Specifies procedures to design, install, and inspect thin-film organic linings applied to new carbon steel process vessels to prevent corrosion and other forms of degradation, such as hydrogen-induced cracking, or to prevent product contamination. It is also useful for lining applications in existing process vessels and equipment. Based on applications of organic linings 500 μm (20 mil) or less. Useful for lining vessels in many industries including, but not limited to, refining, chemical, water-treating, and food. The intended users are owners, contractors, inspectors, applicators, vessel designers, protective coatings specialists, and others concerned with the lining of process vessels. Key words: protective linings, vessels.