Astm Normas

An American National Standard

Designation: D 97 – 05

Designation: 15/95

Standard Test Method for

Pour Point of Petroleum Products1
This standard is issued under the fixed designation D 97; 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 lastreapproval. A superscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.

1. Scope*
1.1 This test method is intended for use on any petroleum
product.2 A procedure suitable for black specimens, cylinder
stock, and nondistillate fuel oil is described in 8.8. A procedure
fortesting the fluidity of a residual fuel oil at a specified
temperature is described in Appendix X1.
1.2 Several ASTM test methods offering alternative procedures for determining pour points using automatic apparatus
are available. None of them share the same designation number
as Test Method D 97. When an automatic instrument is used,
the ASTM test method designation number specific to thetechnique shall be reported with the results. A procedure for
testing the pour point of crude oils is described in Test Method
D 5853.
1.3 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 regulatorylimitations prior to use.

D 396 Specification for Fuel Oils
D 1659 Test Method for Maximum Fluidity Temperature of
Residual Fuel Oil4
D 2500 Test Method for Cloud Point of Petroleum Products
D 3245 Test Method for Pumpability of Industrial Fuel Oils
D 5853 Test Method for Pour Point of Crude Oils
E 1 Specification for ASTM Liquid-in-Glass Thermometers
2.2 Energy Institute Standards:Specifications for IP Standard Thermometers 5
3. Terminology
3.1 Definitions:
3.1.1 black oil, n—lubricant containing asphaltic materials.
Black oils are used in heavy-duty equipment applications, such
as mining and quarrying, where extra adhesiveness is desired.
3.1.2 cylinder stock, n—lubricant for independently lubricated engine cylinders, such as those of steam engines and air
compressors. Cylinderstock are also used for lubrication of
valves and other elements in the cylinder area.
3.1.3 pour point, n—in petroleum products, the lowest
temperature at which movement of the test specimen is
observed under prescribed conditions of test.
3.1.4 residual fuel, n—a liquid fuel containing bottoms
remaining from crude distillation or thermal cracking; sometimes referred to as heavy fuel oil.3.1.4.1 Discussion—Residual fuels comprise Grades 4, 5,
and 6 fuel oils, as defined in Specification D 396.

2. Referenced Documents
2.1 ASTM Standards: 3
D 117 Guide for Sampling, Test Methods, and Specifications for Electrical Insulating Oils of Petroleum Origin
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the directresponsibility of Subcommittee
D02.07 on Flow Properties.
Current edition approved June 1, 2005. Published July 2005. Originally approved
in 1927, replacing D 47. Last previous edition approved in 2004 as D 97–04.
In the IP, this test method is under the jurisdiction of the Standardization
Committee. This test method was adopted as a joint ASTM-IP Standard in 1965.
2
Statements defining this test andits significance when applied to electrical
insulating oils of mineral origin will be found in Guide D 117.
3
Reagent Chemicals, American Chemical Society Specifications, American
Chemical Society, Washington, DC. For suggestions on the testing of reagents not
listed by the American Chemical Society, see Annual Standards for Laboratory
Chemicals, BDH Ltd., Poole, Dorset, U.K., and the...