API Recommended Practice 652 - American Petroleum …

1 API Recommended Practice 652 Linings of aboveground Petroleum storage Tank Bottoms FOURTH EDITION | SEPTEMBER 2014 | 24 PAGES|$ | PRODUCTNO. C65204 This Recommended Practice (RP) 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 RP is to provide information and guidance specific to aboveground steel storage tanks in hydrocarbon service.

2 Certain practices Recommended herein may also be applicable to tanks in other services. This RP is intended to serve only as a guide. Detailed tank bottom lining specifications are not included. This RP does not designate specific tank bottom linings for every situation because of the wide variety of service environments. For ordering information: Online: Phone: 1-800-854-7179 (Toll-free in the and Canada) (+1) 303-397-7056 (Local and International) Fax: (+1) 303-397-2740 API members receive a 30% discount where applicable. ContentsPage1 Scope .. 12 Normative References.

3 Codes, Standards, and Specifications .. Other References.. 33 Terms and Definitions.. 44 Corrosion Mechanisms.. General .. Chemical Corrosion .. Concentration Cell Corrosion .. Galvanic Cell Corrosion .. Microbiologically Influenced Corrosion (MIC) .. Erosion-Corrosion .. Fretting-Related Corrosion.. 95 Determination of the Need for Tank bottom lining .. General .. Linings for Corrosion Prevention .. Tank Corrosion History.. Tank Foundation .. 106 Tank bottom lining Selection .. General .. Thin-film Tank bottom Linings.. Thick-film, Unreinforced Linings.

4 Thick-film Reinforced Linings .. Circumstances Affecting lining Selection .. 147 Surface Preparation.. General .. Pre-cleaning .. bottom Repair and Weld Preparation .. Surface Cleanliness .. Surface Profile or Anchor Pattern .. Air and Abrasive Cleanliness.. Removal of Salts .. Removal of Dust .. 178 lining Application.. General .. Guidelines for lining Application .. Temperature and Humidity Control .. lining Thickness .. lining Curing .. 18vContentsPage9 Inspection.. General .. Qualification of Inspection Personnel .. Recommended Inspection Parameters.

5 1910 Evaluation and Repair of Existing Linings.. General .. Evaluation Methods.. Evaluation Criteria for Linings .. Evaluating Serviceability of Existing Linings.. Determining the Cause of lining Degradation/Failure .. lining Repair and Replacement.. 2111 Maximizing lining Service Life by Proper Material Selection and Specification.. General .. lining Material Selection .. Written Specification .. 2312 Health, Safety, and Environmental .. General .. Tank Entry .. Surface Preparation and lining Application .. Manufacturer s Material Safety Data Sheets .. 24