This project assessed the modeling error of current Level 1 corrosion criteria of ASME B31G and Modified B31G by quantifying the role of the shape factor (SF) and the bulging factor (BF) as causes for large scatter of failure predictions. The goal was to minimize the error and to reduce the conservatism in those corrosion assessment models and potentially reduce unwarranted maintenance efforts without increasing operator risk.
Extensive elastic-plastic finite element analyses (FEA) were performed on corroded pipes in three-dimensional conditions for a wide range of corrosion defect shapes and...
Extensive elastic-plastic finite element analyses (FEA) were performed on corroded pipes in three-dimensional conditions for a wide range of corrosion defect shapes and sizes, pipe geometries, grades, and material properties.
The FEA results were trended as the basis to reformulate a new corrosion criterion.