IP 467: Determination of the high temperature stability of middle distillate fuels

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  • Method adopted/last revised: 2017
  • Method reapproved: 2009
  • REF/ISBN: IP467-2938621
  • Status: Current
  • First printed in STM books: April 2018


This standard specifies a procedure for the assessment of the relative stability of middle distillate fuels under high temperature ageing conditions with limited air exposure. The test method applies to kerosines and gas oils, excluding aviation kerosine, having a flash point determined using a closed cup tester exceeding 38 °C. It is not applicable to fuels containing residues from petroleum processing.

This test method provides an indication of the thermal oxidative stability of middle distillate fuels when heated to high temperatures that may occur in engine or burner systems, and can be used for investigations of operational problems related to fuel thermal stability. It has not been substantially correlated to engine or burner operation. For storage stability, longer term storage tests, such as IP 378, or intermediate temperature tests, such as IP 388, are likely to give better predictions. No quantitative relationship exists between the reflectance ratings obtained as a result of this procedure and the mass of insolubles formed during the ageing process.

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