I.S. EN ISO 6974-1:2012
Current
The latest, up-to-date edition.
NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 1: GENERAL GUIDELINES AND CALCULATION OF COMPOSITION (ISO 6974-1:2012)
Hardcopy , PDF
English
01-01-2012
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principles of analysis
6 Analytical procedure
7 Control chart
8 Test report
Annex A (informative) - Comparative application ranges and
characteristics of analytical methods described
in ISO 6974-3 to ISO 6974-6
Annex B (informative) - Alternative approach to bridging and
normalization
Annex C (informative) - Methane-by-difference approach
Annex D (normative) - Relative response factors
Annex E (informative) - Testing for outliers
Annex F (normative) - Pressure correction during calibration
and sample analysis
Annex G (informative) - Software suitable for generalized least
squares regression analysis
Annex H (informative) - Use of control charts
Bibliography
Provides methods for calculating component mole fractions of natural gas and specifies the data processing requirements for determining component mole fractions.
| DocumentType |
Standard
|
| Pages |
61
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| SN EN ISO 6974-1 : 2012 CORR 2013 | Identical |
| UNI EN ISO 6974-1 : 2012 | Identical |
| UNE-EN ISO 6974-1:2013 | Identical |
| DIN EN ISO 6974-1:2012-11 | Identical |
| NBN EN ISO 6974-1 : 2012 COR 2012 | Identical |
| NEN EN ISO 6974-1 : 2012 C1 2012 | Identical |
| BS EN ISO 6974-1:2012 | Identical |
| NS EN ISO 6974-1 : 2012 AC 2012 | Identical |
| ISO 6974-1:2012 | Identical |
| NF EN ISO 6974-1 : 2012 | Identical |
| ISO 5725-1:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions |
| 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 6974-2:2012 | Natural gas — Determination of composition and associated uncertainty by gas chromatography — Part 2: Uncertainty calculations |
| 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 10723:2012 | Natural gas — Performance evaluation for analytical systems |
| ISO 16664:2017 | Gas analysis — Handling of calibration gases and gas mixtures — Guidelines |
| 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 6143:2001 | Gas analysis — Comparison methods for determining and checking the composition of calibration gas mixtures |
| ISO 6142:2001 | Gas analysis Preparation of calibration gas mixtures Gravimetric method |
| ISO 5725-2:1994 | Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method |
| ISO 5479:1997 | Statistical interpretation of data — Tests for departure from the normal distribution |
| 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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