In a recent outage in a high temperature plant in Asia, creep damage was found on certain cold formed bends. An assessment of replicas concluded that the damage was indicative of creep in its tertiary phase and the bends were removed from service. A subsequent metallurgical examination of the cross-section of the bend was carried out. The findings suggested that damage was not as severe through-wall as had been observed in the replicas.
Alignment of the cavities was less severe. Therefore, ETD was approached with a request to perform accelerated creep testing to provide an estimate for the remaining life of the material. This was used to make run/replace decisions on such components. For more information about our life assessment services please click here.