Safety Flash
Dropped GRP cover during subsea lifting
Dropped GRP cover during subsea lifting
- IMCA
- Safety Flash
- IMCA SF 02/26
- Crane and RiggingDivingDropped ObjectsLifting Operations
- Dropped objectsMechanical failure
- Diving operationsLifting operationsRiggingROV operations
- CraneLifting accessoriesRemotely operated vehicle
- Exclusion zonesLifting planManagement of changeStop-work authority
- Marine industry
- Subsea
Summary
A GRP manifold cover detached during subsea relocation and dropped approximately 7 m, without injury or damage to the manifold or bottom structure. Findings identified excessive loading during a crane mode transition and erroneous lifting-rod calculations. Revised lift planning removed the mode switch and used deployment lifting points; keeping divers clear prevented potential serious injury.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Mechanical failure; equipment failure.
Classifications: Diving operations; diving; commercial diving.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Rigging; slinging.
Classifications: ROV operations; remotely operated vehicle operations.
Classifications: Crane; cranes.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Remotely operated vehicle; ROV; underwater robot.
Classifications: Exclusion zones; red zones; restricted access zones.
Classifications: Lifting plan; lift planning.
Classifications: Management of change; MOC; change management.
Classifications: Stop-work authority; stop work; stop-work intervention.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Subsea; underwater worksite.
Summary
A vessel was lifting and relocating a Pipe Line End Manifold (PLEM) GRP Top Cover when the load became detached and dropped approx. 7m.
IMCA SF 02/26. Themes: crane and rigging, diving, dropped objects, lifting operations.