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ASTM D6377-03

Historical Revision

Standard Test Method for Determination of Vapor Pressure of Crude Oil: VPCR<inf>x</inf > (Expansion Method)

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1.1 This test method covers the use of automated vapor pressure instruments to determine the vapor pressure of crude oils at temperatures between 5 and 80C 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).

1.2 The values stated in SI units are regarded as standard. The inch-pound units given in parentheses are provided for information only.

1.3 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.


Vapor pressure of crude oil at various V/Ls is an important physical property for shipping and storage.

Vapor pressure of crude oil is important to crude oil producers and refiners for general handling and initial refinery treatment.

Note 1—A V/L of 0.02:1 (X = 0.02) mimics closely the situation of an oil tanker.

To prevent losses of high volatile compounds, the sample is always maintained at a pressure at least 100 kPa (14.5 psi) higher than the vapor pressure.

The vapor pressure determined by this test method at a V/L 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 allows the determination of VPCR x samples having pour points above 0°C.

SDO ASTM: ASTM International
Document Number D6377
Publication Date Dec. 1, 2003
Language en - English
Page Count 6
Revision Level 03
Supercedes
Committee D02.08
Publish Date Document Id Type View
June 1, 2020 D6377-20 Revision
April 1, 2016 D6377-16 Revision
Oct. 1, 2015 D6377-15 Revision
Oct. 1, 2014 D6377-14 Revision
Oct. 1, 2010 D6377-10 Revision
July 1, 2008 D6377-08 Revision
Dec. 1, 2003 D6377-03 Revision
Jan. 10, 1999 D6377-99 Revision