Decoking/Descaling – The continuous build-up of coke on the inner walls of fired heaters and heat exchange surfaces in oil refineries leads to reduced energy efficiency and shutdown of the affected unit. To clean the walls, a device called a pig is sent through the pipeline with high pressure water. The water that forces the pig through the pipeline is the CMU Series Pump. The CMU pump is the only centrifugal pump in the industry that can withstand the wear and tear of decoking/descaling.