Development of detailed engineering for piping systems (aboveground and underground) and related civil and structural works, utilizing steady-state and dynamic simulations. We develop Process Flow Diagrams (PFD) and P&IDs with complete management of mass and energy balances. Our approach integrates process hazard analysis (HAZOP/HAZID) from the early project stages, minimizing operational risks and ensuring compliance with ATEX standards and the SEVESO III Directive.