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BS ISO 3007:1999

Current
Current

The latest, up-to-date edition.

Methods of test for petroleum and its products. BS 2000-69. Petroleum products. Determination of vapour pressure. Reid method
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

06-12-2002

Identical with IP 69/2001.

This International Standard specifies a method for the determination of the vapour pressure of liquid petroleum products consisting of essentially or wholly of hydrocarbon components, or containing oxygenated hydrocarbons of specific types and at specified maximum concentrations. The method does not apply outside these concentration levels, nor to any blends containing methanol or other oxygenated hydrocarbons not covered in note1.

NOTE1 The maximum concentration of ethers containing 5 or more carbon atoms is 15%(V/V), and for ethanol is 10%(V/V). For higher alcohols, the maximum concentration is 7%(V/V).

NOTE2 For the purposes of this International Standard, the term \'%(V/V)\' is used to represent the volume fraction of a material.

For petroleum products containing methanol, or other oxygenated hydrocarbons outside the scope of note1, a dry vapour-pressure test method should be used. For liquefied petroleum gases, ISO4256 should be used. The test method may be applied to volatile crude petroleum with a vapour pressure exceeding 10kPa, although the precision has not been evaluated.

Four procedures are described in this International Standard. Procedures A and В are alternative apparatus configurations for products with a Reid vapour pressure up to 180kPa, Procedure С is applied to liquid products with a Reid vapour pressure above 180kPa, and Procedure D applies to aviation gasolines with a Reid vapour pressure of approximately 50kPa.

Vapour pressure is an important physical property of volatile liquids, and has critical performance implications for automotive and aviation gasolines. Vapour pressure is also one of the properties affecting atmospheric evaporation, and is therefore increasingly used in regulations relating to emissions and air quality control. Vapour pressure is also a critical property limiting the performance and safety of operation of equipment during transfer operations.

NOTE Because the external atmospheric pressure is counteracted by the atmospheric pressure initially in the vapour chamber, the Reid vapour pressure is approximately the \'absolute\' vapour pressure at 37,8 °С. The Reid vapour pressure differs from the true vapour pressure of the sample owing to slight vaporization of the sample and the pressure of water vapour and air in the confined space.

Committee
PTI/13
DevelopmentNote
Also numbered as BS 2000-69(2001) Supersedes 96/122612 DC (07/2002) Reviewed and confirmed by BSI, August, 2004. (11/2004)
DocumentType
Standard
Pages
18
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 3007:1999 Identical

ISO 3170:2004 Petroleum liquids — Manual sampling
ISO 4256:1996 Liquefied petroleum gases — Determination of gauge vapour pressure — LPG method

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