Assessment of the Environmental Effects on the Performance of FRP Repaired Steel Pipe

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Assessment of the Environmental Effects on the Performance of FRP Repaired Steel Pipes Subjected to Internal Pressure

Author: Ramadan A. Esmaeel, Mohamed A. Khan and Farid Taheri | Size: 1 MB | Format: PDF | Quality: Unspecified | Publisher: ASME | Year: 2011 | pages: 7

The use of composite materials for repair and rehabilitation of corroded steel pipes has
been increasingly growing in the oil and gas industry. However, there exists a noticeable
gap in the literature on the long term performance of composite repaired pipes, especially
those subjected to large internal pressure magnitudes. This work is an attempt toward
filing the gap by gaining a better understanding of the effects of environmental
conditions on the long term performance of composite repaired pipes subjected to large
internal pressures. Finite element method (FEM) is used to simulate typical composite
warp-repaired gouged steel pipes, conditioned in various environments and subsequently
subjected to internal pressure. The influence of the resulting degradation in composite’s
mechanical properties on the performance of the system was evaluated. To validate the
results, an experimental program was designed and carried out. Repaired specimens
were conditioned in an environmental chamber under certain thermal and moisture conditions;
then, the specimens were tested to failure subject to internal pressure. Good correlation
was obtained after fine tuning of FEM model’s material data through the use of
the experimentally obtained data.

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