HIAD events | Clean Hydrogen Knowledge Hub

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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 by-product
Nature of the consequences: release, no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 01/01/2020

14/10/1968
Unknown

Explosion in a chlorine production plant

Event ID: 661
Quality: 2
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: 01/01/2020

05/01/1977
United States

Fire at a methanol plant

Event ID: 658
Quality: 2
Application: Chemical industry
Component involved: pipe (generic)
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

05/12/1970
United States

explosion at a hydrocracking reactor of a refinery

Event ID: 657
Quality: 3
Application: Petrochemical 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: 01/01/2020

01/01/1970
United Kingdom

Fire In the hydrodesulphurization unit of a refinery

Event ID: 656
Quality: 3
Application: Petrochemical industry
Component involved: heat exchanger (pipe)
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: 01/01/2020

01/01/1971
United Kingdom

Fire In the hydrodesulphurization unit of a refinery

Event ID: 655
Quality: 3
Application: Petrochemical industry
Component involved: heat exchanger (pipe)
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: 01/01/2020

16/01/1971
United Kingdom

Short circuit on a boiler of a refinery

Event ID: 654
Quality: 3
Application: Petrochemical industry
Component involved: venting system
Hydrogen supply chain stage: Hydrogen as process gas
Nature of the consequences: near miss
Classification of the physical effects: No Hydrogen Release
Date entry in HIAD: 01/01/2020

22/05/1971
United Kingdom

Explosion and fire in a hydrogen compressors building

Event ID: 653
Quality: 3
Application: Petrochemical industry
Component involved: gauge/instrument
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

01/01/1976
United States

Explosion at the off-gas system of a nuclear power plant

Event ID: 652
Quality: 2
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: 28/01/2026

01/01/1971
United Kingdom

Fire in a refinery

Event ID: 651
Quality: 3
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