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00128 A NEW DEVICE FOR SIDE BEND TESTING ON PIPE SEAM WELDS

Picture for 00128 A NEW DEVICE FOR SIDE BEND TESTING
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Product Number: 51300-00128-SG
ISBN: 00128 2000 CP
Author: Jean-Louis Crolet and Guy G. Maisonneuve
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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. keywords : ERW pipes, side bend test, HIC, SOHIC

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. keywords : ERW pipes, side bend test, HIC, SOHIC

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