Incident Date: 17 June 2022 Equipment: Ammonia Converter R-101, Bed #2 Event: Temperature excursion Excursion Temperature: 548 degC Cause: Feed purity upset Safety System Action: TAHH-101 (set 530 C) tripped, cutting feed via FV-101 and depressurising to flare. Catalyst: KM1R, inspected, no permanent damage found.

Design Specifications

• Design Pressure: 180 barg
• Design Temperature: 500 C
• Beds: 3 axial-radial
• PSV-101 Setpoint: 180 barg
• PSV-101 Capacity: 12,400 kg/h to flare

Operational Guidance

• Pressure Ramp (Startup): <= 5 bar/min
• Bed Inlet Hold (Startup): 380-420 C
• Runaway Risk: Above 530 C

Action Taken: Added feed-purity interlock. Status: Closed Reported By: K. Bose, HSE