IP 441: Determination of the pour point of crude petroleum

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  • Method adopted/last revised: 1999
  • Method reapproved: 2013
  • REF/ISBN: IP441-2935231
  • Status: Current
  • First printed in STM books: January 1999


This standard specifies two procedures for the determination of the pour point of crude petroleum down to a temperature of -36 °C. One procedure (Procedure A) provides a measure of the maximum (upper) pour point, whilst the other procedure (Procedure B) provides a measure of the minimum (lower) pour point. This standard is only applicable to crude petroleum; the pour point of petroleum products should be measured by IP 15.

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