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 (ISO 6974-2:2012)
15-05-2012
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
This part of ISO 6974 describes the process required to determine the uncertainty associated with the molefraction for each component from a natural gas analysis in accordance with ISO 6974‑1.
| Committee |
CEN/TC 238
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Standards | Relationship |
| PN EN ISO 6974-2 : 2012 | Identical |
| NBN EN ISO 6974-2 : 2012 | Identical |
| UNI EN ISO 6974-2 : 2012 | Identical |
| SN EN ISO 6974-2:2012 | Identical |
| ISO 6974-2:2012 | Identical |
| SS-EN ISO 6974-2:2012 | Identical |
| UNE-EN ISO 6974-2:2013 | Identical |
| NS EN ISO 6974-2 : 2012 | Identical |
| I.S. EN ISO 6974-2:2012 | Identical |
| DIN EN ISO 6974-2:2012-11 | Identical |
| NEN EN ISO 6974-2 : 2012 | Identical |
| NF EN ISO 6974-2 : 2012 | Identical |
| BS EN ISO 6974-2:2012 | Identical |
| 14/30288159 DC : 0 | BS EN 16726 - GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
| BS EN 16723-2:2017 | Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network Automotive fuels specification |
| 14/30296490 DC : 0 | BS EN 16723-2 - NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUEL SPECIFICATIONS |
| I.S. EN 16723-2:2017 | NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION |
| DIN EN 16723-2:2017-10 | NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION |
| DIN EN 16723-2:2014-06 (Draft) | NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION |
| I.S. EN 16726:2015 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
| 14/30296487 DC : 0 | BS EN 16723-1 - NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 1: SPECIFICATIONS FOR BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK |
| DIN EN 16726:2016-04 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
| EN 16723-2:2017 | Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network - Part 2: Automotive fuels specification |
| EN 16726:2015 | Gas infrastructure - Quality of gas - Group H |
| BS EN 16726 : 2015 | GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H |
| UNE-EN 16726:2016 | Gas infrastructure - Quality of gas - Group H |
| 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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