Structural evaluation of corrosion defects in pipelines: Comparison of FE analyses and assessment methods

A modified version of the RSTRENG 085dL method was proposed in a previous paper. This method, named RPA method or Modified 085dL method, uses two different equations to predict the failure pressure of a corrosion defect. The equation for short defects is the same equation used by the original 08.5dL method in the assessment of short defects. However the equation for long defects is different from the equation used by the original 085dL method in the assessment of long defects and gives conservative results for long uniform depth defects. In this paper the failure pressures of several long uniform depth defects predicted by a shell finite element model are compared with those predicted by the RPA method, the ASME B31G method, the RSTRENG 085dL method and the DNV RP-F101 method for single defects (Part B).