The oldest system we have worked on was a hydroelectric plant built in the 1920s. As part of a refurbishment, the client needed control system pipework flushed. These pipes carried oil to the governors and bearing on the turbine. Using high-velocity flushing and offline filtration, Fleury Engineering was able to clean the pipework and return it to use onsite. The project timescale was minimised by using online monitoring equipment. This ensured that once the internals of the pipes were clean enough, the flushing could stop.