Pipe Insulation
Rockwool Pipe sections and Rockwool Marine Wired Mats offer excellent noise reduction towards fluid noise in process piping. Especially compared to closed cell insulation, glass foam and similar. Mounting of pipes in flexible fitting is necessary to avoid structure transmitted noise.
Fluid noise is often of high frequency when insulating pipes for noise, the best results will occur when finished with a cladding system. This is traditionally made with steel cladding, but other systems like RockTight is equally good. It is important that it is ridged but not connected to the pipes, even if distance
rings are used.
Insulating around valves is also important as much fluid noise is generated here. Encapsulation boxes are the best choice, but more sophisticated prefabricated mats (as often seen offshore) with Rockwool infill and multi layer covering will perform very well for noise reduction.
Test examples:
