ISO 8973 pdf download – Liquefied petroleum gases-Calculation method for density and vapour pressure

ISO 8973 pdf download – Liquefied petroleum gases-Calculation method for density and vapour pressure.
At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of lEG and ISO maintain registers of currently valid International Standards.
ISO 6578:1991, Refrigerated hydrocarbon liquids — Static measurement — Calculation procedure. 1S07941:1988, Commercial propane and butane — Analysis by gas chromatography.
3 DefinItions
For the purpose of this International Standard the following definitions apply.
3.1 liquefied petroleum gas (LPG): Hydrocarbon gas that can be stored and/or handled in the liquid phase under moderate conditions of pressure and at ambient temperature. It consists essentially of C3 and C4 alkanes or alkenes, or a mixture of these, contains generally less than 5 % by liquid volume of material of higher carbon number, and has a gauge vapour pressure not exceeding approximately 1 600 kPa at 40°C.
3.2 density factor: Density, expressed in kilograms per cubic metre, of a component in the liquid phase under its own vapour pressure at a temperature of 15°C.
3.3 vapour pressure: Vapour pressure, expressed in kilopascals on an absolute basis, i.e. the gauge pressure plus local ambient pressure.
3,4 vapour pressure factor: Absolute vapour pressure, expressed in kilopascals, of a component of the liquid at temperature of 37,8 °C, 40°C, 50°C or 70°C.