The Scanacon Acid Circulation System (ACS) is a custom engineered turbulent pickling / etching system for retrofitting existing process tanks or for new process tank installations. Using a proprietary nozzle and manifold design, Scanacon is able to circulate the process tank up to 30 tank volumes per hour, without increasing evaporate loss or acidic gas (NOx / SOx) emissions, and, importantly very cost effectively without unnecessarily large pumps and process piping.