NF EN ISO 6974-5

NF EN ISO 6974-5

October 2014
Standard Current

Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 5 : isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons

ISO 6974-5:2014 describes a gas chromatographic method for the quantitative determination of the content of nitrogen, carbon dioxide and C1 to C5 hydrocarbons individually and a composite C6+ measurement, which represents all hydrocarbons of carbon number 6 and above in natural gas samples.

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Main informations

Collections

National standards and national normative documents

Publication date

October 2014

Number of pages

32 p.

Reference

NF EN ISO 6974-5

ICS Codes

75.060   Natural gas

Classification index

X20-510-5

Print number

1

International kinship

ISO 6974-5:2014

European kinship

EN ISO 6974-5:2014
Sumary
Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 5 : isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons

ISO 6974-5:2014 describes a gas chromatographic method for the quantitative determination of the content of nitrogen, carbon dioxide and C1 to C5 hydrocarbons individually and a composite C6+ measurement, which represents all hydrocarbons of carbon number 6 and above in natural gas samples.

Replaced standards (1)
NF EN ISO 6974-5
August 2003
Standard Cancelled
Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 5 : determination of nitrogen, carbon dioxide and hydrocarbons C1 up to C5 and C6+ hydrocarbons for a laboratory and on-line process application

L'ISO 6974-5:2000 décrit une méthode par chromatographie en phase gazeuse pour la détermination quantitative de constituants du gaz naturel à l'aide d'un système à trois colonnes. Cette méthode est applicable aux gaz naturels de plage limitée, utilisés régulièrement pour l'étalonnage en ligne et automatique d'échantillons de gaz ne contenant pas de condensats d'hydrocarbures et/ou d'eau. Elle est applicable à l'analyse de gaz contenant des constituants dans les limites des gammes de fractions molaires indiquées au Tableau 1 de l'ISO 6974-5:2000. Ces gammes ne représentent pas les limites de détection, mais les limites à l'intérieur desquelles s'applique la fidélité spécifiée de la méthode. Même si la présence d'un ou plusieurs constituants d'un échantillon est susceptible de ne pas être détectée, la méthode peut tout de même être applicable. L'ISO 6974-5:2000 n'est applicable que conjointement avec l'ISO 6974-1 et l'ISO 6974-2.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    2
  • 3 Principe
    2
  • 4 Matériels
    4
  • 5 Appareillage
    4
  • 6 Schéma de configuration
    6
  • 7 Mode opératoire
    7
  • 8 Expression des résultats
    11
  • Annexe A (informative) Exemple d'application
    12
  • Annexe B (informative) Procédure de réglage des temps de commutation des vannes et des restrictions
    22
  • Bibliographie
    24
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