IP 479: Determination of wet and dry crude oil densities - Hydrometer method

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  • Method adopted/last revised: 2002
  • Method reapproved: None
  • REF/ISBN: IP479-2934869
  • Status: Current
  • First printed in STM books: January 2002


The presence of water and/or sediment in a crude petroleum measurement system will lead to uncertainty in the value of an observed crude petroleum density. This method specifies techniques for sample handling, sub-sampling, and the determination of density using a glass hydrometer, and the measurement of water and sediment contents of crude petroleum sub-sample.

The data obtained, together with the water and sediment contents of the whole oil enable the dry and wet oil densities to be calculated.

NOTE 1 If the sediment content of the oil is below 0.01 % then for routine calculations this term may be ignored.

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