What Is Rvp In Gasoline

Because the fuel rule was retained as a contingency measure it remains on the boutique fuel list.

What is rvp in gasoline.

Winter blend fuel has a higher rvp because the fuel must be able to evaporate at low temperatures for the engine to operate properly especially when the engine is cold. Federal law prohibits gasoline with a reid vapor pressure rvp greater than 9 0 pounds per square inch to be sold at retail stations from june 1 through september 15. Alabama rvp of 7 0 psi. Reid vapor pressure is the pressure exerted by a liquid to calculate the volatile nature of gasoline.

Rvp is an abbreviation for reid vapor pressure a common measure of and generic term for gasoline volatility. Epa regulates the vapor pressure of gasoline sold at retail stations during the summer ozone season june 1 to september 15 to reduce evaporative emissions from gasoline that contribute to ground level ozone and diminish the effects. Regulators worry about this evaporation because it contributes to ozone formation. Rvp is the vapor pressure of gasoline measured at 100 degrees fahrenheit.

A particular fuel blend s rvp is based on the combined rvp of the ingredients that make up the blend. See 77 fr 23619 april. Rvp is a measure of how easily the fuel evaporates at a given temperature. It is determined by a test known as astm d 323.

The more volatile a gasoline higher rvp the easier it evaporates. Reid vapor pressure rvp is a common measure of the volatility of gasoline and other petroleum products. Fuels with higher rvp evaporate more easily than those with lower rvp. Rvp is not.

Reid vapor pressure is measured in gauge pressure and is stated in psi units.