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51315-5488-Impact of Throughput Increment on Corrosion Enablers and Risks Levels in a Hydrocraking Unit

Picture for Impact of Throughput Increment on Corrosion Enablers and Risks Levels in a Hydrocraking Unit
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Product Number: 51315-5488-SG
ISBN: 5488 2015 CP
Author: Faisal Alabbas
Publication Date: 2015
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$20.00
$20.00
Increasing plant capacity is one the critical changes that should be assessed thoroughly to avoid the possibility of increasing corrosion risks and hazards introduction to operations process and control parameters. A systematic approach has been developed and utilized to directly assess the Impact of the capacity increase in a Hydrocracking Unit. This study has determined the possible changes in corrosion drivers and subsequent corrosion loops risk matrix and inspection strategies using a quantitative risk-based decision process. The sensitivity analysis reveals that increased capacity changes requires focus in the following areas - erosion corrosion due to velocity increases ammonium bisulfide (NH4HS) fouling and potential heater tube life reduction. Process simulation and corrosion prediction softwares along with Risk Based Inspection reassessments were employed. The study concluded that the capacity increase is feasible provided: the water wash treatment was increased to account for additional NH4HS additional on stream inspection were provided for systems susceptible to erosion corrosion and selective metallurgical upgrades were planned for improved sulfidation resistance.
Increasing plant capacity is one the critical changes that should be assessed thoroughly to avoid the possibility of increasing corrosion risks and hazards introduction to operations process and control parameters. A systematic approach has been developed and utilized to directly assess the Impact of the capacity increase in a Hydrocracking Unit. This study has determined the possible changes in corrosion drivers and subsequent corrosion loops risk matrix and inspection strategies using a quantitative risk-based decision process. The sensitivity analysis reveals that increased capacity changes requires focus in the following areas - erosion corrosion due to velocity increases ammonium bisulfide (NH4HS) fouling and potential heater tube life reduction. Process simulation and corrosion prediction softwares along with Risk Based Inspection reassessments were employed. The study concluded that the capacity increase is feasible provided: the water wash treatment was increased to account for additional NH4HS additional on stream inspection were provided for systems susceptible to erosion corrosion and selective metallurgical upgrades were planned for improved sulfidation resistance.
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