ASTM D5853 Standard Test Method for Pour Point of Crude Oils
1. Scope
1.1 This test method covers two procedures for the determination of the pour point temperatures of crude oils down to -36°C. One method provides a measure of the maximum (upper) pour point temperature (Procedure A) and is described in 9.1; the other method provides a measure of the minimum (lower) pour point temperature (Procedure B) and is described in 9.2.
1.2 The use of this test method is limited to use for crude oils. Pour point temperatures of other petroleum products can be determined by Test Method D97.
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 regulatory limitations prior to use. For specific hazard statements, see Section 7.
2. Referenced Documents
2.1 ASTM Standards:
D97 Test Method for Pour Point of Petroleum Products
D130 Test Method for Detection of Copper Corrosion from Petroleum Products by the Copper Strip Tarnish Test
D323 Test Method for Vapor Pressure of Petroleum Products (Reid Method)
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
E 1 Specification for ASTM Thermometers
E 77 Test Method for Inspection and Verification of Thermometers
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 pour point, n - the lowest temperature at which movement of the test specimen is observed under the conditions of the test.
3.1.2 maximum (upper) pour point, n - the pour point obtained after the test specimen has been subjected to a prescribed treatment designed to enhance gelation of wax crystals and solidification of the test specimen.
3.1.3 minimum (lower) pour point, n - the pour point obtained after the test specimen has been subjected to a prescribed treatment designed to delay gelation of wax crystals and solidification of the test specimen.
