For a thermal treatment process of metals in the manufacture of helicopters, a specific methanol dosage is required at several points of use in the furnaces. The pressure and flow conditions must remain stable. This type of industrial systems using methanol to their operation are characterized by their constant, uninterrupted operation (24 x 7) without breaks for maintenance tasks. The methanol pumping units are designed with components to comply with the highest safety and reliability requirements, with a redundancy system to avoid single failure points. That redundancy system is managed by a control panel that requires a follow-up of the status of the components and their automatic commutation in case of failure. The control panel can be managed remotely with BMS systems. Therefore, the design given to the consulting engineers and subcontractors had to focus on improved system diagrams for critically important installations.