Use of an Internal Corrosion Threat Assessment to Identify Locations to Conduct an Integrity Assessment

Federal regulations require that pipelines for which the threat of internal corrosion exists be assessed by ILI, hydrostatic testing, ICDA or another method to assure their integrity. Removing the threat of internal corrosion can be justified if sufficient historical data on gas quality, monitoring, and/or inspection exists. A need therefore exists for a defensible and systematic process by which the internal corrosion threat can be determined. This paper describes a standard approach to organize, integrate and analyze data to identify whether internal corrosion is a threat for a given pipeline segment. A case study of the implementation of the approach is also provided.