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)
Hardcopy , PDF
Spanish, Castilian, English
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 |
Asociación Española de Normalización
|
| Status |
Current
|
| Standards | Relationship |
| NBN EN ISO 6974-5 : 2014 | Identical |
| I.S. EN ISO 6974-5:2014 | Identical |
| ISO 6974-5:2014 | Identical |
| EN ISO 6974-5:2014 | Identical |
| NEN EN ISO 6974-5 : 2014 | Identical |
| BS EN ISO 6974-5:2014 | Identical |
| DIN EN ISO 6974-5:2014-10 | Identical |
| NF EN ISO 6974-5 : 2014 | Identical |
| NS EN ISO 6974-5 : 2014 | Identical |
| 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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