At about 9☌ above the expected pour point, and for every subsequent 3☌, the test jar is removed from the cooling bath and tilted to check if the crude oil surface is moving. Paraffin wax crystals are formed upon cooling. As per these standards, the Crude oil specimen is cooled inside a cooling bath.
Pure point measure manual#
Manual Method of Pour Point Measurement:ĪSTM D97 (ISO 3016 or IP 15) standard provides the standard test methods for determining the pour point of Crude oil. There are two methods for measuring the pour point of a liquid the Manual method and the Automatic method. Pour point is used to allows process dimensioning and pumping calculations, and in preventive actions and process improvement.Also, the pour point indicates the dissolved wax concentration in the oil. For Lubricating oils, the pour points determine the liquid’s suitability to be used as a lubricant at sub-zero temperatures.The high value of pour point means it can become semi-solid at that temperature which may cause jamming of the machine during operation.Pour points provide the lowest temperature for that fluid at which it can transfer by pouring.Pour point is more significant for Lubricating oils.If the surrounding temperature is less than the pour point, it cannot be transferred through a pipeline.Pour point indicates a liquid’s lower temperature properties.
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