The interconnection from the topside platforms and vessels to the well heads and pumps on the seafloor is necessary to transfer power and data, as well as hydraulic and other fluids to guarantee reliable oil extraction operations.

The umbilical systems form this vital link and they must be able to withstand high mechanical and chemical stresses in harsh environments below the sea.

Umbilicals are composed of bundled elements as electrical cables, optic fiber cables, tubes. Super Duplex Stainless steel is the regular material for steel tubes because of its high mechanical performances and its high corrosion resistance.

This paper deals with the corrosion investigations of UNS S32750 Super Duplex laser welded tubes for umbilical systems. The results show very good corrosion resistance performance of welded tubes in comparison with seamless tubes.

Subject
Test methods, Materials, Materials performance, Tubes, Natural seawater, Base metals, Crevices, Crevice corrosion, Ennoblement, Lasers, Pitting, Corrosion resistance, Stress corrosion cracking
Keywords:
Umbilical, super duplex stainless steel, welded tubes, high mechanical properties, high corrosion resistance
© 2012 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2012
Association for Materials Protection and Performance (AMPP)
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