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This data is from the European Hydrogen Incidents and Accidents database HIAD 2.1, European Commission, Joint Research Centre.

Release of Syngas from an Ammonia Production Unit
In an ammonia production unit, a 350-bar leakage of synthesis gas (ammonia + hydrogen) occurred in the compressor room. The leak was the result of the failure of a weld on a line (2") at the outlet of the compressor. A flammable cloud formed in the room (15 m x 105 m), 30 to 45 s later. One of the electric motors of the four compressors present was probably at the origin of the ignition, which brought first to an explosion followed by a fire which lasted about ten minutes.8 people injured, the surrounding buildings were damaged in various ways, as well as the cooling tower and the plant's acid production unit.
Event Date
July 6, 1985
Record Quality Indicator
Event Initiating System
Classification of the Physical Effects
Nature of the Consequences
Cause Comments
the immediate cause was the failure of a weld on a line (2 ") at the outlet of a compressor.The root cause is unknown
Facility Information
Application Type
Application
Specific Application Supply Chain Stage
Components Involved
ammonia reactor, syngas compressor
Storage/Process Medium
Actual Pressure
350
Design Pressure
350
Location Type
Location description
Industrial Area
Pre-event Summary
a 350-bar leakage of synthesis gas (ammonia + hydrogen?) occurs in the compressor room as a result of the failure of a weld on a line (2 ") at the outlet of a compressor. One of the electric motors of the four compressors present is probably at the origin of the explosion of the cloud formed in the room of 15 mx 105 m, 30 to 45 s later.
Lessons Learned
Lessons Learned
Unknown
Event Nature
Emergency Action
A fire lasted about ten minutes.
Detonation
No
Deflagration
No
High Pressure Explosion
No
High Voltage Explosion
No
Source Category
References
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