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