Thermal analysis and NDT of crack in reactor vessel - Solvent Manufacturing

D C White was approached by a large European solvent manufacturing company who had unwittingly been running one of their reactor vessels above its design temperature. The additional thermal load already placed on the vessel meant that it was removed from service and a site visit organised to carry out Non Destructive Testing (NDT) on the welds connecting the external limpet coils to the tank was necessary. The weld containing the crack was ground out and re-welded. The combined results of the NDT and FEA were presented to the customer along with a proposed regular inspection routine, which included hydro-testing and vessel modification. With the additional modifications and maintenance routine, the vessel could be returned to service. The problem of ageing plant is widespread throughout the engineering industry, often large plant equipment has little or no history. Our experience with Safeplant? allowed us to be on site within a few days of the initial enquiry. The project in its entirety was performed in house without the need to involve additional contractors, thus ensuring complete project control and reducing the non-operational reactor time.

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