Fixing pump suction head problems can cost a lot, as a recent experience illustrates. In this case, a site added a new unit to compress gas for sending via pipeline to a client. The specification stated the inlet gas would be liquid free. The initial assumption was that a small amount of liquid condensation would occur in the compressor inter-stage coolers. Inter-stage knockout drums would remove the condensate.After startup, the knockout drums filled rapidly. The liquid rate exceeded the system’s handling capacity. Temporary measures included pumping the liquid into trucks for handling. The liquid pumps suffered short lives and high failure rates. The situation…Full Story
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