Many different large component industries develop structural integrity methodologies independently of each other even though the guiding principles of fracture mechanics and flaw tolerance concepts are followed. This paper presents a comparison of some key aspects of flaw tolerance approaches used in the petroleum and nuclear power industries. Differences in the types of components and structures are acknowledged as well as material degradation and failure mechanisms. Potential transfer of structural integrity technology for some aspects of the methodologies will be presented and discussed. The hope is that some cross-fertilization between the industries can be developed and maintained.

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