ISO INTERNATIONAL STANDARD 28522 First edition 2009-02-15 Ships and marine technology - Hydraulic oil systems Guidance for assembly and flushing Naviresettechnologiemaritime-Lessystemeshydrauliquesde petrole-Directivespourassembleretrincer Reference number ISO 28522:2009(E) ISO ISO2009 No reprodu e from IHS Not for Resale ISO28522:2009(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 IS0 2009-Allrights reserved No reproduction or networking pemited without license from IHS Not for Resale ISO28522:2009(E) Contents Page Foreword.. iv 1 Scope. 2 Normativereferences Recommendedguidelinesonassembly. 3.1 3.2 4 Recommended guidelinesforflushing 5 Pressure testing. 6 Commissioning.... ranzaonfarsandardzalonights reserved ili ed by IHS under license with ISO No reproduction or networking permi d without license from IHS Not for Resale ISO28522:2009(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 least 75%of the memberbodies castinga vote. rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO28522waspreparedbyTechnicalCommitteeISO/TC8,Shipsandmarinetechnology,Subcommittee Sc 3, Piping and machinery. ISo2009-Allrights reserved Not for Resale INTERNATIONALSTANDARD ISO28522:2009(E) Ships and marine technologyHydraulic oil systems Guidance for assembly and flushing 1 Scope This International Standard provides guidance for assembly and flushing of hydraulic oil systems. The aim of the flushing process is twofold: to remove dirt from the erection, installation, and to demonstrate that the pipes and the system as a whole are sufficiently clean. correctly. It also gives practical conditions for the flushing oil and filter. 2 Normativereferences The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document(includinganyamendments)applies. Iso28521:1),Shipsandmarinetechnology-Hydraulicoil systems-Guidanceforgradesofcleanliness and flushing 3 Recommendedguidelinesonassembly 3.1General Before assembling it shall be checked that blank-offs on pipes and components are undamaged. If blank-offs are damaged, cleaning shall be repeated. After the pipe system is assembled, it shall be blown through with dry high-pressure air or nitrogen. In order to remove loose dirt and/or dry out the pipes, lint-free cloths may be pulled through the pipes before connection to components. Testing for leakage of the pipe system is done with dry high-pressure air, and/or soap and water (with procedure. Specified flush oil (system or special oil) shall be used to fll the system. System components shall be