ISO INTERNATIONAL STANDARD 4309 Fifth edition 2017-11 Cranes - Wire ropes - Care and maintenance, inspection and discard Appareils de levage a charge suspendue Cables en acier - Entretien et maintenance, inspection et depose Reference number IS0 4309:2017(E) ISO IS02017 IS0 4309:2017(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. IsO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org i @ IS0 2017 - All rights reserved IS0 4309:2017(E) Contents Page Foreword .V Introduction. ..vi 1 Scope. .1 2 Normative references. .2 3 Terms and definitions .2 4 Care and maintenance. ..4 4.1 General 4 4.2 Rope replacement. .4 4.3 Offloading and storing the rope. .6 4.4 Condition of the rope prior to installation 6 4.5 Installing the rope 7 4.6 Running-in the new rope. 10 4.7 Maintaining the rope.. 11 4.8 Maintenance of rope-related parts of the crane 11 5 Inspection .12 5.1 General. .12 5.2 Daily visual inspections .12 5.3 Periodic inspections 12 5.3.1 General. 12 5.3.2 Frequency 13 5.3.3 Extent of inspection. .13 5.3.4 Inspection at, or in the vicinity of, a termination .14 5.3.5 Inspection record 14 5.4 Inspection following an incident .15 5.5 Inspection following period with crane out of operation 15 5.6 Inspection by magnetic rope test method .15 6 Discard criteria ..15 6.1 General.. .15 6.2 Visible broken wires. .16 6.2.1 Criteria for visible broken wires 16 6.2.2 Use of Tables 3 and 4 and rope category number 16 6.2.3 Wire breaks other than those resulting from service 16 6.2.4 Single-layer and parallel-closed ropes. 17 6.2.5 Rotation-resistant ropes. .19 6.3 Magnetic rope test (MRT) 19 6.4 Decrease in rope diameter. 20 6.4.1 Uniform decrease along the rope. 20 6.4.2 Calculation to determine actual uniform decrease in diameter and expression as percentage of nominal rope diameter 21 6.4.3 Local decrease. 21 6.5 Fracture of strands 21 6.6 Corrosion 21 6.7 Deformation and damage. 22 6.7.1 General. 22 6.7.2 Waviness.. 22 6.7.3 Basketdeformation 23 6.7.4 Core or strand protrusion or distortion 23 6.7.5 Protruding wires in loops. 23 6.7.6 Local increase in rope diameter 23 6.7.7 Flattened portion. 23 6.7.8 Kink or tightened loop 24 6.7.9 Bend in rope. 24 @ IS0 2017 - All rights reserved iii