(height approximately 35 m, area approximately 1500 m2) around a Heat Recovery Steam Generator (HRSG) in a high capacity gas-fired power plant.

I would like to take this opportunity to thank you and your team for your active contribution in meeting this important milestone… We all can be proud of our collaboration, and the constructive spirit inspired between the teams to face all challenges during the erection.
C.B. Subcontracting Manager (Nord-Pas-de-Calais region, France)


The construction of a large sized noise barrier wall is required when it comes to limiting the environmental noise impact of noise sources as large as a Heat Recovery Steam Generator (HRSG) of which hundreds of m2 of walls are subjected to major vibro-acoustic sollicitations, with respect to which their capacity to limit the sound transmission is insufficient.

The implementation of an acoustic screen based on metal acoustic insulation panels with an absorbing face (noise source side) makes it possible to limit the spread of noise towards residents who could otherwise be disturbed, even at great distances a fortiori in the case of an uninterrupted installation (this is the case of a power plant), especially during the night.

The application of the regulations in force, based on the emergence criterion i.e. the difference between the A-weighted equivalent continuous pressure levels of the ambient noise (instalation in operation) and the residual noise (in the absence of the noise generated by the installation, but measured over the period of operation of the installation) imposes a specific soundproofing action.

The presence of many singularities (structural elements for support of ancillary equipment, pipes, ducts) makes it necessary a careful study allowing the prefabrication of sub-assemblies of metal construction whose installation (with specific lifting means: crane and lfting plaforms) will be facilitated neither by the height of the construction nor by the co-activities with other fitting companies, in the case of the construction of a thermal power station.

The construction of a large sized noise barrier wall is a project whose technical and organizational challenges are major and require the expertise of business partners such as those that ITS can find.