ASTM D5191-03
(Test Method)Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
SCOPE
1.1 This test method covers the use of automated vapor pressure instruments to determine the total vapor pressure exerted in vacuum by air-containing, volatile, liquid petroleum products. This test method is suitable for testing samples with boiling points above 0°C (32°F) that exert a vapor pressure between 7 and 130 kPa (1.0 and 18.6 psi) at 37.8°C (100°F) at a vapor-to-liquid ratio of 4:1. Measurements are made on liquid sample sizes in the range from 1 to 10 mL. No account is made for dissolved water in the sample.
Note 1—Samples can also be tested at other vapor-to-liquid ratios, temperatures, and pressures, but the precision and bias statements need not apply.
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 10).
1.2 This test method is suitable for calculation 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 very closely approximates the dry vapor pressure that would be obtained on the same material when tested by Test Method D 4953.
1.3 The values stated in SI units are regarded as standard. The inch-pound units given in parentheses are provided for information only.
1.4 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.
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An American National Standard
Designation: D 5191 – 03
Standard Test Method for
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Vapor Pressure of Petroleum Products (Mini Method)
This standard is issued under the fixed designation D 5191; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 2. Referenced Documents
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1.1 This test method covers the use of automated vapor 2.1 ASTM Standards:
pressure instruments to determine the total vapor pressure D 2892 Test Method for Distillation of Crude Petroleum
exerted in vacuum by air-containing, volatile, liquid petroleum (15-Theoretical Plate Column)
products. This test method is suitable for testing samples with D 4057 Practice for Manual Sampling of Petroleum and
boiling points above 0°C (32°F) that exert a vapor pressure Petroleum Products
between 7 and 130 kPa (1.0 and 18.6 psi) at 37.8°C (100°F) at D 4953 Test Method for Vapor Pressure of Gasoline and
a vapor-to-liquid ratio of 4:1. Measurements are made on liquid Gasoline-Oxygenate Blends (Dry Method)
sample sizes in the range from 1 to 10 mL. No account is made D 5190 Test Method for Vapor Pressure of Petroleum Prod-
for dissolved water in the sample. ucts (Automatic Method)
NOTE 1—Samples can also be tested at other vapor-to-liquid ratios,
3. Terminology
temperatures, and pressures, but the precision and bias statements need not
3.1 Definitions of Terms Specific to This Standard:
apply.
3.1.1 absolute pressure—the pressure of the air-free sample.
1.1.1 Some gasoline-oxygenate blends may show a haze
It is calculated from the total pressure of the sample by
when cooled to 0 to 1°C. If a haze is observed in 8.5, it shall
subtracting out the partial pressure of the dissolved air.
be indicated in the reporting of results. The precision and bias
3.1.2 dry vapor pressure equivalent (DVPE)—a value cal-
statements for hazy samples have not been determined (see
culated by a correlation equation (see 13.2) from the total
Note 10).
pressure.
1.2 This test method is suitable for calculation of the dry
3.1.2.1 Discussion—The DVPE is expected to be equivalent
vapor pressure equivalent (DVPE) of gasoline and gasoline-
to the value obtained on the sample by Test Method D 4953,
oxygenate blends by means of a correlation equation (see
Procedure A.
13.2). The calculated DVPE very closely approximates the dry
3.1.3 total pressure—the observed pressure measured in the
vapor pressure that would be obtained on the same material
experiment that is the sum of the partial pressure of the sample
when tested by Test Method D 4953.
and the partial pressure of the dissolved air.
1.3 The values stated in SI units are regarded as standard.
The inch-pound units given in parentheses are provided for
4. Summary of Test Method
information only.
4.1 A known volume of chilled, air-saturated sample is
1.4 This standard does not purport to address all of the
introduced into an evacuated, thermostatically controlled test
safety concerns, if any, associated with its use. It is the
chamber, the internal volume of which is five times that of the
responsibility of the user of this standard to establish appro-
total test specimen introduced into the chamber. After injection
priate safety and health practices and determine the applica-
into the test chamber, the test specimen is allowed to reach
bility of regulatory limitations prior to use. For specific
thermal equilibrium at the test temperature, 37.8°C (100°F).
warning statements, see 7.2 through 7.7.
The resulting rise in pressure in the chamber is measured using
a pressure transducer sensor and indicator. Only total pressure
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This test method is under the jurisdiction of ASTM Committee D02 on
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Petroleum Products and Lubricants and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
D02.08 on Volatility. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Nov. 1, 2003. Published December 2003. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1991. Last previous edition approved in 2002 as D 5191–02. the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.or
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