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Clean Hydrogen Partnership

Hydrogen release in an ammonia plant

Event

Event ID
112
Quality
Description

Compressed hydrogen escaped from reactor due to faulty gasket.

Event Initiating system
Classification of the physical effects
Unignited Hydrogen Release
Nature of the consequences
release, no ignition
Macro-region
North America
Country
United States
Date
Component involved
flange (gasket)
Failure mode
rupture
Initiating cause
material degradation (generic)
Root CAUSE analysis

The INITIATING CAUSE was the loss of containment due to the failing of a gasket. 

ROOT CAUSE unknown.

Root causes
Date entry in HIAD
28/02/2009

Facility

Application
Chemical industry
Sub-application
ammonia and derivates production
Hydrogen supply chain stage
All components affected

ammonia reactor

Process temperature range [C]
High temperature (100°C to 500°C)
Process pressure range [MPa]
medium to high pressure (10 to 50 MPa)
Location type
Unknown
Location
industrial area
Operational condition
UNKNOWN
Description of the facility/unit/process/substances

it could be assumed that the mentioned 'reactor' was probably the ammonia synthesis reactor. 

Emergency & Consequences

Number of fatalities
0
Number of injured persons
0
Currency
US$
Property loss (onsite)
50.000

In-depth data

Release type
gas
Involved substances (% vol)
H2 100%
Probable IGNITION SOURCE
Explosion type
Deflagration

References

Sources categories
Zalosh
Reference & weblink

Extract from Table II of Appendix A of Zalosh and Short COMPARATIVE ANALYSIS OF HYDROGEN FIRE AND EXPLOSION INCIDENTS Quarterly Report No. 2 for Period December 1, 1977 - February 28, 1978 https://www.osti.gov/biblio/6566131 (accessed September 2020)