ISO INTERNATIONAL STANDARD 23874 First edition 2006-11-15 Natural gas Gas chromatographic requirements for hydrocarbon dewpoint calculation Gaz naturel Exigences relatives a la chromatographie en phase gazeuse pour le calcul du point de rosée hydrocarbures Reference number ISO 23874:2006(E) Licensed to:Qin, O Downloaded:201 Singleuserliceno Eand networking prohibited @ ISO 2006 ISO 23874:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but accepts no liability in this area. Adobe is a trademarkof AdobeSystems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation 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 ?ISO2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland Licensed to:Qin, Luo Mrs Downloaded:2015-07-17 Single user licence only, copying and networking prohibited ii @ISO2006-All rights reserved ISO 23874:2006(E) Contents Page Foreword 1 Scope 2 Normative references 3 Principle.. 4 Materials 5 Apparatus. 6 Performance requirements 7 Sampling ... 8 Analytical procedure . 9 Methods of test .. 10 Uncertainty in composition . 11 Calculation of dewpoint temperature .. 9 12 Analytical uncertainty contribution to dewpoint temperature .. 9 Annex A (informative) Typical analytical conditions for Cs to C12 analysis ... Annex B (informative) Validation of fraction data.. Annex C (informative) Precision of area ratio ... Annex D (informative) Recommendations on sample calibration gas introduction .. Annex E (informative) Calculation of fraction quantities, boiling points and component uncertainties.... Bibliography. ...26 Licensed to:Qin, Luo Mrs. Downloaded:2015-07-17 ngleuser licenceonly,copyingand networkingprohibited @Is02006-All rightsreserved ii ISO 23874:2006(E) 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 non-governmental,inliaisonwithIsO,also take partin the work.Iso collaborates closely withthe International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated 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 responsible 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 naturalgas. Licensedto:Qin,LuoMrs Single user licence only, copying and networking prohibited iv @IsO2006-All rights reserved INTERNATIONAL STANDARD ISO 23874:2006(E) Natural gas Gas chromatographic requirements for hydrocarbon dewpoint calculation 1 Scope This International Standard describes the performance requirements for analysis of treated natural gas of calculated using an appropriate equation of state. It can be applied to gases that have maximum dewpoint