Abstract
Application of Fracture Mechanics Parameters to Spherical Storage Tank Integrity Assessment
Highlights
INTRODUCTIONMore cracks were found after repair welding than before, because of material, but even more important, due to unnecessary overpressurizing during testing, [5, 6]
The spherical storage tank for ammonia, made of high strength low alloyed steel A36.52 (NIOVAL 47), was tested recently using non-destructive techniques (NDT)
The stress intensity factors were analytically determined, and compared with the fracture toughness to find out the critical pressure using Failure Assessment Diagram (FAD) in combination with net stress vs. critical stress
Summary
More cracks were found after repair welding than before, because of material, but even more important, due to unnecessary overpressurizing during testing, [5, 6]. Another strategy was used here, based on structural integrity assessment, enabling simple treatment/removal of cracks with a profile milling cutter. Toward this end, the stress intensity factors for detected cracks were calculated and compared with the fracture toughness to assess spherical storage tank structural integrity. Aleksandar MILOVANOVIĆ et al.: Application of Fracture Mechanics Parameters to Spherical Storage Tank Integrity Assessment
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