ASTM D5482-99
(Test Method)Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method-Atmospheric)
Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method-Atmospheric)
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 0oC (32oF) that exert a vapor pressure between 7 and 110 kPa (1.0 and 16 psi) at 37.8oC (100oF) 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 37.8oC (100oF) 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 my show a haze when cooled to 0 to 1 oC. 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 D5191 (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 ). The calculated DVPE is considered equivalent to the result obtained on the same material when tested by Test Method D4953.
1.5 The values stated in acceptable SI units are regarded as standard. The values given in parentheses are provided 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 hazard statements, see 7.2 through 7.7.)
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Designation: D 5482 – 99 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Vapor Pressure of Petroleum Products (Mini Method—
1
Atmospheric)
This standard is issued under the fixed designation D 5482; 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.
1. Scope * responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
1.1 This test method covers a procedure for the determina-
bility of regulatory limitations prior to use. (For specific hazard
tion of total vapor pressure of petroleum products using
statements, see Note 3.)
automatic vapor pressure instruments. The test method is
suitable for testing samples with boiling points above 0°C
2. Referenced Documents
(32°F) that exert a vapor pressure between 7 and 110 kPa (1.0
2.1 ASTM Standards:
and 16 psi) at 37.8°C (100°F) at a vapor-to-liquid ratio of 4:1.
D 4057 Practice for Manual Sampling of Petroleum and
The test method is applicable to gasolines containing oxygen-
2
Petroleum Products
ates. No account is made of dissolved water in the sample.
D 4953 Test Method for Vapor Pressure of Gasoline and
NOTE 1—Because the external atmospheric pressure does not influence 3
Gasoline-Oxygenate Blends (Dry Method)
the resultant vapor pressure, this vapor pressure is an absolute pressure at
D 5190 Test Method for Vapor Pressure of Petroleum Prod-
37.8°C (100°F) in kPa (psi). This vapor pressure differs from the true
3
ucts (Automatic Method)
vapor pressure of the sample due to some small vaporization of the sample
D 5191 Test Method for Vapor Pressure of Petroleum Prod-
and dissolved air into the air of the confined space.
3
ucts (Mini Method)
1.1.1 Some gasoline-oxygenate blends my show a haze
when cooled to 0 to 1 °C. If a haze is observed in 8.5, it shall
3. Terminology
be indicated in the reporting of results. The precision and bias
3.1 Definitions of Terms Specific to This Standard:
statements for hazy samples have not been determined (see
3.1.1 dry vapor pressure equivalent (DVPE)—a value cal-
Note 7).
culated by a correlation equation (see 13.2) from the total
1.2 This test method is a modification of Test Method
pressure.
D 5191 (Mini Method) in which the test chamber is at
3.1.1.1 Discussion—The DVPE is expected to be equivalent
atmospheric pressure prior to sample injection.
to the value obtained on the sample by Test Method D 4953.
1.3 This test method covers the use of automated vapor
3.1.2 total pressure—the observed pressure measured in the
pressure instruments that perform measurements on liquid
experiment that is the resultant pressure increase from the
sample sizes in the range from 1 to 10 mL.
initial ambient atmospheric pressure.
1.4 This test method is suitable for the determination of the
dry vapor pressure equivalent (DVPE) of gasoline and
4. Summary of Test Method
gasoline-oxygenate blends by means of a correlation equation
4.1 A known volume of chilled, air-saturated sample is
(see 13.2). The calculated DVPE is considered equivalent to
introduced into a thermostatically controlled test chamber, the
the result obtained on the same material when tested by Test
internal volume of which is five times that of the total test
Method D 4953.
specimen introduced into the chamber. The test chamber is at
1.5 The values stated in acceptable SI units are regarded as
atmospheric pressure prior to introduction of the sample. After
standard. The values given in parentheses are provided for
introduction of the sample into the test chamber, the test
information only.
specimen is allowed to reach thermal equilibrium at the test
1.6 This standard does not purport to address all of the
temperature, 37.8°C (100°F). The resulting rise in pressure in
safety concerns, if any, associated with its use. It is the
the chamber is measured using a pressure transducer sensor
and indicator.
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4.2 The measured total vapor pressure is converted to a
This test method is under the jurisdiction of ASTM Committee D-2 on
Petroleum products and Lubricants and is the direct responsibility of Subcommittee
D02.08.OD on RVP and V/L Ratio.
2
Current edition approved Dec. 10, 1998 and Jan. 10, 1999. Published March Annual Book of ASTM Standards, Vol 05.02.
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1999. Originally published as D 5482 – 93. Last previous edition D 5482 – 96. Annual Book of ASTM Standards, Vol 05.03.
*A Summary of Changes section appears at the end of this standard.
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