BlueScope Steel (Port Kembla, New South Wales, Australia)
BlueScope Steel required stress analysis and fatigue assessment of over plating repairs for the 5BF stove pressure vessel DCD. Over plating repairs were required for the lower vertical and conical shell segments due to shell corrosion/erosion and shell cutouts representing localised buckled shell panels. Stress analysis and fatigue assessment was required to verify structural integrity of the over plating repairs in accordance with standard AS 1210 considering worst case reduced shell thickness applying permanent, internal pressure and thermal loads.
What we did:
- Performed stress analysis (thermal-structural FEA) of 5BF stove pressure vessel DCD with over plating repairs and reduced shell thickness, local nozzle reinforcement and shell cutouts at buckled locations applying permanent, internal pressure and thermal loads.
- Compared stresses and performed fatigue assessment of welds as per standard AS 1210 strength and serviceability requirements.
Outcome:
Avesta Consulting verified structural integrity and fatigue life of the 5BF stove pressure vessel DCD with over patch repairs considering worst case (corroded/eroded) shell thickness.
