Safety Flash
Uncontrolled decompression during gangway move
Uncontrolled decompression during gangway move
- IMCA
- Safety Flash
- IMCA SF 09/04
- DivingManagement of ChangePressure SystemsStructural and Asset Integrity
- Pressure systemsStructural and asset integrity
- Marine operationsSaturation diving
- GangwayPressure vesselValve
- Management of change
Summary
A gangway struck a hyperbaric chamber fitting during raising, causing uncontrolled decompression of a man-way trunk and adjacent entry lock. Four divers were in saturation; no injuries were reported. Initial findings identified an unprotected fitting and door misalignment. Recommendations address impact protection, door alignment and management of proposed modifications.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Structural and asset integrity; asset integrity; structural integrity.
Classifications: Marine operations; maritime operations.
Classifications: Saturation diving; sat diving.
Classifications: Gangway; walk-to-work gangway; W2W gangway.
Classifications: Pressure vessel; pressure vessels.
Classifications: Valve; valves.
Classifications: Management of change; MOC; change management.
Summary
A gangway struck an unprotected hyperbaric fitting, causing uncontrolled decompression and highlighting equipment protection and system alignment requirements.
IMCA SF 09/04. Themes: diving, management of change, pressure systems, structural and asset integrity.