View Basket

IP 365: Crude petroleum and petroleum products - Determination of density - Oscillating U-tube method

Document options



This International Standard specifies a method for the determination, using an oscillating U-tube density meter, of the density of crude petroleum and related products within the range 600 kg/m3 to 1 100 kg/m3 which can be handled as single-phase liquids at the test temperature and pressure.

This International Standard is applicable to liquids of any vapour pressure as long as suitable precautions are taken to ensure that they remain in single phase with no loss of light ends and subsequent changes in composition and density during both the sample handling and the density determination.

NOTE 1 If the determined density is to be converted to a density at some reference temperature using petroleum measurement tables, the determination should be carried out at a temperature as close as possible to the reference temperature in order to minimize uncertainties due to the use of generalized tables. This method is not intended for use in calibrating online density meters.

(Reapproved 2004)

  • Published: January 1997
  • REF/ISBN: IP365-2935231
  • Status: Current
  • IP: 365
  • BSI: 2000 : 365
  • ISO: 12185
  • EN: 12185
  • Categories: IP Test methods

Standard Methods for the Analysis and Testing of Petroleum Products and British Standard 2000 Parts 

is also available as a 3 volume book set. Order the latest edition here

For subscriptions, please contact the EI Publishing Team at for more information.