Vol.3, No2, 2003, pp. 93-98
UDC 620.169.1:621.642

INTEGRITY ASSESSMENT OF SPHERICAL STORAGE TANK

Gorgi Adžiev 1

Aleksandar Sedmak 2

Faculty of Mechanical Engineering, University of Skopje, FYR Macedonia

Faculty of Mechanical Engineering, University of Belgrade, Srbia and Montenegro

Abstract

Integrity of spherical storage tanks for ammonia (volume 1000 m3, diameter 12400 mm, wall thickness 30 mm) has been analysed because cracks have been found along fusion line, of length up to 300 mm and variable depth. By J integral direct measurement J-R curves have been obtained for two positions of crack (fine grain and coarse grain HAZ). These curves are plotted against crack driving forces, analytically obtained, for the estimation of critical pressure.

Ključne reči: structural integrity, spherical storage tank, weldment mismatching, J integral

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