Date: 17 June 2022 Equipment: Ammonia Converter R-101 Bed Affected: #2 Event: Temperature excursion Peak Temperature: 548 degC Cause: Feed purity upset Trip System: TAHH-101 Trip Setpoint: 530 C Trip Action: Cut feed via FV-101, depressurised to flare Catalyst: KM1R Catalyst Inspection Result: No permanent damage found
Design Specifications (R-101) Design Pressure: 180 barg Design Temperature: 500 C Beds: 3, axial-radial PSV: PSV-101 PSV Setpoint: 180 barg PSV Capacity: 12,400 kg/h to flare
Operational Guidelines Ramp Pressure (Startup): <= 5 bar/min Bed Inlet Temperature (Hold): 380-420 C Runaway Risk Threshold: Above 530 C
Action Taken: Added feed-purity interlock Status: Closed Author: K. Bose, HSE