ABSTRACT

Considering the future development for offshore pipelines, moving towards difficult operating condition and deep/ultra-deep water applications there is a need to understand the failure mechanisms and better quantify the strength and deformation capacity of corroded pipelines considering the relevant failure modes (collapse, local buckling under internal and external pressure, fracture / plastic collapse etc.).

A Joint Industry Project sponsored by ENI E&P and Statoil has been launched with the objective to quantify and assess the strength and deformation capacity of corroded pipes in presence of internal overpressure.

In this paper:

  • The full-scale laboratory tests on corroded pipes under bending moment dominated load conditions, performed at C-FER facilities, are discussed;

  • The results of the ABAQUS FEM analyses aiming to predict the laboratory test results are presented.

Keywords:
laboratory test, steel axial force, riser corrosion, laboratory test result, average curvature, flowline corrosion, materials and corrosion, full-scale laboratory test, fem analysis, pipe specimen
Subjects:
Pipelines, Flowlines and Risers, Materials and corrosion
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2013. International Society of Offshore and Polar Engineers
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