NBIC Repair of Light Cyclic Oil (LCO) and Heavy Cyclic Oil (HCO) Stripper Column

• Description of the Damage: Uniformly loss of thickness in a shell course and intermediate head of the column.
• Damage Mechanism: Sulfidation.
• Original Materials: Shell: JIS SB42, Intermediate head: JIS SB42.
• Original Construction Code: ASME BPVC Sec. VIII Div. 1
• Repair Code: NBIC Part 3.
• Solution: Shell course and intermediate head were fabricated and replaced including manway and nozzles placed in these parts.
• Scope: Repair procedure, drawings, ITP, procurement of materials, qualification of WPS’s and welders, fabrication and replacement of shell course and intermediate head, quality assurance and quality control activities, NDE, Certification and R Stamping.
• Results: Safe return of item to operation within the deadline.