HIAD events | Clean Hydrogen Knowledge Hub

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16/04/1977
United States

Explosion in a metal heat treating unit

Event ID: 671
Quality: 2
Application: Steel and metals industry
Component involved: reactor / oven / furnace / test chamber
Hydrogen supply chain stage: Hydrogen as process gas
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 28/01/2026

07/04/1977
United States

Explosion at a chlorine production unit

Event ID: 670
Quality: 2
Application: Chemical industry
Component involved: electrolytic cell (header)
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: 28/01/2026

14/07/1981
United States

Explosion in the waste decay tank of a nuclear power plant

Event ID: 669
Quality: 3
Application: Power plant
Component involved: off-gas system
Hydrogen supply chain stage: Unintended hydrogen production - radiolysis
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2020

22/03/1977
United States

Fire on a hydrogen pump

Event ID: 668
Quality: 2
Application: Chemical industry
Component involved: compressor / booster / pump
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: 28/01/2026

27/01/1977
United States

Explosion at a chlorine production unit

Event ID: 667
Quality: 2
Application: Chemical industry
Component involved: electrolytic cell (header)
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: 28/01/2026

21/08/1997

Fire on a naphtha cracker

Event ID: 666
Quality: 2
Application: Petrochemical industry
Component involved: reactor / oven / furnace / test chamber
Hydrogen supply chain stage: Hydrogen as process gas
Nature of the consequences: fire
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2020

01/01/1997
United States

Release of hydrocarbons from a pipeline

Event ID: 665
Quality: 2
Application: Petrochemical industry
Component involved: pipe (generic)
Hydrogen supply chain stage: Hydrogen as process gas
Nature of the consequences: explosion followed by a fire
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2020

08/01/1968

Explosion in a pharmaceutical plant

Event ID: 664
Quality: 2
Application: Hydrogen production
Component involved: gasholder/gasometer (H2)
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

14/03/1968
United States

Explosion on a cold box

Event ID: 663
Quality: 3
Application: Chemical industry
Component involved: pipe (weld)
Hydrogen supply chain stage: Hydrogen as process gas
Nature of the consequences: explosion followed by a fire
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/01/2020

19/04/1968
United States

Hydrogen leak from a cold box

Event ID: 662
Quality: 2
Application: Chemical industry
Component involved: heat exchanger (generic)
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: 01/01/2020