The project provides for the upgrade of three (3) sales gas compressors at UGP and three (3) sales gas compressors at ShGP, and the associated Civil (foundations), Structural (steel carpenter), Piping (lube oil), Mechanical (gearbox, couplings, shaft, valves), Electrical and Instrumentation/Control installations (switchrack, current transformer, breaker, relay, PD trac, ESD, DCS) to be executed during consequential partial Shut Down on each train.