Safety Flash
Rigging failure during riser recovery – soft slings parted
Rigging failure during riser recovery – soft slings parted
- IMCA
- Safety Flash
- IMCA SF 05/21
- Crane and RiggingDropped ObjectsLifting Operations
- Dropped objectsMechanical failure
- DecommissioningLifting operationsRigging
- Lifting accessoriesWire rope
- Exclusion zonesRisk assessment
- Vessel
Summary
During riser recovery at sea, a 3.8-tonne section fell approximately 2.5 m onto the deck after sharp deadman-anchor edges cut its soft slings. Personnel remained behind barriers. The flash recommends wire rope slings, subject to a risk-assessed exception, and consideration of rounded anchors or welded pad eyes.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Mechanical failure; equipment failure.
Classifications: Decommissioning; facility dismantling.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Rigging; slinging.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Wire rope; steel wire rope.
Classifications: Exclusion zones; red zones; restricted access zones.
Classifications: Risk assessment; hazard assessment.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
While being recovered at sea, a 10m riser section (3.8Te) fell approximately 2.5m to deck when the slings parted after rubbing on the sharp edge of the deadman anchor
IMCA SF 05/21. Themes: crane and rigging, dropped objects, lifting operations.