystal structure or
NOTE 1—The applicability of this test method on residual fuel samples
viscosity increase, or both, impedes movement of the surface
has not been verified. For further information on applicability, refer to
of the test specimen under the conditions of the test.
13.4.
3.2.1.1 Discussion—The no-flow point occurs when, upon
1.5 The values stated in SI units are to be regarded as
cooling,theformationofwaxcrystalstructuresortheviscosity
standard. No other units of measurement are included in this
increase,orboth,hasprogressedtothepointwheretheapplied
standard.
observation device no longer detects movement under the
1.6 This standard does not purport to address all of the
conditions of the test. The preceding observation temperature,
safety concerns, if any, associated with its use. It is the
at which flow of the test specimen is last observed, is the pour
responsibility of the user of this standard to establish appro-
point.
priate safety and health practices and determine the applica-
3.2.2 tilting—technique of movement where the test jar in a
bility of regulatory limitations prior to use.
vertical position is moved towards a horizontal position to
induce specimen movement.
2. Referenced Documents
3.2.2.1 Discussion—When the test jar is tilted and held in a
2
2.1 ASTM Standards:
horizontal position for 5 s without detection of specimen
D97 Test Method for Pour Point of Petroleum Products
movement, this is the no-flow point and the test is complete.
4. Summary of Test Method
1
This test method is under the jurisdiction of ASTM Committee D02 on 4.1 After preliminary heating, the test specimen is inserted
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
into the automatic pour point apparatus. After starting the
D02.07 on Flow Properties.
program, the specimen is cooled according to the cooling
Current edition approved Nov. 1, 2007. Published January 2008. Originally
profile listed in Table 1 and examined at either 1 or 3°C
approved in 1996. Last previous edition approved in 2002 as D5950–02. DOI:
10.1520/D5950-02R07.
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
3
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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D5950 – 02 (2007)
TABLE 1 Jacket and Specimen Temperature Cooling Profile
Specimen Temperature, °C Jacket Temperature, °C
+27 >=ST >+9 0 6 0.5
+9 >=ST >−6 −18 6 0.5
−6 >=ST >−24 −33 6 0.5
−24 >=ST >−42 −51 6 0.5
−42 >=ST >−58 −69 6 0.5
FIG. 1 Optical Detection System
6. Ap
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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.
An American National Standard
Designation:D5950–96 Designation:D5950–02 (Reapproved 2007)
Standard Test Method for
1
Pour Point of Petroleum Products (Automatic Tilt Method)
This standard is issued under the fixed designation D5950; 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 (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 D97/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 toTest Method D97/IP15.When specification
requires Test Method D97/IP15, do not substitute this test method.
This test method covers an alternative procedure for the determination of pour point of petroleum
products using an automatic apparatus.
1. 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.
1.2This test method includes the range of temperatures from −57 to +51°C.
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 Section 13.)
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.
NOTE1—Therangeoftemperatureswhichwasincludedinthe(1992)interlaboratorytestprogramonlycoveredthetemperaturerangefrom−39to+6°C
( 1—The applicability of this test method on residual fuel samples has not been verified. For further information on applicability, refer to 13.4).
1.3Test results from this test method can be determined at 1, 2, and 3°C intervals.
1.4This test method is not intended for use with crude oils.
1.5The values stated in SI units are regarded as standard. .
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D97 Test Method for Pour Point of Petroleum Products
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
3
2.2 IP Standard: Energy Institute Standard:
IP15 Test Method for Pour Point of Petroleum Products
1
This test method is under the jurisdiction ofASTM Committee D-2 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.07.OD
on Wax Related Viscometric Properties of Fuels and Oils.
Current edition approved Apr. 10, 1996. Published June 1996.
1
This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.07 on
Flow Properties.
Current edition approved Nov. 1, 2007. Published January 2008. Originally approved in 1996. Last previous edition approved in 2002 as D5950–02.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 05.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Annual Book of ASTM Standards, Vol 05.02.
3
Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR, 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 ----------------------
D5950–02 (2007)
3. Terminology
3.1 Definitions:
3.1.1 pour point, n—in petroleum products, the lowest temperature at which movement of the test specimen is observed under
the prescribed conditions of this test method.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 no-flow point, n— in petroleum products,thetemper
...
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