It is common to assess corroded line pipe using ASME B31-G, its Canadian equivalent CSA Z662 Clause 10.8.2, or more recently RSTRENG. These techniques consider only the circumferential stress in the pipe in predicting the burst pressure of corroded pipe. This paper describes the results of experiments and finite element modeling to investigate the effect of longitudinal stress on the burst pressure of pipe with isolated corrosion pits. The results are used to develop a correction factor applicable to the assessment procedures listed above.

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