Skip to content
Please enter a keyword to search

  • UNE-EN ISO 6974-5:2015

    Current The latest, up-to-date edition.

    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)

    Available format(s):  Hardcopy, PDF

    Language(s):  Spanish, Castilian, English

    Published date:  14-01-2015

    Publisher:  Asociacion Espanola de Normalizacion

    Add To Cart

    Table of Contents - (Show below) - (Hide below)

    Foreword
    Introduction
    1 Scope
    2 Normative references
    3 Principle
    4 Materials
    5 Apparatus
    6 Procedure
      6.1 Gas chromatographic operating conditions
      6.2 Calibration
      6.3 Performance requirements
          6.3.1 Peak resolution
          6.3.2 Chromatogram
      6.4 Determination
          6.4.1 Sample valve purge
          6.4.2 Analysis
    7 Expression of results
      7.1 Precision and accuracy
    8 Test report
    Annex A (informative) Procedure for setting valve timings
    and restrictor setting
    Annex B (informative) Typical precision values
    Bibliography

    Abstract - (Show below) - (Hide below)

    Describes the gas chromatographic method for the quantitative determination of natural gas constituents using a three-column system.

    General Product Information - (Show below) - (Hide below)

    Committee CTN 60
    Document Type Standard
    Publisher Asociacion Espanola de Normalizacion
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 6976:2016 Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition
    ISO 6974-2:2012 Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 2: Uncertainty calculations
    ISO 10723:2012 Natural gas Performance evaluation for analytical systems
    ISO 6974-1:2012 Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 1: General guidelines and calculation of composition
    ISO 7504:2015 Gas analysis Vocabulary
    ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
    View more information

    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective