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Displaying records 321 through 321 of 2180
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Title: Burst pressure and failure strain in linepipe Part 1
Category: Technical papers from the Journal of Pipeline Integrity
Downloadable: Yes 
Catalog No.: 2054
Date of Publication: Quarter 2 2004
Price: $25.00 US
Authors: Micheal Law, Graham Bowie, Leigh Fletcher, and John Piper
Abstract: This work compares the results of ring-expansion (RE) and tangential-tensile (TT) testing. A model is developed which clarifies the relation between these test results. A pipe was sectioned into a number of TT specimens around the circumference and the results from this testing compared to the yield strength (YS) calculated from RE testing of the same pipe. The TT values varied around the pipe, and the RE value was lower than the average for the TT testing. The results of modeling shows that the lower-strength material will strain first, and thus the composite YS will be dominated by the YS of the lower-strength material. The results from RE testing are less variable than those from FT or TT tests. The YS gained from RE testing will provide the best prediction of hydrotest strain behavior. However, as it overestimates the yield strength at the weakest position in a pipe, it overestimates the failure pressure.
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