5.1 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.
5.2 Petroleum blending operations require precise measurement of the pour point.
5.3 This test method can determine the pour point of the test specimen with a resolution of 1.0°C.
5.4 Test results from this test method can be determined at either 1 or 3°C intervals.
5.5 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 3—
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. 5.6 This test method has better repeatability and reproducibility relative to Test Method D97/IP15 as measured in the 1998 interlaboratory test program. (See Section 13.)
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 −66 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.......
ASTM D5950-12a history
- 2020 ASTM D5950-14(2020) Standard Test Method for Pour Point of Petroleum Products (Automatic Tilt Method)
- 2014 ASTM D5950-14 Standard Test Method for Pour Point of Petroleum Products 40;Automatic Tilt Method41;
- 2012 ASTM D5950-12a Standard Test Method for Pour Point of Petroleum Products (Automatic Tilt Method)
- 2012 ASTM D5950-12 Standard Test Method for Pour Point of Petroleum Products (Automatic Tilt Method)
- 2002 ASTM D5950-02(2007) Standard Test Method for Pour Point of Petroleum Products (Automatic Tilt Method)
- 2002 ASTM D5950-02 Standard Test Method for Pour Point of Petroleum Products (Automatic Tilt Method)
- 1996 ASTM D5950-96 Standard Test Method for Pour Point of Petroleum Products (Automatic Tilt Method)