(402t) Corrosion Rate Estimate in Natural Gas Pipelines By Aspen Hysys

Corrosion is a degradation of the metal caused due to electrochemical reactions to the environment. Type of metal, the nature of the fluid and ambient conditions affects the extent of the corrosion to a variable degree and extent. In order to safeguard the pipeline and process, an accurate corrosion estimate is needed. In lieu of this relevance, corrosion studies of natural gas pipelines have been of great importance due to their dominant usage in transportation of hydrocarbons, especially natural gas.

The associate and non-associated natural gas have variable amounts of acid gases such as CO2, H2S, water and other. The presence of these impurities enhances the corrosion rate in the pipeline and leads to pipeline decay and leaks.

In this study Aspen Hysys is used as a tool to model metallic corrosion in the pipelines in a NG transportation pipeline. This study investigates the influence of a few process parameters such as temperature, pressure, flow rate, and pH on the corrosion during natural gas processing and transportation process. The assumption and corrosion model available in Aspen Hysys pipeline corrosion metho in the estimation and prediction is examined. Aspen HYSYS software is utilized due to its stability and ease of calculation. The corrosion rate and safe life span of the pipeline is estimated. A summary of the results is included in this study.