Leaching involves the use of aqueous solutions to extract metal ore from metal bearing materials. There are several leaching methods used including In-situ, Heap, Vat, Tank & Autoclave. All these processes deliver aqueous solutions driven by pumps. At various stages of the leaching process, over-pressure protection to maintain integrity of the system, as well as protect pumps, valves and process monitoring equipment is essential. In addition, autoclave reactors operate at higher temperature and use gaseous reagents. ZOOK rupture disks provide vital pressure-relief.