Safety Flash
Uncontrolled movement of a riser
Uncontrolled movement of a riser
- IMCA
- Safety Flash
- IMCA SF 11/18
- Control of WorkLifting OperationsLine of FireManagement of Change
- Line of fireMechanical failureRisk management
- Lifting operationsRigging
- CraneLifting accessories
- Management of changeOperating and work proceduresRisk assessmentSafety communication
- Marine industryUpstream oil and gas
- Vessel
Summary
During production riser deployment from a vessel, an additional bellyband and lever hoist arrangement failed after crane slewing, allowing uncontrolled riser movement and handrail damage. The investigation identified unassessed rigging changes, procedural failures and ineffective communication. Lessons emphasise management of change, clear task steps and unambiguous instructions.
Classifications: Line of fire; struck-by hazards.
Classifications: Mechanical failure; equipment failure.
Classifications: Risk management; risk evaluation.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Rigging; slinging.
Classifications: Crane; cranes.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Management of change; MOC; change management.
Classifications: Operating and work procedures.
Classifications: Risk assessment; hazard assessment.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
An added rigging arrangement was not managed through change control, allowing a riser to move unexpectedly during deployment.
IMCA SF 11/18. Themes: control of work, lifting operations, line of fire, management of change.