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Reid vapor pressure (RVP) is a common measure of the volatility of gasoline and other petroleum products. [1] It is defined as the absolute vapor pressure exerted by the vapor of the liquid and any dissolved gases/moisture at 37.8 °C (100 °F) as determined by the test method ASTM-D-323, which was first developed in 1930 [2] and has been ...
2 lut 2013 · The Reid vapor pressure (RVP) is the measure of the absolute pressure exerted by a liquid at 37.8°C (100°F), at a vapor to liquid ratio of 4:1. The true vapor pressure (TVP) is the equilibrium vapor pressure of a mixture when the vapor to liquid ratio=0, e.g., floating roof tanks.
1 lut 2016 · Vapor pressure specifications are typically stated in Reid Vapor Pressure (RVP) or/and True Vapor Pressure (TVP). In addition to the standard procedures for their measurements, there are rigorous and shortcut methods for their estimation and conversion.
9 gru 2020 · The Reid vapor pressure differs from the true vapor pressure of the sample due to some small sample vaporization and the presence of water vapor and air in the confined space.
NOTE 1—Because the external atmospheric pressure is counteracted by the atmospheric pressure initially present in the vapor chamber, the Reid vapor pressure is an absolute pressure at 37.8°C (100°F) in kilopascals (pounds-force per square inch).
26 wrz 2013 · The Reid Vapor Pressure (RVP) is determined according to ASTM Standard D323. Many have expressed confusion related to the pressure units reported for RVP. Since most vapor pressures are reported in absolute pressures, most observers expect the RVP to follow this norm.
The common method for measuring vapor pressure is the Reid vapor pressure (RVP) test. Now an algorithm is available to calculate RVP without performing the actual test.
