ASTM D5949-96

Standard Test Method for Pour Point of Petroleum Products (Automatic Pressure Pulsing Method)

This test method covers the determination of pour point of petroleum products by an automatic instrument that applies a controlled burst of nitrogen gas onto the specimen surface while the specimen is being cooled and detects movement of the surface of the test specimen with an optical device. 1.2 This test method includes the range of temperatures from -57 to +51 degrees C. Note 1- The range of temperatures which was included in the 1992 interlaboratory test program only covered the temperature range of -39 to +6 degrees C (see 13.4). 1.3 Test results from this test method can also be determined at 1 and 2 degrees C testing intervals; however, precision data on these testing intervals are not available. 1.4 This test method is not intended for use with crude oils. 1.5 the values stated in SI units are to be regarded as 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.