Pressure vessels have been used for a long time in various applications in oil, chemical, nuclear, and power industries. Although high-strength steels have been available in the last three decades, there are still some provisions in design codes that preclude a full exploitation of its properties. This was recognized by the European Equipment Industry and an initiative to improve economy and safe use of high-strength steels in the pressure vessel design was expressed in the evaluation report (Szusdziara, S., and McAllista, S., EPERC Report No. (97)005, Nov. 11, 1997). Duplex stainless steel (DSS) has a mixed structure which consists of ferrite and austenite stainless steels, with austenite between 40% and 60%. The current version of the European standard for unfired pressure vessels EN 13445:2002 contains an innovative design procedure based on Finite Element Analysis (FEA), called Design by Analysis-Direct Route (DBA-DR). According to EN 13445:2002 duplex stainless steels should be designed as a ferritic stainless steels. Such statement seems to penalize the DSS grades for the use in unfired pressure vessels (Bocquet, P., and Hukelmann, F., 2001, EPERC Bulletin, No. 5). The aim of this paper is to present an investigation performed by Luleå University of Technology within the ECOPRESS project (2000-2003) (http://www.ecopress.org), indicating possibilities towards economic design of pressure vessels made of the EN 1.4462, designation according to the European standard EN 10088-1 Stainless steels. The results show that FEA with von Mises yield criterion and isotropic hardening describe the material behaviour with a good agreement compared to tests and that 5% principal strain limit is too low and 12% is more appropriate.
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February 2007
Research Papers
Use of Duplex Stainless Steel in Economic Design of a Pressure Vessel
Milan Veljkovic,
Milan Veljkovic
Luleå University of Technology
, Sweden
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Jonas Gozzi
Jonas Gozzi
Luleå University of Technology
, Sweden
Search for other works by this author on:
Milan Veljkovic
Luleå University of Technology
, Sweden
Jonas Gozzi
Luleå University of Technology
, SwedenJ. Pressure Vessel Technol. Feb 2007, 129(1): 155-161 (7 pages)
Published Online: May 10, 2006
Article history
Received:
December 22, 2005
Revised:
May 10, 2006
Citation
Veljkovic, M., and Gozzi, J. (May 10, 2006). "Use of Duplex Stainless Steel in Economic Design of a Pressure Vessel." ASME. J. Pressure Vessel Technol. February 2007; 129(1): 155–161. https://doi.org/10.1115/1.2389034
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