(115c) Application of Quantitative RBI on the Hydrocracking Unit

The loss of accident increases while the influence of social deteriorates because of the maximization and complication of equipment in petrochemical industry. Hydrocracking, as one of the most important catalytic processes of petrochemical industry, is also a frequent accident process. Developing optimization risk management in hydrocracking unit has function of significance in guaranteeing process smoothly of exploration and production. Under these demand, the Risk-Based inspection (RBI) was presented and widely prevailed in petrochemical enterprises of Europe and America.

Quantitative RBI on equipment of a hydrocracking unit starts at inspection data collection which is followed by identification and assessment of damage mechanism andfailure modes. Equipment risk is assigned with the help of Orbit-onshore (DNV) software. According to quantitative RBI results, risk level for each piece of equipmentitem is established and prioritized by criticality matrix so that equipment rank helps defying critical equipment which would be inspected thoroughly. Eventually, an appropriate inspection program for this unit is designed. Meantime, numbers of proper countermeasures are proposed through quantitative RBI assessment to control the frequency of shutdown and to extend inspection interval by assigning resources of inspection and maintenance.