This case study reviews an AngloGold Ashanti project which facilitated a saving of 2.5 MW by using Flownex® to optimise compressor and piping systems. The project also won Jean Greyling of AngloGold Ashanti an eta (energy efficiency) award. Jean Greyling, a registered certified energy manager (CEM) holds both a master’s degree in mechanical engineering from the North-West University and a government certificate of competency (GCC) for mines and works.