UNI EN ISO 6974-2 : 2012
Current
The latest, up-to-date edition.
NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 2: UNCERTAINTY CALCULATIONS
19-07-2012
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Calculation of uncertainty
Annex A (informative) - Calculation of processed component
uncertainties for the methane-by-difference approach
Annex B (normative) - Uncertainties of relative response
factors
Annex C (informative) - Alternative calculation of the
uncertainty of the value of the unknown
Bibliography
Defines the process required to determine the uncertainty associated with the mole fraction for each component from a natural gas analysis in accordance with ISO 6974-1.
| Committee |
CT 101
|
| DocumentType |
Standard
|
| PublisherName |
Ente Nazionale Italiano di Unificazione (UNI)
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| DIN EN ISO 6974-2:2012-11 | Identical |
| UNE-EN ISO 6974-2:2013 | Identical |
| NF EN ISO 6974-2 : 2012 | Identical |
| ISO 6974-2:2012 | Identical |
| NBN EN ISO 6974-2 : 2012 | Identical |
| NEN EN ISO 6974-2 : 2012 | Identical |
| NS EN ISO 6974-2 : 2012 | Identical |
| I.S. EN ISO 6974-2:2012 | Identical |
| SN EN ISO 6974-2:2012 | Identical |
| BS EN ISO 6974-2:2012 | Identical |
| EN ISO 6974-2:2012 | Identical |
| ISO 10715:1997 | Natural gas — Sampling guidelines |
| ISO 6974-6:2002 | Natural gas — Determination of composition with defined uncertainty by gas chromatography — Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns |
| ISO 6974-4:2000 | Natural gas — Determination of composition with defined uncertainty by gas chromatography — Part 4: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns |
| ISO 6974-3:2000 | Natural gas Determination of composition with defined uncertainty by gas chromatography Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns |
| ISO Guide 35:2017 | Reference materials — Guidance for characterization and assessment of homogeneity and stability |
| ISO/IEC Guide 99:2007 | International vocabulary of metrology Basic and general concepts and associated terms (VIM) |
| ISO 6974-1:2012 | Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 1: General guidelines and calculation of composition |
| ISO Guide 31:2015 | Reference materials — Contents of certificates, labels and accompanying documentation |
| ISO 6974-5:2014 | 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 Guide 34:2009 | General requirements for the competence of reference material producers |
| 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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