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IP 409: Liquid petroleum products — Vapour pressure — Part 2: Determination of absolute vapour pressure (AVP) between 40 °C and 100 °C
- Method adopted/last revised: 2008
- Method reapproved: 2015
- REF/ISBN: IP409-7250659
- Status: Current
- First printed in STM books: May 2019
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Scope
This European Standard specifies a method for the determination of absolute vapour pressure of liquid petroleum products at elevated temperatures.
The conditions used in the test described in this standard are a vapour to liquid ratio of 3:2 and an initial injection temperature of 37,8 °C or 30,0 °C. The method described is suitable for testing airsaturated samples that exert an air-saturated vapour pressure of between 9 kPa and 500 kPa at temperatures between 40 °C and 100 °C.
This European Standard is applicable to fuels containing oxygenated compounds up to the limits stated in the relevant EC Directive 85/536/EEC [3].
NOTE 1 If a sample injection is into a test chamber which is raised to 37,8 °C and the vapour to liquid ratio is 4:1, the initial measurement corresponds with the measurement in Part 1 of this standard.
NOTE 2 For the purposes of this European Standard, the term % (V/V) is used to represent the volume fraction.
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