The Requirement of Internal Corrosion Barriers in Low Pressure Grid Pipelines

Abstract Corrosion management is a critical component of pipeline integrity, aimed at preventing or mitigating the degradation of pipeline materials. The scope of the study is to conduct a corrosivity study and confirm corrosion management strategy of several pipelines that are part of Low Pressure (LP) gas grid that export excess wet gas from several production stations to a compression station. The study support assessment of pipelines with lack of design document that state the internal barriers and considers criticality of these pipelines along with its historical legacy. It was required to define the requirement of internal corrosion barriers by taken into consideration the pipeline service, corrosion prediction and assessment, along with available inspection data for several pipelines. The method of this study is to carry in depth assessment to all aspects of corrosion modeling, corrosion monitoring, corrosion inspection, as process modeling. A review of internal corrosion and degradation threats to grid system pipelines may be contingent upon including humidity and corrosivity prediction modeling (LarktonTM CO2 and Hydrocor) using current process conditions. Furthermore, a thorough review of the available NDT data and the available In-Line Inspection data (where applicable), available intrusive corrosion monitoring device data, and current cleaning pigging frequencies.