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Standard Test Method for Determination of Vapor Pressure (VPX) of Petroleum Products, Hydrocarbons, and Hydrocarbon-Oxygenate Mixtures (Triple Expansion Method)
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NORM herausgegeben am 1.10.2016
Bezeichnung normen: ASTM D6378-10(2016)
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.10.2016
SKU: NS-668353
Zahl der Seiten: 14
Gewicht ca.: 42 g (0.09 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
aviation turbine fuel, dry vapor pressure, gasoline, gasoline and gasoline-oxygenate blends, hydrocarbon-oxygenate blends, mini method, petroleum products, vapor pressure, variable volume method,, ICS Number Code 75.080 (Petroleum products in general)
Significance and Use | ||||||||||||||||||||||
5.1 Vapor pressure is a very important physical property of volatile liquids for shipping and storage. 5.2 The vapor pressure of gasoline and gasoline-oxygenate blends is regulated by various government agencies. 5.3 Specifications for volatile petroleum products generally include vapor pressure limits to ensure products of suitable volatility performance. 5.4 In this test method, an air saturation procedure prior to the measurement is not required, thus eliminating losses of high volatile compounds during this step. This test method is faster and minimizes potential errors from improper air saturation. This test method permits VP5.5 This test method can be applied in online applications in which an air saturation procedure prior to the measurement cannot be performed. |
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1. Scope | ||||||||||||||||||||||
1.1 This test method covers the use of automated vapor pressure instruments to determine the vapor pressure exerted in vacuum by volatile, liquid petroleum products, hydrocarbons, and hydrocarbon-oxygenate mixtures. This test method is suitable for testing samples with boiling points above 0 °C (32 °F) that exert a vapor pressure between 7 kPa and 150 kPa (1.0 psi and 21 psi) at 37.8 °C (100 °F) at a vapor-to-liquid ratio of 4:1. The liquid sample volume size required for analysis is dependent upon the vapor-to-liquid ratio chosen (see Note 1) and the measuring chamber volume capacity of the instrument (see 6.1.1 and Note 3). Note 1: The test method is suitable for the determination of
the vapor pressure of volatile, liquid petroleum products at
temperatures from 0 °C to 100 °C at vapor to liquid ratios of 4:1
to 1:1 (X = 4 to 1) and pressures up to 500 kPa (70 psi), but the
precision statement (see Section 16) may not be applicable.
1.2 This test method also covers the use of automated vapor pressure instruments to determine the vapor pressure exerted in vacuum by aviation turbine fuels. This test method is suitable for testing aviation turbine fuel samples with boiling points above 0 °C (32 °F) that exert a vapor pressure between 0 kPa and 110 kPa (0 psi and 15.5 psi) at a vapor-to-liquid ratio of 4:1, in the temperature range from 25 °C to 100 °C (77 °F to 212 °F). 1.3 The vapor pressure (VP1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see 7.2 – 7.8. |
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2. Referenced Documents | ||||||||||||||||||||||
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