NYSEARCH's Cased Pipe Corrosion Rate Estimation Program

摘要

Currently, gas operators with pipelines in High Consequence Areas (HCAs) are struggling with how to best respond to pipeline integrity inspection requirements where the carrier pipe passes through a casing. The annular space of a cased pipe represents a unique engineering environment. Operators need information that leads to a scientifically valid method of estimating corrosion rates in such environments to facilitate the risk assessment specific to cased pipe sections. Without cutting-edge tools and tech- nologies that give accurate cased pipe information, costly excavations that significantly disrupt the public's infrastructure cannot be avoided. Essentially, a better understanding of the conditions and mechanisms that cause external corrosion on a cased carrier pipe, including atmospheric corrosion, is required.