NF EN ISO 3838

NF EN ISO 3838

December 2004
Standard Current

Crude petroleum and liquid or solid petroleum products - Determination of density or relative density - Capillary-stoppered pyknometer and graduated bicapillary pyknometer methods

ISO 3838:2004 specifies methods for the determination of the density or relative density of crude petroleum and of petroleum products handled as liquids. The capillary-stoppered pyknometer method is also for use with solids and this method may also be used for coal tar products, including road tars, creosote and tar pitches, or for mixtures of these with petroleum products. This method is not suitable for the determination of the density or relative density of highly volatile liquids having Reid vapour pressures greater than 50 kPa according to ISO 3007 or having an initial boiling point below 40 degrees Celsius. The graduated bicapillary pyknometer method is recommended for the accurate determination of the density or relative density of all except the more viscous products, and is particularly useful when only small amounts of samples are available. The method is restricted to liquids having Reid vapour pressures of 130 kPa or less according to ISO 3007 and having kinematic viscosities less than 50 mm2/s (50 centistokes (cSt)) at the test temperature. Special precautions are specified for the determination of the density or relative density of highly volatile liquids.

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National standards and national normative documents

Publication date

December 2004

Number of pages

25 p.

Reference

NF EN ISO 3838

ICS Codes

75.040   Crude petroleum
75.080   Petroleum products in general

Classification index

T60-180

Print number

1 - 06/01/2005

International kinship

ISO 3838:2004

European kinship

EN ISO 3838:2004
Sumary
Crude petroleum and liquid or solid petroleum products - Determination of density or relative density - Capillary-stoppered pyknometer and graduated bicapillary pyknometer methods

ISO 3838:2004 specifies methods for the determination of the density or relative density of crude petroleum and of petroleum products handled as liquids.

The capillary-stoppered pyknometer method is also for use with solids and this method may also be used for coal tar products, including road tars, creosote and tar pitches, or for mixtures of these with petroleum products. This method is not suitable for the determination of the density or relative density of highly volatile liquids having Reid vapour pressures greater than 50 kPa according to ISO 3007 or having an initial boiling point below 40 degrees Celsius.

The graduated bicapillary pyknometer method is recommended for the accurate determination of the density or relative density of all except the more viscous products, and is particularly useful when only small amounts of samples are available. The method is restricted to liquids having Reid vapour pressures of 130 kPa or less according to ISO 3007 and having kinematic viscosities less than 50 mm2/s (50 centistokes (cSt)) at the test temperature.

Special precautions are specified for the determination of the density or relative density of highly volatile liquids.

Replaced standards (1)
NF EN ISO 3838
March 1996
Standard Cancelled
Crude petroleum and liquid or solid petroleum products. Determination of density or relative density. Capillary-stoppered pyknometer and graduated bicapillary pyknometer methods.

Table of contents
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  • Avant-propos
    iv
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Principe
    2
  • 4.1 Pycnomètre à bouchon capillaire
    2
  • 4.2 Pycnomètre bicapillaire gradué
    2
  • 5 Appareillage
    2
  • 6 Préparation du pycnomètre
    6
  • 7 Étalonnage du pycnomètre
    6
  • 7.1 Préparation
    6
  • 7.2 Pycnomètre à bouchon capillaire
    8
  • 7.3 Pycnomètre bicapillaire gradué
    8
  • 7.4 Autres températures de référence
    9
  • 7.5 Réétalonnage
    9
  • 8 Mode opératoire concernant les pycnomètres à bouchon capillaire
    9
  • 8.1 Mode opératoire pour les liquides
    9
  • 8.2 Mode opératoire pour les échantillons solides ou semi-solides
    10
  • 9 Mode opératoire concernant les pycnomètres bicapillaires gradués
    10
  • 10 Calculs
    11
  • 10.1 Symboles
    11
  • 10.2 Référence, étalonnage et températures de l'essai
    13
  • 10.3 Corrections dues à la dilatation thermique du pycnomètre
    13
  • 10.4 Calcul de la masse volumique d'un liquide
    14
  • 10.5 Calcul de la densité d'un liquide
    16
  • 10.6 Calcul de la masse volumique ou de la densité d'un produit solide ou semi-solide
    16
  • 11 Fidélité
    17
  • 11.1 Méthode du pycnomètre à bouchon capillaire
    17
  • 11.2 Méthode du pycnomètre bicapillaire gradué
    17
  • 12 Rapport d'essai
    18
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