API MPMS 11.3.3-2011 pdf download.Manual of Petroleum Measurement Standards Chapter 11.3.3 Miscellaneous Hydrocarbon Product Properties— Ethanol Density and Volume Correction Factors.
2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. API MPMS Ch. 11.1–2004, Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, and Lubricating Oils (includes Addendum dated September 2007). API MPMS Ch. 12.1.1–2007, Calculation of Static Petroleum Quantities—Upright Cylindrical Tanks and Marine Vessels. 3 Terms and Definitions For the purposes of this document, the following definitions apply. 3.1 absolute density D The mass of a substance occupying unit volume at a specified temperature at atmospheric pressure or equilibrium vapor pressure. NOTE Density as so defined is sometimes referred to as “true density” or as “density in vacuo” or often just plain “density.” When reporting density, the units of mass and volume used and the temperature of the determination have to be stated (e.g. kilograms per cubic meter or grams per millimeter at t °F or ( t °C). For the oil industry, if the temperature is unstated, standard temperature (60 °F or 15 °C) should be assumed. 3.2 denaturants Materials added to ethanol to make it unsuitable for beverage use under a formula approved by a regulatory agency to prevent the imposition of beverage alcohol tax. 3.3 denatured fuel ethanol Fuel ethanol made unfit for beverage use by the addition of denaturants under formula(s) approved by the applicable regulatory agency to prevent the imposition of beverage alcohol tax.
3.4 ethanol Ethyl alcohol, the chemical C 2 H 5 OH. 3.5 fuel ethanol A grade of undenatured ethanol with other components common to its production (including water) that do not affect the use of the product as a component for automotive spark ignition engine fuels. 3.6 gasoline A volatile mixture of liquid hydrocarbons, generally containing small amounts of additives, suitable for use as a fuel in spark-ignition internal combustion engines. 3.7 gross observed volume GOV The total volume of all liquid and sediment and water, excluding free water, at observed temperature and pressure. 3.8 gross standard volume GSV The total volume of liquid and sediment and water, excluding free water, corrected by the appropriate volume correction factor (VCF) for the observed temperature to a standard reference temperature (generally 60 °F or 15 °C). NOTE If there is no sediment and water, GSV is the same as net standard volume (NSV). 3.9 natural gasoline A natural gas liquid with a vapor pressure intermediate between condensate and liquefied petroleum gas. NOTE This liquid hydrocarbon mixture is recovered at normal pressure and temperature and is much more volatile and unstable than commercial gasoline. 3.10 net standard volume NSV The total volume of liquid, excluding sediment and water and free water, corrected by the appropriate VCF for the observed temperature to a standard reference temperature (generally 60 °F or 15 °C). NOTE If there is no sediment and water, GSV is the same as NSV. 3.11 pure ethanol For the purposes of this standard, ethanol that is ≥ 99.0 % pure shall be considered pure. 3.12 volume correction factor VCF A factor that corrects the volume of a liquid at observed temperature and base pressure to its volume at standard reference temperature (generally 60 °F or 15 °C at 0 psig).
4 Implementation Procedures 4.1 Pure Ethanol For volume or density correction from observed temperature to 60 °F, the implementation procedure given in API MPMS Ch. 11.1-2004 shall be used for pure ethanol. Pure ethanol is considered to be a “special application” (formerly known as Table 6C or Table 54C) with an alpha coefficient of 0.000599/°F or 0.001078/°C (Annex A). NOTE The above mentioned implementation procedure is the standard. However, if occasional table differences of 0.001 % (1 in 100,000 volume units) are acceptable to all parties, commodity group “Refined Products” (formerly known as Table 6B) with an API gravity of 50.47 may be used in lieu of the 6C table (Annex A).