September 2019, Vol. 246, No. 9
Features
Testing Program Validates Wrinkle Bend Repair Solution
Wrinkle bends are ubiquitous in the United States, and many exist in lines that have been in service for decades. Continuous service and wear take their toll over time, but on wrinkle bends, which experience high strains resulting from bending and axial forces caused by shifting terrain and suffer in many cases from insufficient pipe support, there is concern about their continuing integrity. In many cases, repairs will be essential to ensure safe operations, and owners want reliable options to the very costly practice of cutting and replacing the bend areas with new pipe. Then, Now Until the mid-1950s, bending pipe was a common way to bring pipelines into alignment. Bending techniques u
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