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At either 1 °C or 3 °C intervals, a pressurized pulse of compressed gas is imparted onto the surface of the sample. Multiple optical detectors continuously monitor the sample for movement. The lowest temperature at which movement is detected on the sample surface is determined to be the pour point.
The pour point of a liquid ( crude oil or a petroleum fraction) is the temperature below which the liquid becomes plastic and loses its flow characteristics. So pour point is the demarcation point of a fluid’s flowability and an important parameter of liquids at low temperatures.
Nov 13, 2021 · What is Pour Point? The pour point is the lowest temperature at which oil flows in a specified lab test. Specifically, the pour point is 3℃ (5℉) above the temperature at which the oil shows no movement when a lab sample container is held horizontally for 5 seconds.
The pour point of a crude oil, or a petroleum fraction, is the lowest temperature at which the oil will pour or flow when it is cooled, without stirring, under standard cooling conditions. Pour point represents the lowest temperature at which oil is capable of flowing under gravity.
Pour point: The pour point is the lowest temperature at which an oil will flow. This property is crucial for oils that must flow at low temperatures. A commonly used rule of thumb when selecting oils is to ensure that the pour point is at least 10C (20F) lower than the lowest anticipated ambient temperature.
Consequently, low-temperature rheology test methods with various cooling profiles are essential to understanding wax gelation behavior in different applications. The fluid pour point that is related to the wax gelation process is sometimes called wax pour point (Gruse 1967 ).
The temperature at which a fluid ceases to pour. The pour point for oil can be determined under protocols set forth in the ASTM D-97 pour point test in which the pour point is established as that temperature at which oil ceases to flow when the sample is held at 90° to the upright for 5 seconds.
