ISO INTERNATIONAL STANDARD 20321 First edition 2020-03 Petroleum, petrochemical and natural gas industries - Safety of machineries - Powered elevators Industries du pétrole, de la pétrochimie et du gaz naturel - Sécurite des machines-Elevateurs motorisés Reference number IS0 20321:2020(E) ISO @ IS0 2020 IS0 20321:2020(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2020 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2020 - All rights reserved