<![CDATA[Pressure vessels are critical components in Liquefied Natural Gas (LNG) facilities that are susceptible to failure during the commissioning phase due to extreme operational loads. This study aims to identify the failure mechanism and location, as well as to evaluate the operational feasibility of an electrical Pressure Vessel made of Q345R steel. The analysis was conducted using a numerical computational approach, Finite Element Analysis (FEA), via ANSYS software, integrating Steady State Thermal and Static Structural modules. The simulation boundary conditions were based on maximum operational parameters: an internal pressure of 4.73 MPa, an internal temperature of 270 °C, and an ambient temperature of 25 °C. The computational results revealed plastic deformation with a maximum displacement of 4.123 mm located at the right head area of the vessel. Furthermore, a highly concentrated Von Mises stress reaching 903.78 MPa was observed at the fixed support area, which significantly exceeded the material's yield strength of 345 MPa. According to the Fitness-For-Service standard (API 579-1/ASME FFS-1), the Pressure Vessel was declared unfit for service. As a technical mitigation measure grounded in Occupational Health and Safety (OHS) principles and engineering ethics, a partial repair is highly recommended. This includes replacing the permanently damaged head component and modifying the support by thickening the saddle pad to prevent potential catastrophic failures and maintain the sustainability of the LNG facility.]]>
