ASTM D6377-08
(Test Method)Standard Test Method for Determination of Vapor Pressure of Crude Oil: VPCRx (Expansion Method)
Standard Test Method for Determination of Vapor Pressure of Crude Oil: VPCR<sub>x</sub> (Expansion Method)
SIGNIFICANCE AND USE
Vapor pressure of crude oil at various V/Ls is an important physical property for shipping and storage.
Note 2—A vapor-liquid ratio of 0.02:1 (X = 0.02) mimics closely the situation of an oil tanker.
Vapor pressure of crude oil is important to crude oil producers and refiners for general handling and initial refinery treatment.
The vapor pressure determined by this test method at a vapor-liquid ratio of 4:1 (VPCR4) of crude oil at 37.8°C can be related to the vapor pressure value determined on the same material when tested by Test Method D 323 (see Appendix X1).
Chilling and air saturation of the sample prior to the vapor pressure measurement is not required.
This test method can be applied in online applications in which an air saturation procedure prior to the measurement cannot be performed.
SCOPE
1.1 This test method covers the use of automated vapor pressure instruments to determine the vapor pressure exerted in vacuum of crude oils. This test method is suitable for testing samples that exert a vapor pressure between 25 and 180 kPa at 37.8°C at vapor-liquid ratios from 4:1 to 0.02:1 (X = 4 to 0.02).
Note 1—This test method is suitable for the determination of the vapor pressure of crude oils at temperatures from 0 to 100°C and pressures up to 500 kPa, but the precision and bias statements (see Section 14) may not be applicable.
1.2 This test method allows the determination of vapor pressure for crude oil samples having pour points above 0°C.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 7.2.1-7.3.2.
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Designation:D6377–08
Standard Test Method for
Determination of Vapor Pressure of Crude Oil:
1
VPCR (Expansion Method)
x
This standard is issued under the fixed designation D6377; 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* D4177 Practice for Automatic Sampling of Petroleum and
Petroleum Products
1.1 This test method covers the use of automated vapor
D5191 Test Method for Vapor Pressure of Petroleum Prod-
pressureinstrumentstodeterminethevaporpressureexertedin
ucts (Mini Method)
vacuum of crude oils. This test method is suitable for testing
D5853 Test Method for Pour Point of Crude Oils
samples that exert a vapor pressure between 25 and 180 kPa at
D6708 PracticeforStatisticalAssessmentandImprovement
37.8°Catvapor-liquidratiosfrom4:1to0.02:1(X=4to0.02).
of Expected Agreement Between Two Test Methods that
NOTE 1—This test method is suitable for the determination of the vapor
Purport to Measure the Same Property of a Material
pressure of crude oils at temperatures from 0 to 100°C and pressures up
to 500 kPa, but the precision and bias statements (see Section 14) may not
3. Terminology
be applicable.
3.1 Definitions:
1.2 This test method allows the determination of vapor
3.1.1 platinum resistance thermometer, n—temperature
pressure for crude oil samples having pour points above 0°C.
measuring device constructed with a length of platinum wire,
1.3 The values stated in SI units are to be regarded as
whose electrical resistance changes in relation to temperature.
standard. No other units of measurement are included in this
3.1.2 vapor-liquid ratio (V/L), n—the ratio of the vapor
standard.
volumetotheliquidvolumeofspecimen,inequilibrium,under
1.4 This standard does not purport to address all of the
specified conditions.
safety concerns, if any, associated with its use. It is the
3.2 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
3.2.1 dead crude oil—a term usually employed for crude
priate safety and health practices and determine the applica-
oils that, when exposed to normal atmospheric pressure at
bility of regulatory limitations prior to use. For specific
room temperature, will not result in actual boiling of the
warning statements, see 7.2.1-7.3.2.
sample.
3.2.1.1 Discussion—Sampling and handling of dead crude
2. Referenced Documents
oils can usually be done without problems in normal, non-
2
2.1 ASTM Standards:
pressurized sample containers, such as cans and so forth.
D323 Test Method for Vapor Pressure of Petroleum Prod-
3.2.2 live crude oil—a term usually employed for crude oils
ucts (Reid Method)
contained in pressurized systems that, when brought to normal
D2892 Test Method for Distillation of Crude Petroleum
atmospheric pressure at room temperature, will result in actual
(15-Theoretical Plate Column)
boiling of the sample.
