Nov 12, 2024 · The current regulatory text explains that summer gasoline (e.g., gasoline that is sold to consumers from June 1 to September 15) must meet a maximum per-gallon RVP limit of 9.0 psi unless it is required to meet a lower RVP limit.

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 ...

Dec 5, 2016 · EPA provides a 1.0 psi RVP allowance for gasoline containing ethanol at 9 to 10 volume percent. In order to relax the applicable federal RVP standard in an area where the more stringent federal RVP of 7.8 psi is required, an area must be designated as (or redesignated to) an attainment area.

Gasoline designated as summer gasoline or located at any location in the United States during the summer season must meet a maximum RVP per-gallon standard of 9.0 psi unless the gasoline is subject to one of the lower maximum RVP per-gallon standards specified in paragraphs (a) (2) through (5) of this section.

For a pure component the RVP is equivalent to true vapor pressure at 100oF. Table 1 shows the values reported by Precision Scientific and the values given by the current algorithm for five compounds.

Aug 12, 2015 · Depending on the state and month, gasoline RVP may not exceed 9.0 psi or 7.8 psi. EPA provides a 1.0 psi RVP allowance for gasoline containing ethanol at 9 to 10 volume percent. Additional Resources

Dec 1, 2019 · 1.1 This test method covers the determination of the total pressure, exerted in vacuum, by air-containing, volatile petroleum products. The test method is suitable for testing samples with boiling points above 32 oF that exert a vapor pressure between 7 and 130 kPa (1.0 and 19 psi) at 100 oF and a vapor to liquid ratio of 4:1.

Eight midwestern governors petitioned the Environmental Protection Agency (EPA) to remove the federal 1 psi Reid Vapor Pressure (RVP) allowance (commonly referred to as the “1-pound waiver”) in their states.

The Clean Air Act (CAA) requires the U.S. Environmental Protection Agency (EPA) to regulate the Reid vapor pressure (RVP) of gasoline sold at retail during the summer ozone season between June 1 and September 15.

Effective June 1, 2025, these new standards aim to reduce gasoline volatility, thereby decreasing emissions and contributing to cleaner air. Understanding the New RVP Standards. RVP measures gasoline’s propensity to evaporate at specific temperatures, influencing both vehicle performance and environmental impact.