Reid vapor pressure
= Reid vapor pressure
{wiki=Reid_vapor_pressure}
Reid Vapor Pressure (RVP) is a measure of the volatility of a liquid at a given temperature, typically expressed in pounds per square inch (psi) or sometimes in kilopascals (kPa). It specifically refers to the pressure exerted by a vapor in equilibrium with its liquid at a specified temperature, usually 100 degrees Fahrenheit (approximately 38 degrees Celsius).