BS EN ISO 6974-5:2014
$167.15
Natural gas. Determination of composition and associated uncertainty by gas chromatography – Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 36 |
This part of this International Standard describes a gas chromatographic method for the quantitative determination of the content of nitrogen, carbon dioxide and C1 to C5 hydrocarbons individually and a composite C6+ measurement, which represents all hydrocarbons of carbon number 6 and above in natural gas samples. It is applicable to the analysis of gases containing constituents within the working ranges given in Table 1.
Table 1
Component working ranges
NOTE 1 The working ranges in Table 1 are those for which the method has been shown to be satisfactory, and are offered for guidance. However, there is no reason why wider ranges should not be used, provided that the successful measurement of such wider ranges has been demonstrated.
NOTE 2 Hydrocarbons above n-pentane are expressed as the “pseudo-component” C6+ which is measured as one composite peak and calibrated as such. The properties of C6+ are calculated from an extended analysis of the individual C6 and higher hydrocarbons.
NOTE 3 Oxygen is not a normal constituent of natural gas and would not be expected to be present in gas sampled to an online instrument. If any oxygen is present as a result of air contamination, it will be measured with the nitrogen. The resulting measured (nitrogen + oxygen) value will be in error to a small extent because of the slight difference between the detector responses of oxygen and nitrogen.
NOTE 4 The helium and argon contents are assumed to be sufficiently small and unvarying that they need not be analysed for.
NOTE 5 The gas sample shall not contain any hydrocarbon condensate and/or water.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Foreword |
| 6 | Foreword |
| 7 | Introduction |
| 9 | Section sec_1 Table tab_1 1 Scope |
| 10 | Section sec_2 Section sec_3 2 Normative references 3 Principle |
| 11 | Figure fig_1 |
| 12 | Section sec_4 Section sec_4.1 Section sec_4.2 Section sec_4.3 Section sec_4.3.1 Section sec_4.3.2 Section sec_5 Section sec_5.1 Section sec_5.2 Section sec_5.3 Section sec_5.4 Section sec_5.5 Section sec_5.6 Section sec_5.7 Section sec_5.8 4 Materials 5 Apparatus |
| 13 | Section sec_5.9 Section sec_5.9.1 Section sec_5.9.1.1 Section sec_5.9.1.2 Section sec_5.9.1.3 Section sec_5.9.2 Section sec_5.9.2.1 Section sec_5.9.2.2 Section sec_5.9.2.3 Section sec_5.10 Section sec_5.11 Section sec_5.12 Section sec_5.13 |
| 14 | Section sec_6 6 Scheme of the configuration |
| 15 | Figure fig_2 Section sec_7 Section sec_7.1 Section sec_7.1.1 7 Procedure 7.1 Control of the apparatus |
| 16 | Section sec_7.2 Section sec_7.2.1 Table tab_2 7.2 Operation of the apparatus |
| 17 | Table tab_3 Section sec_7.2.2 Section sec_7.2.3 |
| 18 | Figure fig_3 Section sec_7.2.4 Table tab_4 Section sec_7.2.5 |
| 19 | Section sec_8 Section sec_8.1 Section sec_8.2 8 Expression of results 8.1 Uncertainty 8.2 Test report |
| 20 | Annex sec_A Annex sec_A.1 Table tab_A.1 Annex A (informative) Example of application |
| 21 | Table tab_A.2 Annex sec_A.2 |
| 22 | Table tab_A.3 |
| 23 | Table tab_A.4 Annex sec_A.3 Annex sec_A.3.1 |
| 24 | Table tab_A.5 |
| 25 | Table tab_A.6 Table tab_A.7 Annex sec_A.3.2 |
| 26 | Table tab_A.8 |
| 27 | Table tab_A.9 |
| 28 | Table tab_A.10 Annex sec_A.4 Annex sec_A.4.1 Annex sec_A.4.2 |
| 29 | Annex sec_A.5 Annex sec_A.6 Annex sec_A.7 |
| 30 | Annex sec_B Annex sec_B.1 Annex sec_B.2 Annex sec_B.3 Annex sec_B.4 Annex sec_B.5 Annex sec_B.6 Annex sec_B.6.1 Annex sec_B.6.2 Annex sec_B.6.3 Annex sec_B.6.4 Annex sec_B.6.5 Annex sec_B.6.6 Annex sec_B.7 Annex B (informative) Procedure for Setting Valve timings and Restrictor Setting |
| 31 | Annex sec_B.7.1 Annex sec_B.7.2 Annex sec_B.7.3 Annex sec_B.7.4 Annex sec_B.7.5 Annex sec_B.8 |
| 32 | Reference ref_1 Reference ref_2 Reference ref_3 Reference ref_4 Bibliography |
