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ASTM D2889-95(2005)

(Test Method)

Standard Test Method for Calculation of True Vapor Pressures of Petroleum Distillate Fuels

Standard Test Method for Calculation of True Vapor Pressures of Petroleum Distillate Fuels

SCOPE
1.1 This test method describes the calculation of true vapor pressures of petroleum distillate fuels for which distillation data may be obtained in accordance with Test Method D86 without reaching a decomposition point prior to obtaining 90 volume% distilled.  
1.2 The test method may be used to calculate vapor pressures at temperatures between the 0% equilibrium flash temperature and the critical temperature of the fuel. Provision is included for obtaining a calculated critical temperature for fuels for which it is not known.  
1.3 Critical pressure-temperature data are usually not available for petroleum fuels. However, if both the critical pressure and critical temperature are known, the values shall be used as the coordinates in Fig. 3 to establish a critical point to be used instead of the focal point established as described in 6.5.4; and the calculations described in 6.5 through 6.5.4 are not required. If either a determined true boiling point or determined equilibrium flash vaporization temperature at 0% distilled at atmospheric pressure is known, the determined value shall be used to establish the lower limit of the bubble-point line referred to in 6.4.  
1.4 The method is not reliable for distillate fuels having a boiling range of less than 100°F (38°C) between the Test Method D86 10 and 90 volume% distilled temperatures.  
1.5 The values stated in inch-pound 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.

General Information

Status
Historical
Publication Date
31-Oct-2005
ICS
75.080 - Petroleum products in general
75.160.20 - Liquid fuels
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.04.0K - Correlative Methods
Current Stage
Ref Project

Relations

Replaces
ASTM D2889-95(2000) - Standard Test Method for Calculation of True Vapor Pressures of Petroleum Distillate Fuels
Effective Date
01-Nov-2005
Replaced By
ASTM D2889-95(2005)e1 - Standard Test Method for Calculation of True Vapor Pressures of Petroleum Distillate Fuels
Effective Date
01-Nov-2005

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ASTM D2889-95(2005) - Standard Test Method for Calculation of True Vapor Pressures of Petroleum Distillate FuelsASTM D2889-95(2005) - Standard Test Method for Calculation of True Vapor Pressures of Petroleum Distillate Fuels
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ASTM D2889-95(2005) - Standard Test Method for Calculation of True Vapor Pressures of Petroleum Distillate Fuels
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation:D2889–95 (Reapproved 2005)
Standard Test Method for
Calculation of True Vapor Pressures of Petroleum Distillate
1
Fuels
This standard is issued under the fixed designation D2889; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This test method describes the calculation of true vapor
pressures of petroleum distillate fuels for which distillation
2. Referenced Documents
data may be obtained in accordance with Test Method D86
2
2.1 ASTM Standards:
without reaching a decomposition point prior to obtaining 90
D86 Test Method for Distillation of Petroleum Products at
volume% distilled.
Atmospheric Pressure
1.2 The test method may be used to calculate vapor pres-
D287 TestMethodforAPIGravityofCrudePetroleumand
sures at temperatures between the 0% equilibrium flash
Petroleum Products (Hydrometer Method)
temperature and the critical temperature of the fuel. Provision
is included for obtaining a calculated critical temperature for
3. Summary of Test Method
fuels for which it is not known.
3.1 Equilibrium flash vaporization (EFV) temperatures are
1.3 Critical pressure-temperature data are usually not avail-
calculated from distillation data (Test Method D86) deter-
able for petroleum fuels. However, if both the critical pressure
mined on the sample. The distillation data, calculated EFV
and critical temperature are known, the values shall be used as
data, and API gravity of the sample are used with a graphical
the coordinates in Fig. 1 to establish a critical point to be used
correlation procedure to obtain two pairs of temperature-
instead of the focal point established as described in 6.5.4; and
pressurecoordinatesthroughwhichthebubble-pointlineofthe
thecalculationsdescribedin6.5through6.5.4arenotrequired.
phase diagram for the sample may be drawn. The calculated
If either a determined true boiling point or determined equi-
true vapor pressure at a specified temperature is obtained by
librium flash vaporization temperature at 0% distilled at
reading the pressure at the intersection of the bubble-point line
atmospheric pressure is known, the determined value shall be
and specified temperature.
used to establish the lower limit of the bubble-point line
referred to in 6.4.
NOTE 1—Details of the procedure and data substantiating its validity
1.4 The method is not reliable for distillate fuels having a for establishing equilibrium flash vaporization temperatures have been
3
published.
boiling range of less than 100°F (38°C) between the Test
MethodD86 10 and 90 volume% distilled temperatures.
4. Significance and Use
1.5 The values stated in inch-pound units are to be regarded
4.1 The true vapor pressure of a distillate fuel is a relative
as standard. The values given in parentheses are mathematical
measurement,bothofthetendencyofthemostvolatileportion
conversions to SI units that are provided for information only
of the fuel to gasify, and of the restraining pressure required to
and are not considered standard.
prevent gasification of the most volatile portion. Thus the
1.6 This standard does not purport to address all of the
measurement is of importance when a fuel is to be utilized in
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This test method is under jurisdiction ofASTM Committee D02 on Petroleum Standards volume information, refer to the standard’s Document Summary page on
Products and Lubricants and is the direct responsibility of Subcommittee D02.04 the ASTM website.
3
on Hydrocarbon Analysis. Edmister, W. C., and Okamoto, K. K., “Applied Hydrocarbon Thermodynam-
Current edition approved Nov. 1, 2005. Published November 2005. Originally ics, Part 12: Equilibrium Flash Vaporization Correlations for Petroleum Fractions,”
approved in 1970. Last previous edition approved in 2000 as D2889–95 (2000). Petroleum Refiner, PEREA, Vol 38, No. 8, 1959, p. 117.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D2889–95 (2005)
FIG. 1 Test MethodD86 Distillation Temperature and Equalization Flash Vaporization Temperature Pressure Conversion Chart
applications where no gasification may be tolerated, and 6.3 Calculate the
...

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4.1 The true vapor pressure of a distillate fuel is a relative measurement, both of the tendency of the most volatile portion of the fuel to gasify, and of the restraining pressure required to prevent gasification of the most volatile portion. Thus the measurement is of importance when a fuel is to be utilized in applications where no gasification may be tolerated, and temperature-pressure conditions are expected to be near the true vapor pressure of the fuel.
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