ISO-23874-2006.pdf
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1、 Reference number ISO 23874:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 23874 First edition 2006-11-15 Natural gas Gas chromatographic requirements for hydrocarbon dewpoint calculation Gaz naturel Exigences relatives la chromatographie en phase gazeuse pour le calcul du point de rose hydrocarbures C
2、opyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 22:24:07 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 23874:2006(E) PDF disclaimer This PDF file m
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5、ion parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006 All rights reserved. Unless
6、 otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO cop
7、yright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA
8、Technical Standards 1/9972545001 Not for Resale, 04/12/2007 22:24:07 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 23874:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv 1 Scope 1 2 Normative references1 3 Principle2 4 Materials .2 5 Apparatus .2 6 P
9、erformance requirements.3 7 Sampling.3 8 Analytical procedure .4 9 Methods of test 7 10 Uncertainty in composition 9 11 Calculation of dewpoint temperature 9 12 Analytical uncertainty contribution to dewpoint temperature9 Annex A (informative) Typical analytical conditions for C5 to C12 analysis 10
10、Annex B (informative) Validation of fraction data12 Annex C (informative) Precision of area ratio 16 Annex D (informative) Recommendations on sample calibration gas introduction 20 Annex E (informative) Calculation of fraction quantities, boiling points and component uncertainties.22 Bibliography26
11、Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 22:24:07 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 23874:2006(E) iv ISO 2006 All rights reserv
12、ed Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which
13、a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matt
14、ers of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circul
15、ated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsib
16、le for identifying any or all such patent rights. ISO 23874 was prepared by Technical Committee ISO/TC 193, Natural gas, Subcommittee SC 1, Analysis of natural gas. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/997
17、2545001 Not for Resale, 04/12/2007 22:24:07 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 23874:2006(E) ISO 2006 All rights reserved 1 Natural gas Gas chromatographic requirements for hydrocarbon dewpoint calculation 1 Scope This International S
18、tandard describes the performance requirements for analysis of treated natural gas of transmission or pipeline quality in sufficient detail so that the hydrocarbon dewpoint temperature can be calculated using an appropriate equation of state. It can be applied to gases that have maximum dewpoint tem
19、peratures (cricondentherms) between 0 C and 50 C. The pressures at which these maximum dewpoint temperatures are calculated are in the range 2 MPa (20 bar) to 5 MPa (50 bar). Major components are measured using ISO 6974 (all parts) and the ranges of components that can be measured are as defined in
20、ISO 6974-1. The procedure given in this International Standard covers the measurement of hydrocarbons in the range C5 to C12. n-Pentane, which is quantitatively measured using ISO 6974 (all parts), is used as a bridge component and all C6 and higher hydrocarbons are measured relative to n-pentane. 2
21、 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6974-1, Natural gas Det
22、ermination of composition with defined uncertainty by gas chromatography Part 1: Guidelines for tailored analysis ISO 6974-2, Natural gas Determination of composition with defined uncertainty by gas chromatography Part 2: Measuring-system characteristics and statistics for processing of data ISO 697
23、4-3, 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 6974-4, Natural gas Determination of composition with defined uncertainty by
24、 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 6974-5, Natural gas Determination of composition with defined uncertainty by gas chromatography Part 5: Determination of nitrog
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