HIAD events | Clean Hydrogen Knowledge Hub

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04/05/2008
United States

Release of hydrogen from a LH2 storage tank

Event ID: 782
Quality: 4
Application: Other
Component involved: PRD (burst disc)
Hydrogen supply chain stage: hydrogen storage
Nature of the consequences: leak no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 30/09/2025

10/08/1999
France

Explosion at a rubber factory, caused by accidental hydrolysis of chemicals.

Event ID: 781
Quality: 4
Application: Chemical industry
Component involved: chemical storage tank
Hydrogen supply chain stage: Unintended hydrogen production - chemical reaction
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2020

20/08/2021
Japan

fire on a flange of a heat exchanger

Event ID: 780
Quality: 5
Application: Petrochemical industry
Component involved: flange (bolts)
Hydrogen supply chain stage: Hydrogen as process gas
Nature of the consequences: leak no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 16/04/2026

26/07/2005
United States

Full emptying of a LH2 tank

Event ID: 779
Quality: 3
Application: Hydrogen stationary storage
Component involved: PRD (burst disc)
Hydrogen supply chain stage: hydrogen storage
Nature of the consequences: leak no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 16/04/2026

05/04/1975
United Kingdom

Explosion at the electrolysis unit of a chemical factory

Event ID: 778
Quality: 5
Application: Hydrogen production
Component involved: electrolytic cell (diaphragm)
Hydrogen supply chain stage: Hydrogen production
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2020

18/07/1975
Netherlands

Explosion in a chlorine production plant

Event ID: 777
Quality: 3
Application: Chemical industry
Component involved: electrolytic cell
Hydrogen supply chain stage: hydrogen as by-product
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2021

01/01/1989
United States

An explosion in the hydrogen storage of an ammonia production unit

Event ID: 776
Quality: 3
Application: Hydrogen production
Component involved: gasholder/gasometer (H2)
Hydrogen supply chain stage: hydrogen storage
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2021

01/08/1982
France

Failure of a pipe a ammonia plant due to hydrogen embrittlement

Event ID: 775
Quality: 4
Application: Chemical industry
Component involved: pipe (bend)
Hydrogen supply chain stage: Hydrogen as feedstock
Nature of the consequences: fire
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2021

07/02/2009
United States

Fire from a check valve when troublshooting

Event ID: 774
Quality: 4
Application: Power plant
Component involved: valve (check)
Hydrogen supply chain stage: Hydrogen as coolant
Nature of the consequences: fire
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 15/04/2026

03/08/1987
United States

Explosion in an ammonia production plant

Event ID: 773
Quality: 4
Application: Chemical industry
Component involved: flange (generic)
Hydrogen supply chain stage: Hydrogen as feedstock
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2021