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This paper will provide recent corrosion data for stored chemicals. Duplex stainless steel corrosion curves obtained in nitric, sulfuric, phosphoric acids as well as several kinds of waters will be provided. In addition, atmospheric corrosion data obtained after 15+ years of sample exposures in several geographic areas will be shown. These results will be compared to those obtained with other materials commonly used for the construction of storage tanks.
This paper is dedicated to material selection and Life Cycle Cost (LCC) of storage tanks. There are many materials options for the construction of storage tanks among which are coated carbon steels, austenitic stainless steels and duplex stainless steels. Material choice requires the designer to consider several features: material performance, material cost and availability, weight and strength aspects, fabrication and maintenance costs. All are important factors in determining the lowest project and life cycle cost. Duplex stainless steels are more often considered for storage tanks projects today due to their good corrosion resistance in many environments and their higher mechanical properties.
The tank painting process for the interior of a petroleum and/or water storage tank requires proper coating selection, product application and inspection in order to achieve long-term service life. The primary cause of early coating failures in a painting project is often related to an application issue. The use of coating systems and linings formulated with Optically Active Pigments (OAP) can help to ensure correct application and inspection of the tank linings.
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The above ground storage tanks in the refinery are experiencing bottom plate underside (soil) corrosion at a high rate of 1mm/year. Results: Failure of 4 tanks within a period of 9 years. Observations, details of the CP survey, tests, results and forward path taken up.
This paper addresses the challenges to provide example of engineering solutions through the use of corrosion resistant alloys and non metallic materials to maintain the integrity of flowlines and process equipment in severe sour service.