This standard recommended practice 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. There is a recognized need for such a standard in order to achieve long-term durability in such applications. The standard is based on applications of organic linings 500 µm (20 mils) or less. Its concepts can be employed in the application of thicker linings but the specified procedures may be modified or not required. This recommended practice is 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.

This joint standard was prepared by the NACE/SSPC Task Group 246 on Thin-Film Organic Linings Applied in Process Vessels and Tankage. This task group is administered by NACE Specific Technology Group (STG) 03 on Protective Coatings and Linings - Immersion/Buried. It is also sponsored by STG 02 on Protective Coatings and Linings-Atmospheric, STG 04 on Protective Coatings and Linings - Surface Preparation, STG 34 on Petroleum Refining and Gas Processing, and STG 43 on Land Transportation. This standard is published by NACE under the auspices of STG 03, and by SSPC.