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The scope of this paper is to illustrate how to avoid corrosion on the resistant body off high pressure equipment in urea plants, caused by leaks in the welds in contact with the process fluid, both on equipment to be designed and on equipment already in operation.i Useful recommendations and criteria are therefore illustrated, which are to be considered for the equipment at the design stage, while for the equipment already in operation the maintenance actions to be taken in order to avoid corrosion on the resistant body are described.