ISO INTERNATIONAL STANDARD 28520 First edition 2009-02-15 Ships and marine technology - Lubricating oil systems Guidance for grades of cleanliness and flushing Naviresettechnologiemaritime-Circuitsd'huile degraissage- Guiderelatifauxdegrés deproprete et de ringage Reference number ISO28520:2009(E) ISO @ISO2009 976803100 Notfor Resale, 01/23/2011 14:33:35 MST ISO28520:2009(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 installed on the computer performing the editing. In accepts no liability in this area. 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 file; the PDF-creation COPYRIGHTPROTECTEDDOCUMENT ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Casepostale56:CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ational Organization for Standardizatior ISO 2009-All rights reserved No reproduction or networking pemited without license from IHS Not for Resale, 01/23/2011 14:33:35 MST ISO28520:2009(E) Contents Page Foreword. .iv 1 Scope. 2 Normativereferences Terms and definitions.. 4 Recommended degrees ofpipe cleaning. 4.1 Degrees ofpipe cleaning during/afterprefabrication. 4.2 Inside surface treatment............. 5 Cleaningofsystemcomponents 5.1 Pumps,valves,filters,oilcoolers,etc. 5.2 Engine crankcase.. 5.3 Gearbox. 5.4 5.5 Specialcomments 6 Flushing.... 6.1 Flushing practice (2-stroke engine) 6 6.2 4-strokeengines (practical execution) 12 6.3 Flushing execution... 12 6.4 Flushing practice (turbines and turbo generators) 13 7 Approval offlushing.. 13 anizaninfarsandardizalon'ghts reserved ili ed by IHS under license with ISO 9976803100 d without license from IHS Not for Resale, 01/23/2011 14:33:35 MST ISO28520:2009(E) Foreword ISO (the International Organization for Standardization)is a worldwidefederation ofnational standards bodies International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75%of the memberbodies castinga vote rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO28520waspreparedbyTechnicalCommitteeISO/TC8,Shipsandmarinetechnology,Subcommittee Sc 3, Piping andmachinery. @Iso2009-All rights reserved INTERNATIONALSTANDARD ISO28520:2009(E) Ships and marine technologyLubricating oil systems Guidance for grades of cleanliness and flushing 1 Scope This International Standard provides guidance for flushing of lubricating oil systems, and grading of the resultant cleanliness.The flushing process is twofold: to remove dirt from the erection and installation, and to demonstrate that the pipes and the system as a whole is sufficiently clean. Crankcase and, where applicable, gearbox etc.are cleaned separately before flushing, and requirements relating to this are also specified in this International Standard. Similar considerations apply to the system tank and other components of the system. For this International Standard, the cleaning process is considered as "washing through" when the Reynolds number, Re, is ≤ 3 000, and“flushing"when the Re ≥ 3 000. NOTE If available, any original equipment manufacturer requirements for flushing take precedence over the requirements outlined in this International Standard. 2 Normative references The following referenc