D3700 Practice for Obtaining LPG Samples Using a Float-
3.2.2.1 Discussion—Sampling and handling of samples of
ing Piston Cylinder
livecrudeoilswillnecessitatetheuseofpressurecylindersand
D4057 Practice for Manual Sampling of Petroleum and
preclude the use of normal sample containers, such as cans and
Petroleum Products
so forth.
3.2.3 Reid vapor pressure equivalent (RVPE)—a value cal-
1
This test method is under the jurisdiction of ASTM Committee D02 on culated by a defined correlation equation (see 14.3) from
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
VPCR ,thatisexpectedtobecomparabletothevaporpressure
4
D02.08 on Volatility.
value obtained by Test Method D323.
Current edition approved July 1, 2008. Published August 2008. Originally
3.2.4 vapor pressure of crude oil (VPCR , n—the pressure
approved in 1999. Last previous edition approved in 2003 as D6377–03. DOI: x)
10.1520/D6377-08.
exerted in an evacuated chamber at a vapor-liquid ratio of X:1
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
by conditioned or unconditioned crude oil, which may contain
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
gas, air or water, or a combination thereof, where X may vary
Standards volume information, refer to the standard’s Document Summary page on
from 4 to 0.02.
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.
1
---------------------- Page: 1 ----------------------
D6377–08
3.3 Abbreviations: sampleintroductionintothemeasuringchamberandexpansion
3.3.1 ARV, n—accepted
...
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:D6377–03 Designation:D6377–08
Standard Test Method for
Determination of Vapor Pressure of Crude Oil:
1
VPCR (Expansion Method)
x
This standard is issued under the fixed designation D 6377; 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*
1.1This test method covers the use of automated vapor pressure instruments to determine the vapor pressure of crude oils at
temperatures between 5 and 80°C for vapor-liquid ratios from 4:1 to 0.02:1 (X = 4 to 0.02) and pressures from 7 to 500 kPa (1.0
to 70 psi).
1.2ThevaluesstatedinSIunitsareregardedasstandard.Theinch-poundunitsgiveninparenthesesareprovidedforinformation
only.
1.3This 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.
1.1 This test method covers the use of automated vapor pressure instruments to determine the vapor pressure exerted in vacuum
of crude oils. This test method is suitable for testing samples that exert a vapor pressure between 25 and 180 kPa at 37.8°C at
vapor-liquid ratios from 4:1 to 0.02:1 (X=4to 0.02).
NOTE 1—This test method is suitable for the determination of the vapor pressure of crude oils at temperatures from 0 to 100°C and pressures up to
500 kPa, but the precision and bias statements (see Section 14) may not be applicable.
1.2 This test method allows the determination of vapor pressure for crude oil samples having pour points above 0°C.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 7.2.1-7.3.2.
2. Referenced Documents
2
2.1 ASTM Standards:
D 323 Test Method for Vapor Pressure of Petroleum Products (REID(Reid Method)
D 2892 Test Method for Distillation of Crude Petroleum (15-Theoretical Plate Column)
D 3700 Practice for Obtaining LPG Samples Using a Floating Piston Cylinder
D 4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D 4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D 5191 Test Method for Vapor Pressure of Petroleum Products (Mini Method)
D 5853Test Method for Pour Point of Crude Oils Test Method for Pour Point of Crude Oils
D 6708 Practice for StatisticalAssessment and Improvement of ExpectedAgreement Between Two Test Methods that Purport
to Measure the Same Property of a Material
3. Terminology
3.1Definitions of Terms Specific to This Standard: Terminology
3.1 Definitions:
3.1.1 platinum resistance thermometer, n— temperature measuring device constructed with a length of platinum wire, whose
electrical resistance 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 D02.08 on
Volatility.
Current edition approved Dec.July 1, 2003.2008. Published January 2004.August 2008. Originally approved in 1999. Last previous edition approved in 19992003 as
D6377–99.D 6377–03.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
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
---------------------- Page: 1 ----------------------
D6377–08
3.1.2 vapor-liquid ratio (V/L), n—the ratio of the vapor volume to the liquid volume of specimen, in equilibrium, under
specified conditions.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 dead crude oil—a term usually employed for crude oils that, when exposed to normal atmospheric pressure at room
temperature, will not result in actual boiling of
...
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