Safety Flash
Failure of dive chamber overhead door centre pin
Failure of dive chamber overhead door centre pin
- IMCA
- Safety Flash
- IMCA SF 20/21
- CorrosionDropped ObjectsInspection and MaintenanceStructural and Asset Integrity
- CorrosionDropped objectsMaterial fatigueMechanical failure
- Diving operationsInspection and maintenance
- Diving bell
Summary
A diving bell overhead-door hinge pin failed after the dive team left the entry lock. The pin fell into the unoccupied lock, without pressure loss. The door was lowered under control and divers transferred. Investigation remained ongoing; suspected factors included design, corrosion and cyclic fatigue. Similar doors should receive prompt crack checks.
Classifications: Corrosion; corrosion damage.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Material fatigue; metal fatigue.
Classifications: Mechanical failure; equipment failure.
Classifications: Diving operations; diving; commercial diving.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Diving bell; closed bell; wet bell.
Summary
The Marine Safety Forum (MSF) has published Safety Alert 21-10 relating to a crew member who suffered an unpleasant cut to the hand whilst engaged in routine cleaning.
IMCA SF 20/21. Themes: corrosion, dropped objects, inspection and maintenance, structural and asset integrity.