A comprehensive study, utilizing pipe ring ovalization testing, full scale pressure tests and fracture mechanics evaluation has been performed in order to quantify the influence of residual stress on the sulphide stress cracking behaviour of double submerged arc welded large diameter gas pipeline material.

A procedure to control the weld zone residual stresses is described as are the results from testing pipe material in both the as-welded and post weld thermal treated condition at various levels of residual stresses. Preliminary indications obtained from fracture mechanics evaluation showed that the benefits of the inductive thermal treatment may also include alteration of the as welded metallographic microstructure.

Subject
Constant load, Test methods, Materials, Piping, Stress cracking, Weld seams, Pipe sections, Tensile stress, Steel, Scale, Sulfide stress cracking, Residual stress, Hydrogen
© 1988 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).
1988
Association for Materials Protection and Performance (AMPP)
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