ISO INTERNATIONAL STANDARD 12213-1 Second edition 2006-11-15 Natural gas --- Calculation of compressionfactor- Part 1: Introduction and guidelines Gaznaturel-Calculdufacteurdecompression - Partie1:Introduction et lignes directrices Reference number ISO 12213-1:2006(E) OS1 @ISO2006 ISO12213-1:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this fle may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. AdobeisatrademarkofAdobeSystemslncorporated. 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 aproblem relating to it is found, please infom 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, electronic or mechanical, including photocopying and microfilm, without permission in writing from either Iso at the address below or IsO's memberbody inthe country of therequester. ISo copyright office Casepostale56.CH-1211Geneva20 Tel.+ 4122 749 0111 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii ISO2006-All rights reserved ISO12213-1:2006(E) Contents Page Foreword iv 1 Scope 2 Normative references. 3 Terms and definitions.. 4 General principles.. 4 5 Guidelines..... 5.1 Pipelinequalitynaturalgases 5 5.2 Othergasesandotherapplications. 8 AnnexA(normative)Symbols and units.. 11 AnnexB(informative)Computerprogram. 12 Bibliography. @ IS0 2006 -All rights reserved it ISO12213-1:2006(E) Foreword Iso (the International Organization forStandardization)is a woridwide federationof national standards bodies (IsO member bodies).The work of preparing International Standards is normally carried out through ISO technical committees.Each memberbody interested in a subjectfor which a technical committee has been establishedhastherightto be representedon that committee.International organizations,governmental and non-governmental, in liaison with Iso, also take part in the work.Iso collaborates ciosely with the International Electrotechnical Commission (IEC)onallmatters of electrotechnical standardization. International Standards aredrafted in accordance with the rules given in theISO/lEcDirectives,Part2. The main task of technical committees is to prepare Internationai Standards.Draft International Standards adopted by the technicai committees are circulated to the member bodies for voting. Publication as an International Standard requiresapprovalbyatleast75%of thememberbodies castingavote. 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. ISO12213-1waspreparedbyTechnicalCommitteeiSO/TC193,Naturalgas,SubcommitteeSC1,Analysis ofnaturalgas. This sccond edition cancels andreplaces the first edition (ts0 12213-1:1997),of which it constitutes a minor Iso12213consistsofthefollowingparts,underthegeneraltitleNaturalgas-Calculationofcompression factor. Part1:Introductionandguidelines Part2:Calculationusingmolar-compositionanalysis Part3:Calculationusing physical properties iv ISO 2006 -All rights reserved ISO 12213-1:2006(E) INTERNATIONAL STANDARD Natural gas--- Calculation of compressionfactor Part 1: Introduction and guidelines Scope 1 Iso12213 specifies methodsfor the calculation of compression factors of natural gases,natural gases containing a synthetic admixture and similarmixtures at conditions under which the mixture can exist only as a gas. It is divided into three parts: this pa