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What is Reid Vapor Pressure?

Updated: 8/11/2023
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15y ago

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Under the ASTM Method D 323 (Reid vapour pressure), it is the absolute vapour pressure exerted by a liquid at 100°F. The higher this value, the more volatile the sample and the more readily it will evaporate. Unlike distillation data, vapour pressure provides a single value that reflects the combined effect of the individual vapour pressure of the different petroleum fractions in accordance with their mole ratios. It is thus possible for two wholly different products to exhibit the same vapour pressure at the same temperature - provided the cumulative pressures exerted by the fractions are the same. A narrow-cut distillate, for example, may exhibit the same vapour pressure as that of a dumbbell blend, where the effect of heavy fractions is counterbalanced by that of the lighter ones. In conjunction with other volatility data. Reid vapour pressure plays a role in the prediction of gasoline performance.

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15y ago
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12y ago

It is absolute vapor pressure exerted by a liquid at 100 °F. It is a measure of volatility. It is measured by ASTM-D-323 test method.

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10y ago

Reid is simply the name of the man who designed the test apparatus for measuring vapor pressure.

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Q: What is Reid Vapor Pressure?
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What is the Reid vapour pressure of gasoline?

Reid vapor pressure (RVP) of gasoline is the vapor pressure at 100°F.


What is the reid vapor pressure of LPG?

100 + psi


What does the Reid vapor pressure test measure?

The volatility of gasoline.


What are factors affecting the reid vapor pressure of an oil?

The amount of light components in the oil affect the reid vapor vapor pressure. In petroleum products such as gasoline, the amount of butane in the gasoline blend has a strong affect on the Reid Vapor Pressure. To reduce RVP more stripping steam can be added to the product strippers. The fractionation in the debutanizer might also need to be adjusted to affect the RVP.


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With respect to fuel volatility What is DVPE?

DVPE is RVP (Reid Vapor Pressure)


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its just under 0.5 pounds.


How do you convert Reid Vapor Pressure to True Vapor Pressure and vice versa?

http://www.epa.gov/ttn/chief/ap42/ch07/final/c07s01.pdf page 56


Reid vapor pressure of water?

Depends on temperature. For ASTM D323 the RVP of water is ~49.5 mmHg (torr) gauge or ~809 mmHg absolute (assuming standard pressure). FYI - ASTM D323 is measured at 100F.


What does the vapor pressure of water at 10 C compare with its vapor pressure at 50 C?

At higher temperature the vapor pressure is higher.


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Is refrigerant leaving a compressor in a cars air conditioning system high pressure vapor high pressure liquid or low pressure vapor?

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