Local areas of deformation (wrinkles and dents) have been recognized as one of the leading causes of failures in both gas and liquid pipelines.This research had four objectives: (1) update the industry survey of GRI Project 8756 on SCC at deformations, (2) demonstrate that a crack mouth monitoring technique can be used on full-scale pipe samples with dents to study the mechanical component of near-neutral-pH stress corrosion growth, (3) evaluate the effect of dents on the SCC crack growth rate (CGR), as compared with pipe base metal, and (4) investigate whether hydrotesting can be used as an effective...
Local areas of deformation (wrinkles and dents) have been recognized as one of the leading causes of failures in both gas and liquid pipelines.This research had four objectives: (1) update the industry survey of GRI Project 8756 on SCC at deformations, (2) demonstrate that a crack mouth monitoring technique can be used on full-scale pipe samples with dents to study the mechanical component of near-neutral-pH stress corrosion growth, (3) evaluate the effect of dents on the SCC crack growth rate (CGR), as compared with pipe base metal, and (4) investigate whether hydrotesting can be used as an effective means of mitigation of SCC at dents, i.e., slow down the CGR.