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    I.S. EN ISO 6976:2016

    Current The latest, up-to-date edition.

    NATURAL GAS - CALCULATION OF CALORIFIC VALUES, DENSITY, RELATIVE DENSITY AND WOBBE INDICES FROM COMPOSITION (ISO 6976:2016)

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-2016

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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

    National Foreword
    European foreword
    Foreword
    Introduction
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Symbols and units
    5 Principles
    6 Behaviour of ideal and real gases
    7 Calculation of calorific value on a molar basis
    8 Calculation of calorific value on a mass basis
    9 Calculation of calorific value on a volume basis
    10 Calculation of associated properties
    11 Uncertainty of calculation
    12 Tables of data
    Annex A (normative) - Values of auxiliary constants
    Annex B (normative) - Formulae for uncertainty calculations
    Annex C (informative) - Conversion factors
    Annex D (informative) - Example calculations
    Bibliography

    Abstract - (Show below) - (Hide below)

    Describes methods for the calculation of gross calorific value, net calorific value, density, relative density, gross Wobbe index and net Wobbe index of natural gases, natural gas substitutes and other combustible gaseous fuels, when the composition of the gas by mole fraction is known.

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

    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Current
    Supersedes

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

    ISO 6974-2:2012 Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 2: Uncertainty calculations
    ISO/IEC Guide 99:2007 International vocabulary of metrology Basic and general concepts and associated terms (VIM)
    ISO 14912:2003 Gas analysis — Conversion of gas mixture composition data
    ISO 80000-1:2009 Quantities and units — Part 1: General
    ISO 6974-1:2012 Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 1: General guidelines and calculation of composition
    ISO 20765-2:2015 Natural gas Calculation of thermodynamic properties Part 2: Single-phase properties (gas, liquid, and dense fluid) for extended ranges of application
    ISO/TR 29922:2017 Natural gas Supporting information on the calculation of physical properties according to ISO 6976
    ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
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