Application of Elastomeric Insulation for Attenuating Compressor Piping Noise - A Design Study for Offshore Installations

Compressor piping is a major noise source in offshore installations with large centrifugal and screw compressors. However, current offshore noise studies and noise control designs often overlook the importance of this source and do not model this important noise source category in sufficient detail to optimize the mitigation measures. Acoustic insulation is used on compressor suction, discharge and recycle lines to attenuate noise generated at the compressor and propagating through the compressor piping. The current study introduces an in-depth modeling procedure accounting for distance attenuation and branch losses. The study demonstrates that eliminating acoustic insulation on branch lines result in a manageable impact on the overall noise restricted areas on the platform. The paper will also discuss how elastomeric insulation provides weight and layout benefits, compared to traditional mineral wool and metal cladding insulation systems (ISO 15665), while providing the additional benefit of eliminating corrosion under insulation (CUI).