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UNE-EN ISO 6974-5:2015

Current
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

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

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

Committee
CTN 60
DocumentType
Standard
Pages
32
PublisherName
Asociacion Espanola de Normalizacion
Status
Current
Supersedes

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)

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