Stainless steels have been widely used in various fields due to their good corrosion resistance and mechanical properties. Although the corrosion resistance of stainless steels is better than those of other metals, it could corrode under some specific conditions. Causes of corrosion for stainless steel tubing systems used in gas and aqueous environments were studied. Based on the investigations, several suggestions were made in regard to corrosion prevention in corrosive environments in the aspects of design, fabrication, and maintenance of the tubing systems.