ISO INTERNATIONAL STANDARD 5198 First edition 1987-07-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATIONINTERNATIONALEDE NORMALISATION MEKAYHAPOAHAA OPFAHM3ALMRNO CTAHAAPTM3ALMW Centrifugal, mixed flow and axial pumps --. Code for hydraulic performance tests -- Precision class Pompes centrifuges, helico-centrifuges et helices -- Code d'essais de fonctionnement hydraulique-Classe de precision Reference number ISO 5198:1987 (E) Copyright Intermational Organization for Standardization No reproduction or networking permited without license from IHS Not for Resale 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 technicat committees. Each member body interested in a subject for which a technical committee has been estabished has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the iSo Council. They are approved in accordance with isO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 5198 was prepared by Technical Committee ISO/TC 115, Pumps. Users shouid note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. @International Organization for Standardization, 1987 Printed in Switzerland Copyright Intermational Organization for Standardization No reproduction or networking permited without icense from IHS Not fr Resale ISO 5198 : 1987 (E) Contents Page 0 Introduction Scope 2 Field of application 3References Section one: General recommendations 4 Definitions and symbols 3 Specifiedduty 10 General requirements for tests 10 Sectiontwo:Measurementmethods .7 Measurement of rate of flow 17 Measurementofhead 21 9Measurementofspeedofrotation 38 10 Measurement of power input 38 11 Measurement of pump efficiency by the thermodynamic method . 41 Annexes A Estimation and analysis of uncertainties 57 Comparison of test results with specified duty . 61 c Thermodynamic properties of water and assessment of the accuracy of efficiency measurements by the thermodynamic method .... 65 D Other cavitation tests 78 Friction losses 80 Copyright ln No reproduction or networking permited without license from IHS Not for Resale INTERNATIONAL STANDARD ISO5198:1987 (E) Centrifugal, mixed flow and axial pumps -- Code for hydraulic performance tests -- Precision class oIntroduction This InternationalStandard doesnotrecommendanyconstruc- tional tolerance nor any global tolerancefor acceptance pur- This International Standard is the first of a set of International poses; it is devoted to specifying and describing procedure and Standards dealing with performance tests of centrifugal, mixed methods for accurately ascertaining the performance of a pump flow and axial pumps (in the rest of the text referred to as underthe conditionsinwhichitistested. Contractual "pumps"). interpretation of the test results must be the subject of a special agreementbetweenthepartiesconcerned (seeannexB) It specifies precision class tests (former class A). Engineering classI and class Il tests (former classes B and C)will be the Pump performance may be greatly affected.by the installation subject of a further International Standard, 1) conditions, and this must be especially considered when drawing up the contract if a precision class test is to be carried The aims of these classes are quite different. out. The precision class is mainly used for research, develop- ment and scientific purposes in laboratories, where an Scope extremely high