Over time, oxygen has been used with increasing frequency in the steel industry. Applications include basic oxygen furnaces, electric arc furnaces, scrap melting, lancing operations, and slab-cutting operations. Because of the inherently “dirty” environment of most steel mills, avoiding contaminants in the oxygen systems can be challenging and numerous fires have occurred due to contaminant-promoted ignition sources. This paper presents many good practices that can be practically implemented to reduce the risk of oxygen fires in typical steel mill oxygen system installations.