September 2020, Vol. 247, No. 9

Features

When Pipelines Strain Assessment Exceeds Capacity

By J. Dawson, I. Yablonskikh and M. El Seify, Baker Hughes The as-laid position of pipelines is not always constant, and movement can occur for several reasons, including settlement, wash-out and flooding, subsidence, landslides, earthquakes and human activity adjacent to the line.  Pipeline movement or deformation redistributes the axial force along the pipe, increasing axial tension in some locations and compression in others.  It can also give rise to pipeline curvature, which induces tensile-bending strain in half of the pipe cross section and compressive bending strain in the other half. The tensile strain can lead to pipeline leak or ruptur

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