ISO INTERNATIONAL STANDARD 12213-2 Second edition 2006-11-15 Natural gas -- Calculation of compressionfactor Part 2: Calculation using molar-composition analysis GaznaturelCalculdufacteurdecompression- Partie2:Calcul a partirde I'analysede la composition molaire Reference number ISO 12213-2:2006(E) ISO @ISO2006 ISO12213-2:2006(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 shall not be edited unless the typefaces which are embedded are licensed to and instalfed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The Iso Central Secretariat acceptsnoliabilityinthisarea. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the fle; 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 probtem relating to it is found, please inform the Centrat Secretariat at the address given below. ISO2006 All rights reserved. Unless otherwisc spccificd, 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 pemission in writing from either Iso at the address below or isO's memberbodyinthecountryof therequester. ISo copyright office Case postale 56.CH-1211Geneva 20 Tel. + 4122 749 0111 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ISo 2006-All rights reserved ISO 12213-2:2006(E) Contents Page Foreword. iv 1 Scope 2 Normative references ... 3 Terms and definitions. 4 Method of calculation.. 4.1 Principle. 4.2 TheAGA8-92DCequation. 4.3 4.4 Rangesofapplication 4.5 Uncertainty... 5 Computerprogram. AnnexA(normative)Symbolsandunits AnnexB (normative)DescriptionoftheAGA8-92DCmethod.. 10 AnnexC(normative)Examplecalculations. 18 AnnexD(normative)Pressureandtemperatureconversionfactors .19 AnnexE(informative)Performanceoverwiderrangesofapplication. 20 AnnexF(informative)Subroutines inFortranfortheAGA8-92DCmethod... 25 Bibliography... 32 Iso2006-All rights reserved ili ISO 12213-2:2006(E) Foreword Iso (the International Organization forStandardization)is aworldwidefederation of national standardsbodies (IsO member bodies). The work of preparing International Standards is normally carried out through ISo established hasthe rightto be represented on that committee.International organizations,governmental and non-governmental, in liaison with iso, aiso take part in the work. Iso collaborates closely with the International Electrotechnical Commission (IEC)onallmatters ofelectrotechnical standardization. International Standards aredrafted inaccordancewiththerulesgiven in theIsO/IEcDirectives,Part2. adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standardrequiresapprovalbyat least75%ofthememberbodies castingavote. Attention is drawn tothe possibilitythat some of the elements ofthisdocument may be the subject of patent rights. IsO shall not be held responsible for identifying any orall suchpatent rights. isO12213-2waspreparedbyTechnicalCommitteeISO/TC193,Naturalgas,SubcommitteeSC1,Analysis ofnaturalgas. This second edition cancels and replaces the first edition (Is0 12213-2:1997), Table 1 of which has been technically revised. iso12213consistsofthefollowingparts,underthegeneraltitleNatural gas-Calculationof compression factor. Part1:Introductionandguidelines Part2:Calculationusingmolar-compositionanalysis Part3:Calculationusingphysicalproperties iv ISo2006-All rightsreserved [SO 12213-2:2006(E) INTERNATIONAL STANDARD NaturalgasCalculationof compressionfactor- Part 2: Calculation using molar-composition analysis 1 Scope IsO 12213