ASTM-D6378 2010

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D6378-10 Standard Test Method for Determination of Vapor Pressure (VPX) of Petroleum Products, Hydrocarbons, and Hydrocarbon-Oxygenate Mixtures (Triple Expansion Method)

Published By	Publication Date	Number of Pages
ASTM	2010	14

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Description

ASTM D6378-10

Historical Standard: Standard Test Method for Determination of Vapor Pressure (VPX) of Petroleum Products, Hydrocarbons, and Hydrocarbon-Oxygenate Mixtures (Triple Expansion Method)

ASTM D6378

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 and 150 kPa (1.0 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 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 and 110 kPa (0 and 15.5 psi) at a vapor-to-liquid ratio of 4:1, in the temperature range from 25 to 100°C (77 to 212°F).

1.3 The vapor pressure (VP_X) determined by this test method at a vapor-liquid ratio of 4:1 (X = 4) of gasoline and gasoline-oxygenate blends at 37.8°C can be correlated to the dry vapor pressure equivalent (DVPE) value determined by Test Method D5191 (see 16.3). This condition does not apply when the sample is aviation turbine fuel.

1.4 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.

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; Automated procedures–petroleum products analysis; Dry vapor pressure; Hydrocarbon-oxygenate blends; Mini method; Petroleum products; Triple expansion method; Vapor pressure (VPx)–petroleum products; Variable volume method

ICS Code

ICS Number Code 75.080 (Petroleum products in general)

DOI: 10.1520/D6378-10

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Test Method Significance and Use Apparatus Reagents and Materials
3	Sampling and Sample Introduction TABLE 1
4	FIG. 1
5	FIG. 2
6	Preparation of Apparatus Calibration Verification of Instrument Performance
7	Quality Control Checks Procedure Calculation Report Precision and Bias
8	TABLE 2 TABLE 3 TABLE 4 TABLE 5
9	TABLE 6 TABLE 7 TABLE 8
10	Keywords X1. DERIVATION OF EQUATIONS USED TO CALCULATE VPX X1.1 Theory
11	X2. AIR CORRECTION AT A TEMPERATURE OTHER THAN THE TEST TEMPERATURE X2.1 X3. INFORMATION RELATING TO THE 2003 INTERLABORATORY STUDY (ILS) X3.1 ILS Objectives Pertaining to Test Method D6378 X3.2 Samples X3.3 Reference Fuels X3.4 Test Method D6378 Instrument Types and Data Sets Evaluated
12	X4. GUIDELINES AND SUGGESTIONS FOR PREPARING, STORING, AND ISOLATING QC SAMPLES FOR USE IN THIS TEST X4.1 X4.2 X5. INFORMATION ON CROSS-METHOD REPRODUCIBILITY VALUES BETWEEN PREDICTED DVPE1-L container VALUES DETERMINED BY X5.1 Cross-method Reproducibility (RXY)
13	FIG. X5.1
14	FIG. X5.2

Additional information

Standard Title	D6378-10 Standard Test Method for Determination of Vapor Pressure (VP<inf>X</inf>) of Petroleum Products, Hydrocarbons, and Hydrocarbon-Oxygenate Mixtures (Triple Expansion Method)
Published Code	ASTM
Publication Date	2010
Pages Count	14