ISO/TR TECHNICAL REPORT 11583 First edition 2012-04-01 Measurement of wet gas flow by means of pressure differential devices inserted in circular cross-section conduits Mesurage du debit de gaz humide au moyen d'appareils déprimogenes inséresdansdesconduitesdesectioncirculaire Reference number ISO/TR 11583:2012(E) @ ISO 2012 by IHS under lic Not for Resale ISO/TR 11583:2012(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2012 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 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 copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2012 - All rights reserved y IHS unde Not for Resale ISO/TR 11583:2012(E) Contents Page Foreword Introduction. 1 Scope. 2 Normative references.. 3 Terms and definitions . 4 Symbols and subscripts.... 5 Principle of the method of measurement and computation 5.1 Principle of the method of measurement... 5.2 Computa.tion ................. 6 Venturi tubes 6.1 6.2 Design requirements... 6.3 Pressure tappings. 6.4 Computation of gas flowrate.... 6.5 Uncertainties... 7 Orificeplates. 9 7.1 General.. 7.2 Design requirements.... .9 7.3 7.4 Pressure tappings ... .9 7.5 Computation of gas flowrate.... 10 7.6 Uncertainties.... 12 8 Tracertechnigues.. 12 8.1 8.2 Technique.... ..13 8.3 Measuring the gas flowrate using tracer techniques ........ 13 9 Comparison method... 14 10 Total mass flowrate known .. .14 11 Using a throttling calorimeter .. .15 12 Installation.. 12.1 Flow conditioners. 15 12.2 Insulation... 12.3 Pressure tappings and impulse lines... 15 12.4 Gas composition ... 16 12.5 Densitometers.... 13 Sampling 17 13.1 General... .17 13.2 Sampling points at the wet-gas meter... 17 13.3 Sampling points at test separators ..... 17 Annex A (informative) Calculations 18 Bibliography. 25 CopyrightInternationalOganzaonSandardizaloightsreserved ii ted withoutlicensefrom IHS Not for Resale