The company Innospec Leuna GmbH performed a project to replace the existing tubular reactor of its EVA plant in Leuna. Due to massive corrosion issues a changeover from carbon to stainless-steel tubes has been required. An originally simple replacement issue has turned into a major project including the erection of a new reactor bay, the installation of a blow down vessel and the new gas feed and discharge pipes. A further challenge was the consideration of ongoing bracket failures as well as subsequent gas leaks at the old tubular reactor and to avoid such failures. Together with Dr. Jansen – Vibration and Pulsation Consulting a metrological validation of the dynamic behaviour of the new reactor components was initiated. The goal of this investigation was the identification of potentially excessive operational vibration levels for the equipment before the first run. A series of forced response tests has been performed shortly after the erection of the new reactor stacks. On the basis of the Study of Pulsation for this plant and the results of the forced response tests potential resonance cases have been identified. A metrological validation of the effectivity of the measures was performed during the commissioning of the new reactor.