ISO INTERNATIONAL STANDARD 6627 Third edition 2022-02 Internal combustion engines Piston rings Expander/rail oil-control rings Reference number IS0 6627:2022(E) ISO @ ISO 2022 IS0 6627:2022(E) COPYRIGHT PROTECTED DOCUMENT IS02022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may the internet or an intranet, withoutpriorwrittenpermission.Permission can be requested from eitherIso at the addressbelow or Iso's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214Vernier,Geneva Phone: +4122 749 0111 Email: copyright@iso.org Website: www.iso.org PublishedinSwitzerland i @ IS0 2022 - All rights reserved