In a recent outage in a process plant in the Middle East, damages (i.e. misalignment, bulging, graphitisation etc.) were observed on certain welds of HP steam header. The scope of study involved metallographic examination, including microstructure analysis and hardness testing, and accelerated rupture testing for material samples removed from respective sections. This allowed assessment of the remaining life of the service-exposed header material, enabling improved remaining life predictions for the components within the HP steam header system.
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