Safety Flash
Near-miss: Cement tank hatch failure
Near-miss: Cement tank hatch failure
- IMCA
- Safety Flash
- IMCA SF 09/12
- Management of ChangePressure SystemsStructural and Asset Integrity
- Mechanical failurePressure systemsStructural and asset integrity
- Pressure testing
- Pressure vessel
- Management of changePositive retention and reliable securing
Summary
A cement tank hatch failed during integrity testing at approximately 4 bar, rapidly releasing pressure. Nobody was in the cement room and no injuries occurred. Preliminary findings identified securing dogs replaced by oversized nuts, without proper documentation or management of change. A thorough investigation was continuing.
Classifications: Mechanical failure; equipment failure.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Structural and asset integrity; asset integrity; structural integrity.
Classifications: Pressure testing; hydrostatic testing; pneumatic testing.
Classifications: Pressure vessel; pressure vessels.
Classifications: Management of change; MOC; change management.
Classifications: Positive retention and reliable securing.
Summary
A cement tank hatch failed during pressurisation after securing hardware was replaced without documentation or management-of-change review.
IMCA SF 09/12. Themes: management of change, pressure systems, structural and asset integrity.