ISO INTERNATIONAL STANDARD 9906 Second edition 2012-05-01 Rotodynamic pumps Hydraulic performance acceptance tests Grades 1, 2 and 3 Pompes rotodynamiques Essais de fonctionnement hydrauliquepour la réception — Niveaux 1, 2 et 3 Reference number ISO 9906:2012(E) LSO @ ISO 2012 IHS under itted without license from IHS Not for Resale ISO 9906:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2012 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 member body in the country of the requester. ISO copyright office Casepostale56·CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 4122 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2012 -All rights reserved No reproductic etworking permitted without license from IHS Not for Resale ISO 9906:2012(E) Contents Page Foreword ..iv Introduction 1 Scope. 2 Normative references 3 Terms, definitions, symbols and subscripts. 3.1 Terms and definitions. 3.2 Terms relating to quantities. 3 3.3 Symbolsandsubscripts.. 9 4 Pump measurements and acceptance criteria. 10 4.1 General.... 10 4.2 Guarantees 11 4.3 Measurementuncertainty 11 4.4 Performance test acceptance grades and tolerances 15 4.5 Default test acceptance grades for pump application, 21 5 Test procedures 22 5.1 General... 22 5.2 Date of testing .. 22 5.3 Test programme.. 22 5.4 Testing equipment. 22 5.5 Records and report. 22 5.6 Testarrangements 23 5.7 Test conditions. 23 5.8 NPSHtests 23 6 Analysis 26 6.1 Translation of the test results to the guarantee conditions. .26 6.2 Obtaining specified characteristics 27 Annex A (normative) Test arrangements. 28 Annex B (informative) NPSH test arrangements Annex C (informative) Calibration intervals Annex D (informative) Measurement equipment. .41 Annex E (informative) Tests performed on the entire equipment set String test. Annex F (informative) Reporting of test results ..48 AnnexG(informative)Specialtestmethods.. ...52 Annex H (informative) Witnessed pump test... .53 AnnexI(informative)ConversiontoSlunits. .54 Annex J (informative) Measurement uncertainty for NPsH test. .56 Bibliography. .57 ili e with IS Not for Resale