This recommended practice provides guidance on achieving effective corrosion control in aboveground storage tanks by application of tank bottom linings. It contains information pertinent to the selection of lining materials@ surface preparation@ lining application@ cure@ and inspection of tank bottom linings for existing and new storage tanks. In many cases@ tank bottom linings have proven to be an effective method of preventing internal corrosion of steel tank bottoms. The intent of this recommended practice is to provide information and guidance specific to aboveground steel storage tanks in hydrocarbon service. Certain practices recommended herein may also be applicable to tanks in other services. This recommended practice is intended to serve only as a guide. Detailed tank bottom lining specifications are not included. This recommended practice does not designate specific tank bottom linings for every situation because of the wide variety of service environments. NACE No.10/SSPC-PA 6 and NACE No. 11/SSPC-PA 8 are industry consensus standards for installation of linings on tank floors and vessels. They are written in compulsory language and contain specific criteria intended for use by persons who provide written specifications for tank and vessel linings. These documents should be given consideration when designing and installing a lining system for steel bottom tanks.