Exhaust air containing components of solvents may not be emitted into the atmosphere without going through a post treatment system. Two factors play an important role here: the regulatory limits to be complied with and the prevention of unpleasant odours. The piping system connects the components of the post treatment facility. Due to the different ranges in temperatures, expansion joints, and fixed and floating bearings must be built in so that the facility can be connected to the steel base frame free of tension.