IP 444: Determination of the cloud point of petroleum products - Automatic stepped cooling method

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  • Method adopted/last revised:
  • Method reapproved: 2021
  • Status: Current
  • First printed in STM books: 2009

This standard specifies a procedure for the determination of the cloud point of petroleum products and biodiesel fuels that are transparent in layers 40 mm in thickness. It employs a microprocessor-controlled automatic instrument with an optical detection device to record the appearance of the cloud point. The test method is applicable to products with cloud points in the range of 60 °C to +49 °C. The test method produces results to the nearest 0,1 °C, which when rounded to the nearest lower integer, show no significant relative bias to the results obtained by the manual procedure IP 219/ASTM D2500, but with improved precision.

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