ASTM-D5482 2007

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D5482-07 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method—Atmospheric)

Published By	Publication Date	Number of Pages
ASTM	2007	5

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Description

ASTM D5482-07

Historical Standard: Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method—Atmospheric)

ASTM D5482

Scope

1.1 This test method covers a procedure for the determination of total vapor pressure of petroleum products using automatic vapor pressure instruments. The test method is suitable for testing samples with boiling points above 0°C (32°F) that exert a vapor pressure between 7 and 110 kPa (1.0 and 16 psi) at 37.8°C (100°F) at a vapor-to-liquid ratio of 4:1. The test method is applicable to gasolines containing oxygenates. No account is made of dissolved water in the sample.

Note 1—Because the external atmospheric pressure does not influence the resultant vapor pressure, this vapor pressure is an absolute pressure at 37.8°C (100°F) in kPa (psi). This vapor pressure differs from the true vapor pressure of the sample due to some small vaporization of the sample and dissolved air into the air of the confined space.

1.1.1 Some gasoline-oxygenate blends may show a haze when cooled to 0 to 1°C. If a haze is observed in 8.5, it shall be indicated in the reporting of results. The precision and bias statements for hazy samples have not been determined (see Note 6).

1.2 This test method is a modification of Test Method D 5191 (Mini Method) in which the test chamber is at atmospheric pressure prior to sample injection.

1.3 This test method covers the use of automated vapor pressure instruments that perform measurements on liquid sample sizes in the range from 1 to 10 mL.

1.4 This test method is suitable for the determination of the dry vapor pressure equivalent (DVPE) of gasoline and gasoline-oxygenate blends by means of a correlation equation (see 13.2). The calculated DVPE is considered equivalent to the result obtained on the same material when tested by Test Method D 4953.

1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.6 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 through 7.7.)

Keywords

dry vapor pressure equivalent; gasoline; hydrocarbon-oxygenate blends; mini method-atmospheric; petroleum products; vapor pressure; Dry vapor pressure; Gasoline; Hydrocarbon-oxygenate blends; Instrumental measurement–petroleum products; Mini method; Petroleum products; Petroleum samples; Total vapor pressure; Vapor pressure (VPx)–petroleum products

ICS Code

ICS Number Code 75.080 (Petroleum products in general)

DOI: 10.1520/D5482-07

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 Preparation of Apparatus Calibration
4	Quality Control Checks Procedure Calculation Report Precision and Bias
5	Keywords

Additional information

Standard Title	D5482-07 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method—Atmospheric)
Published Code	ASTM
Publication Date	2007
Pages Count	5