Catalyst Regenerator NBIC Repair

• Description of the Damage: Cracks on Nozzles.
• Damage Mechanism: Creep-fatigue assisted by external pipe loads + cyclic thermal gradients.
• Original Construction Code: ASME BPVC Sec. VIII Div. 1
• Repair Code: NBIC Part 3.
• Original Materials: Shell: SA-240 Tp. 321, Nozzles: SA-312 Tp. 321, Flanges: SA-182 F321.
• Solution: The defective nozzles were replaced, the corresponding NDE was performed, and the repair was certified R.
• Scope: Repair procedure, drawings, ITP, procurement of materials, qualification of WPS’s and welders, fabrication and replacement of nozzles in vessel, quality assurance and quality control activities, NDE, pickling and passivation, Certification and R Stamping.
• Results: Safe return of item to operation within the deadline.