Dears,
I encountered an advisory warning when designing Atmosheric flash tank with design temp = 510°C stating:
"The temperature of 510°C is above the CS-2 vacuum chart temperature limit of 480°C."
It appears that while the software calculates the allowable compressive stress using CS-2, the vacuum chart does not support values beyond 480°C. This raises concerns about the validity of the shell thickness calculation under external loads. Could you please confirm whether this affects the structural integrity and if additional verification is required?
Additionally, COMPRESS recommends avoiding reinforcing pads where time-dependent material properties govern. Since this applies at 510°C, reinforcing pads cannot be used, and self-reinforced nozzles would be the preferred option.
Given that the service is intermittent and operates at high temperatures, there may be significant temperature gradients, leading to cyclic thermal loading. This could introduce thermal fatigue concerns. Based on these conditions, would a fatigue assessment be necessary for this design?
I would appreciate your insights and recommendations on how best to proceed.
I encountered an advisory warning when designing Atmosheric flash tank with design temp = 510°C stating:
"The temperature of 510°C is above the CS-2 vacuum chart temperature limit of 480°C."
It appears that while the software calculates the allowable compressive stress using CS-2, the vacuum chart does not support values beyond 480°C. This raises concerns about the validity of the shell thickness calculation under external loads. Could you please confirm whether this affects the structural integrity and if additional verification is required?
Additionally, COMPRESS recommends avoiding reinforcing pads where time-dependent material properties govern. Since this applies at 510°C, reinforcing pads cannot be used, and self-reinforced nozzles would be the preferred option.
Given that the service is intermittent and operates at high temperatures, there may be significant temperature gradients, leading to cyclic thermal loading. This could introduce thermal fatigue concerns. Based on these conditions, would a fatigue assessment be necessary for this design?
I would appreciate your insights and recommendations on how best to proceed.