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Significance and Use
5.1 The pour point of a petroleum product is an index of the lowest temperature of its utility for certain applications. Flow characteristics, such as pour point, can be critical for the correct operation of lubricating systems, fuel systems, and pipeline operations.
5.2 Petroleum blending operations require precise measurement of the pour point.
5.3 Test results from this test method can be determined at either 1 or 3°C intervals.
5.4 This test method yields a pour point in a format similar to Test Method D97 or IP 15, when the 3°C interval results are reported.
5.5 This test method has comparable repeatability and better reproducibility relative to Test Method D97 or IP 15 as measured in the 1998 interlaboratory program (see Section 13).
1.1 This test method covers the determination of the pour point of petroleum products by an automatic instrument that tilts the test jar to detect movement of the surface of the test specimen with an optical device, after being removed from a regulated, stepped-bath cooling jacket.
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 1998 interlaboratory test program only covered the temperature range from −51 to −11°C.
1.3 Test results from this test method can be determined at either 1 or 3°C testing intervals.
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. 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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
Energy Institute StandardIP 15 Test Method for Pour Point of Petroleum Products
ICS Number Code 75.080 (Petroleum products in general)
UNSPSC Code 15101500(Petroleum and distillates)