Event
- Event ID
- 542
- Quality
- Description
A joint failure allowed a mixture of hydrogen and nitrogen into the atmosphere.
Failure of double cone joint on waste heat boiler in synthesis loop caused release of synthesis gas at 28.7 MPa and 170 degrees C after shutdown for maintenance.
There was no structural damage.- Event Initiating system
- Classification of the physical effects
- Unignited Hydrogen Release
- Nature of the consequences
- leak no ignition
- Macro-region
- Europe
- Country
- United Kingdom
- Date
- Component involved
- joint/connection (threaded)
- Failure mode
- rupture, no ignition
- Initiating cause
- unknown
- Root causes
- Unknown
- Date entry in HIAD
- 01/01/2020
Facility
- Application
- Chemical industry
- Sub-application
- Ammonia production
- Hydrogen supply chain stage
- All components affected
Ammonia storage tank, connection between ship and storage
- Process temperature range [C]
- High temperature (100°C to 500°C)
- Location type
- Unknown
- Location
- industrial area
- Operational condition
- Pre-event occurrences
The unit was shutdown for maitenance at the moment of the release
Emergency & Consequences
- Number of fatalities
- 0
- Number of injured persons
- 0
In-depth data
- Release type
- gas mixture
- Involved substances (% vol)
- H2, synthesis gas and N2
- Probable IGNITION SOURCE
References
- Sources categories
- News
- Reference & weblink
Extract from Leonoir and Davenport, Survey of Vapor Cloud Explosions: Second Update, Process Safety Progress, 12 (1993) 12-33.
Leonoir and Davenport, Survey of Vapor Cloud Explosions: Second Update, Process Safety Progress, 12 (1993) 12-33.
