Following the recent failure of a new electric resistance welded (ERW) pipe line during the hydrotest, and bearing in mind satisfactory previous experience with this type of product, the requirement arose for a short, practical, reliable and inexpensive acceptance test.

The problem is that to evaluate the whole thickness of a metallurgical product, it is necessary to use a side bend test, and that for a pipe seam weld, the specimens are curved, so that the sample holders usually employed in four point bend tests cannot be used. A special specimen holder has therefore been developed, which so far has proved to be fully satisfactory, in terms both of the test procedure and the results obtained.

It has been shown that even for apparently well made ERW pipes, the properties of the bond line can vary significantly from one delivery to another, including those of a given supplier. The side bend test thus represents a valuable tool for both the producer and the end user.

In order to facilitate communication between the different industrial partners, it is proposed to standardize the test as rapidly as possible.

Subject
Test methods, Seams, Materials, Piping, Grooves, Glass, Microscopy, Rods, Stress, Bending, Equipment, Hydrostatic testing, Hydrogen
Keywords:
ERW pipes, side bend test, HIC, SOHIC
© 2000 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).
2000
Association for Materials Protection and Performance (AMPP)
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