ISO INTERNATIONAL STANDARD 14691 Second edition 2008-12-01 Petroleum, petrochemical and natural gas industries Flexible couplings for mechanical power transmission - General-purpose applications Industries du petrole, de la pétrochimie et du gaz naturel - Accouplementsflexiblespourtransmissiondepuissancemecanique Applications d'usage general Reference number ISO14691:2008(E) @ISO2008 Copyright Intemational Organization for Standardization vithout license from IHS Not for Resale ISO14691:2008(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 the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT @1SO2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utlized 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 ISQ'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 @ ISO 2008 - All rights reserved without license from IHS Not for Resale ISO14691:2008(E) Contents Page Foreword. Introduction 1 Scope. 2 Normative references 3 Terms and definitions... 4 Statutoryrequirements 5 Coupling selection.... 5.1 General.. 5.2 Compliance. 6 Purchaser's specification .... 7 Coupling rating ... 8 Construction requirements.... 9 8.1 9 8.2 Materials of construction 10 8.3 Coupling hubs... 11 8.4 12 8.5 Electrical insulation.... 12 8.6 Alignmentprovision.. 12 8.7 Rotor dynamic data 12 8.8 Non-horizontal applications .... 13 8.9 Additional requirements for gear couplings... 13 8.10 Additional requirementsformetallicflexible-elementcouplings. 13 8.11 Additional requirementsforelastomericcouplings .... 13 9 Balance 14 9.1 Objectives.. 14 9.2 Balancequality. 14 9.3 Additional balancing requirements. 15 9.4 Verification of coupling balance .... 15 10 Accessories.. 15 11 Manufacturing quality, inspection, testing and preparation for shipment... .15 11.1 Manufacturing quality...... 11.2 Inspectionandtesting.. .16 11.3 Preparation for shipment... 16 12 Vendor's data 16 12.1 16 12.2 Proposals. 16 12.3 Contract data. 17 AnnexA (informative)Examplesofmisalignment.... .19 Annex B(informative)Example of the determination of potential unbalance ... 21 Annex C (informative) Coupling tapers... .. 24 . 25 Annex D (normative) Coupling guards . Annex E (informative)Coupling datasheets.. ..27 Bibliography 32 ili CopyrahtIntematlinal organizaon fcr standardzallonghts reserved hout license from IHS Not for Resale ISO14691:2008(E) 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 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. The main task of technical committees is to prepare International Standards. Draft International Standards 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 member bodies casting a vote. Attention is drawn to the possibility that some of the elements of th