In a urea plant high pressure synthesis section there are several high pressure pipelines prone to higher vibrations. For example the discharge lines of reciprocating high pressure ammonia and carbamate pumps or CO2 compressors and the pipelines in which the pressure drop is large as one goes from high synthesis pressure to the recirculation stages, which operate at significant lower pressures. Special precautions are needed to reduce and control the vibrations in these lines and to assure a safe and reliable operation. It is not always an easy and straightforward exercise as one can see in the round table discussions below. But by sharing experiences, valuable suggestions come up to solve the problems.
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