Evaluating the Failure Pressure of Corroded Pipeline

This paper presented a review on ASME B31G, DNV RP-F101 and PCORRC methods in evaluating the remaining strength of corroded pipeline. These methods are validated by 67 sets of data about full-scale burst test of pipe with a defect. A numerical model for predicting the burst failure of corroded pipeline was constructed using the non-linear finite element method. Using this model, the full-size pipe burst experiments of pipelines in different material, size and defect was analyzed and computed. The proposed FEM model was validated. Based on the calculation result using the model, a new formula predicting failure pressure was presented, in which depth, length and width of a defect was involved. Comparison of the formula with the other assessment method and experiments showed the formula had a satisfactory precision.