Top-of-Line Corrosion Control in Large Diameter Wet Gas Pipelines

Abstract

TX 75083-3836, U.S.A., fax +1-972-952-9435. AbstractLarge diameter subsea pipelines are being used across the world for wet gas transportation over significant distances from offshore fields to onshore facilities. The ability to predict and control corrosion is necessary to ensure long term integrity of these pipelines. Large diameter wet gas lines operating in stratified flow pose unique challenges for top of the line corrosion which occurs when corrosive gases are found dissolved in condensed water at the top of the pipe. This paper will discuss a study undertaken by ExxonMobil 1 and RasGas to establish a mechanistic understanding of sour top of the line corrosion and the operational guidelines developed to control its occurrence.