Standard Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer/Method)

Importancia y uso:

5.1 Accurate determination of the gravity of petroleum and its products is necessary for the conversion of measured volumes to volumes at the standard temperature of 60 °F (15.56 °C).

5.2 This procedure is most suitable for determining the API gravity of low viscosity transparent liquids. This test method can also be used for viscous liquids by allowing sufficient time for the hydrometer to reach temperature equilibrium, and for opaque liquids by employing a suitable meniscus correction. Additionally for both transparent and opaque fluids the readings shall be corrected for the thermal glass expansion effect before correcting to the reference temperature.

5.3 When used in connection with bulk oil measurements, volume correction errors are minimized by observing the hydrometer reading at a temperature as close to reference temperature as feasible.

5.4 Gravity is a factor governing the quality of crude oils. However, the gravity of a petroleum product is an uncertain indication of its quality. Correlated with other properties, gravity can be used to give approximate hydrocarbon composition and heat of combustion.

5.5 Gravity is an important quality indicator for automotive, aviation and marine fuels, where it affects storage, handling and combustion.

Subcomité:

D02.02

Referida por:

F0715-07R23, D1045-19, F0311-08R20, D5002-22, D7670-10R21, E2995-15AR20, D5002-22, D4057-22, D5964-16R21, D8048-24, D4814-24A, D2890-23, D8011-19, D8074-23, D0976-21E01, D2889-95R19, D0115-17R24, D5002-22, D4052-22, D6891-23, D5900-23, D7156-24, D0976-21E01, D8188-23, D4057-22, D4052-22, D4052-22, D6074-15R22, D4814-24A, D7777-24, D0976-21E01, D4057-22, D2501-14R19, D7422-23, D0471-16AR21, D8256-24A, D6201-19A, D5967-21, D0471-16AR21, D4814-24A, D5966-22, D6750-23, D4057-22, D0471-16AR21, D0117-22, D6593-18E01, D7583-16R23, D7468-22

Volúmen:

05.01

Número ICS:

75.080 (Petroleum products in general)

Palabras clave:

API gravity; crude petroleum; digital contact thermometer; hydrometer; thermohydrometer; thermometer;