The control activities are planned since the early phase of the project, in collaboration between project engineering and quality control functions.

For each project it is carried out, besides the normal control activities, a general process verification of safety and construction aspects, which is made before the construction activities.

Where foreseen, it is carried out a general safety and functional verification with HAZOP methodology, together with the client and/or other parties involved in the project.

The plant is completely pre-assembled in workshop, and submitted to rigorous leak tests. Where possible (for units with lower sizes) the complete functional tests are carried out.

The control systems are completely checked with simulation of process signals (hardware and software).

In commissioning phase the final verifications are carried out before the plant start-up, including the qualifiaction of mechanical installation and connections, the check of calibration and functionality of the loops, the verification of utilities and compatibility with external circuits. In such way it is further verified, from functional and safety point of view, the integration of the plant in the customer existing systems.