The Fitness-For-Service (FFS) assessment procedure based on stress analysis provides the most detailed evaluation which produces results that are more accurate than the other procedures using screening criteria or assessment diagram. In Japan, the concern with the detailed evaluation of metal loss has been growing. For the actual application, it is necessary to clear the safety margin of FFS assessment results using stress analysis. There has, however, been little study to compare between actual burst pressure of cylindrical shell with metal loss and the FFS assessment results using finite element method (FEM) . <br>In this study, the allowable pressure limits against local failure for a cylindrical shell with local metal loss were evaluated using FEM, and compared with actual burst test results. Additionally, individual variation of the FEM results was evaluated in the FFS standard committee, which consists of the Petroleum Association of Japan and the Japan Petrochemical Industry Association. Finally, the detailed FEM procedure including how to select element types for accurate assessment was proposed. <br>By using the proposed procedure, the allowable pressure limits for local collapse calculated by the committee members varied within 5% of the safety margin.
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