ISO INTERNATIONAL STANDARD 10423 Fifth edition 2022-03 Petroleum and natural gas industries Drilling and production equipment Wellhead and tree equipment Industries dupétroleet dugaznaturel-Equipementdeforageetde production-Equipement pourtetes de puits et arbres de Noel Referencenumber IS010423:2022(E) ISO IS02022 IS0 10423:2022(E) COPYRIGHTPROTECTEDDOCUMENT ISO2022 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 anyform or by anymeans, electronic or mechanical, including photocopying, orposting on theinternetoran intranet,withoutpriorwrittenpermission.Permissioncanberequestedfrom eitherIsoattheaddressbelow or ISO's member body in the country of the requester. ISO copyright office CP401 : Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +4122 749 0111 Email: [email protected] Website:www.iso.org Published in Switzerland ii @IS0 2022-All rights reserved