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Vol.18, No.1, 2018, pp.45–51 |
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IMPACT OF AUSTENITIC STEELS’ MECHANICAL PROPERTIES ON ALLOWED STRESS AND WALL THICKNESS OF PRESSURE EQUIPMENT Sanja Petronić1, Aurel-Valentin Birdeanu2, Radomir Jovičić3, Katarina Čolić3, Dragan Vašalić1, Olivera Erić-Cekić3 1)University of Belgrade, Vinča Institute of Nuclear Sciences, sanjapetronic@yahoo.com 2)National R&D Institute for Welding and Material Testing - ISIM Timişoara, Romania 3)University of Belgrade, Innovation Centre of the Faculty of Mechanical Engineering, Belgrade, Serbia |
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Abstract The Pressure Equipment Directive (PED) and Regulations on Technical Requirements for Designing, Manufacturing and Conformity Assessment of Pressure Equipment bring a number of changes to the design of pressure equipment in relation to the Technical Regulations for Stable Pressure Vessels, 1983. Among the most important changes are the essential safety requirements for pressure equipment. The changes in the formula, for all materials, for calculating the allowable stresses, as well as the change in the value of the test pressure, the new Regulations use the 1.0% proof strength as the relevant value for calculating the permissible membrane stress and thickness of pressure equipment walls. In this paper, the differences in the allowable stresses, the required wall thicknesses, and the approximate savings in the material in the case of a milk reservoir, calculated according to the requirements of the Directive and the new Regulations on one hand, and the old Regulations on the other, are presented. Keywords: pressure equipment, maximum allowable stresses, austenitic steels, technical design requirements, tensile strength, yield strength |
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full article (1984 KB)
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