Due to its availability and low cost, carbon steel has been used for decades to build storage tanks. The main applications were petrochemical industry, food industry, water treatment units and parachemical industry. Nevertheless, as this material is readily oxydable even in the atmosphere, painting and coating are often to be applied to protect it. For the time being, the use of coated carbon steel remains a routine practice, but detailed analysis of capital investment cost as well as life cycle cost demonstrate that stainless steels are cost-competitive. Among these materials, duplex grades, thanks to their higher mechanical properties, appear to be less expensive than coated carbon steel. The paper presents an extensive and detailed analysis of the manufacturing and maintenance costs for storage tanks made of various materials including several carbon steel grades and stainless steels either austenitics and superaustenitics or duplexes and superduplexes. A friendly software has been developed which permits to calculate and compare automatically investment and life cycle costs of tanks made of different materials. The simulation is based upon API (USA) and CODRES (French) calculation codes; moreover, tailor-made simulations may also be achieved. (VDEh)
Life cycle cost evaluation of carbon steels, austenitic and duplex stainless steels for storage tanks
Bewertung der Lebensdauerkosten von unlegierten Stählen, austenitischen nichtrostenden Stählen und nichtrostenden Duplexstählen für Lagerbehälter
2000
8 Seiten, 3 Bilder, 3 Tabellen, 2 Quellen
Aufsatz (Konferenz)
Englisch
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