Lining techniques, procedures, and materials vary depending upon operating conditions. The power industry, for example, uses wallpapering, usually with a minimum 1.S7-mm (0.062-inch) thick high nickel alloy, to protect flue gas desulfurization (FGD) equipment. Other industries, such as pulp and paper manufacturing or chemical processing, often use sheet lining with UN8 830403 or 831603 (Type 304L or 316L), or other grades of stainless steel. This publication focuses on these materials.