Scenario

01. Poor Value Perception
02. Poor Safety Awareness
03. Inadequate Risk Recognition
04. Organizational Problems
05. Poor Management
06. Poor Operation Management
07. Usage
08. Maintenance/Repair
09. Insufficient Inspection
10. Bad Event
11. Mechanical Event
12. Looseness of Bolt
13. Failure
14. Deformation
15. Creep
16. Secondary Damage
17. External Damage
18. Leakage/Fire

Leakage and fire of naphtha and hydrogen caused due to a tightening problem of a flange at a naphtha catalytic reforming unit
Case Details

Knowledge Comment:
Tightening force of the flange bolts was imbalance. The looseness was gradualy progressed.

Field Chemicals and Plants
Author WADA, Yuji (National Institute of Advanced Industrial Science and Technology)
TAMURA, Masamitsu (Center for Risk Management and Safety Sciences, Yokohama National University)