ASTM D5482-07
(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<span class='unicode'>—</span>Atmospheric)
SIGNIFICANCE AND USE
Vapor pressure is an important physical property of volatile liquids.
Vapor pressure is critically important for both automotive and aviation gasolines, affecting starting, warm-up, and tendency to vapor lock with high operating temperatures or high altitudes. Maximum vapor pressure limits for gasoline are legally mandated in some areas as a measure of air pollution control.
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.)
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Designation: D5482 − 07
StandardTest Method for
Vapor Pressure of Petroleum Products (Mini Method—
1
Atmospheric)
This standard is issued under the fixed designation D5482; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method covers a procedure for the determina-
responsibility of the user of this standard to establish appro-
tion of total vapor pressure of petroleum products using
priate safety and health practices and determine the applica-
automatic vapor pressure instruments. The test method is
bility of regulatory limitations prior to use. (For specific
suitable for testing samples with boiling points above 0°C
warning statements, see 7.2 through 7.7.)
(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.
2. Referenced Documents
The test method is applicable to gasolines containing oxygen-
2
ates. No account is made of dissolved water in the sample.
2.1 ASTM Standards:
D4057 Practice for Manual Sampling of Petroleum and
NOTE 1—Because the external atmospheric pressure does not influence
Petroleum Products
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
D4175 Terminology Relating to Petroleum, Petroleum
vaporpressureofthesampleduetosomesmallvaporizationofthesample
Products, and Lubricants
and dissolved air into the air of the confined space.
D4953 Test Method for Vapor Pressure of Gasoline and
1.1.1 Some gasoline-oxygenate blends may show a haze
Gasoline-Oxygenate Blends (Dry Method)
when cooled to 0 to 1°C. If a haze is observed in 8.5, it shall
D5190 Test Method for Vapor Pressure of Petroleum Prod-
be indicated in the reporting of results. The precision and bias
ucts (Automatic Method)
statements for hazy samples have not been determined (see
D5191 Test Method for Vapor Pressure of Petroleum Prod-
Note 6).
ucts (Mini Method)
1.2 This test method is a modification of Test Method
3. Terminology
D5191 (Mini Method) in which the test chamber is at atmo-
spheric pressure prior to sample injection.
3.1 Definitions:
1.3 This test method covers the use of automated vapor 3.1.1 dry vapor pressure equivalent (DVPE), n—value cal-
pressure instruments that perform measurements on liquid culated by a defined correlation equation, that is expected to be
sample sizes in the range from 1 to 10 mL. comparable to the vapor pressure value obtained by Test
Method D4953, Procedure A.
1.4 This test method is suitable for the determination of the
dry vapor pressure equivalent (DVPE) of gasoline and
3.1.2 gasoline-oxygenate blend, n—spark-ignition engine
gasoline-oxygenate blends by means of a correlation equation fuel consisting primarily of gasoline with one or more oxygen-
(see 13.2). The calculated DVPE is considered equivalent to
ates.
the result obtained on the same material when tested by Test
3.1.3 oxygenate, n—oxygen-containing ashless organic
Method D4953.
compound, such as an alcohol or ether, which may be used as
1.5 The values stated in SI units are to be regarded as the
a fuel or fuel supplement. D4175
standard. The values given in parentheses are for information
3.1.4 platinum resistance thermometer, n— temperature
only.
measuring device with platinum wire, whose electrical resis-
tance changes in relation to temperature.
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
2
D02.08 on Volatility. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2007. Published January 2008. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1993. Last previous edition approved in 2001 as D5482–01. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D5482-07. 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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D5482 − 07
3.1.5 total vapor pressure, n—observed pressure measured 6.1.3 A thermostatically controlled heater shall be used to
in the experiment, that is the sum of the partial pressure of the maintain the test chamber at 37.8 6 0.1°C (100 6 0.2°F) for
sample and
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:D5482–01 Designation:D5482–07
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*
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 Somegasoline-oxygenateblendsmyshowahazewhencooledto0to1°C.Ifahazeisobservedin8.5,itshallbeindicated
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 acceptable SI units are to be regarded as the 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 hazardwarning statements, see 7.2 through 7.7.)
2. Referenced Documents
2
2.1 ASTM Standards:
D 4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D 4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants
D 4953 Test Method for Vapor Pressure of Gasoline and Gasoline-Oxygenate Blends (Dry Method)
D 5190 Test Method for Vapor Pressure of Petroleum Products (Automatic Method)
D 5191 Test Method for Vapor Pressure of Petroleum Products (Mini Method)
3. Terminology
3.1Definitions of Terms Specific to This Standard: Terminology
3.1 Definitions:
3.1.1 dry vapor pressure equivalent (DVPE)—a value calculated by a correlation equation (see 13.2) from the total pressure.
3.1.1.1Discussion—The DVPE is expected to be equivalent to the value obtained on the sample by Test Method D4953. dry
1
This test method is under the jurisdiction ofASTM Committee D02 on Petroleum products and Lubricants and is the direct responsibility of Subcommittee D02.08.OD
on RVP and V/L Ratio.
Current edition approved May 10, 2001. Published July 2001. Originally published as D5482–93. Last previous edition D5482–99.
1
This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.08.0D
on Vapor Pressure and V/L Ratio.
Current edition approved Nov. 1, 2007. Published January 2008. Originally approved in 1993. Last previous edition approved in 2001 as D 5482–01.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 05.02.volume information, refer to the standard’s Document Summary page on 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.
1
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