The Paton Welding Journal, 2022, №06



2022 №06 (03)

DOI of Article 10.37434/tpwj2022.06.04

2022 №06 (05)

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The Paton Welding Journal, 2022, #6, 22-28 pages

Evaluation of load bearing capacity of cylindrical shell of above-ground vertical steel welded tank for oil storage after repair

A. Barvinko, Y. Barvinko, A. Yashnik, O. Kostenevich

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Abstract
When above-ground steel tanks are repaired, certain improper techniques used during welding of individual sheets into the tank shell may cause depressions to form in the shell surface. Such deviations in the shell shape from the design geometry create additional stresses. In this study basing on result of computer calculation of tank with D = 22.8 m and H = 12.0 m it is proposed that if the shell imperfection is a rectangular depression of a near-cylindrical design geometry, it is possible to increase the allowable stresses by 10 % by introducing a specific coefficient taking into consideration the effect of additional stresses.
Keywords: vertical cylindrical above-ground tank, stressed state, rectangular depression, local shell deformation, welding, repair

Received: 25.05.2022
Accepted: 15.08.2022

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