Safety Flash
Partial parting of a bell main lift wire
Partial parting of a bell main lift wire
- IMCA
- Safety Flash
- IMCA SF 08/08
- CorrosionCrane and RiggingDivingInspection and Maintenance
- CorrosionMechanical failure
- Diving operationsInspection and maintenanceLifting operations
- Diving bellWire rope
- Preventive maintenance
Summary
A diving bell’s main lift wire was found damaged during recovery following partial parting. Internal corrosion had reduced core wire sizes by up to 50%, despite no visible external damage. The flash examines lubricant loss, undetected deterioration and possible sheave and loading effects, urging members to consider reviewing wire-rope maintenance and testing policies.
Classifications: Corrosion; corrosion damage.
Classifications: Mechanical failure; equipment failure.
Classifications: Diving operations; diving; commercial diving.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Diving bell; closed bell; wet bell.
Classifications: Wire rope; steel wire rope.
Classifications: Preventive maintenance; preventative maintenance; planned maintenance.
Summary
A diving bell lift wire partially parted because of hidden internal corrosion and lubricant loss that inspections failed to detect.
IMCA SF 08/08. Themes: corrosion, crane and rigging, diving, inspection and maintenance.