HIAD events | Clean Hydrogen Knowledge Hub

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02/12/1976
United States

Explosion on a turbopump at an aerospace testing facility

Event ID: 339
Quality: 3
Application: Laboratory / R&D
Component involved: compressor / booster / pump (seal)
Hydrogen supply chain stage: Hydrogen as fuel
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 01/11/2025

23/12/2003
Italy

Road incident CGH2 tube trailer

Event ID: 338
Quality: 5
Application: Hydrogen transport and distribution
Component involved: piping (collector)
Hydrogen supply chain stage: hydrogen transport
Nature of the consequences: explosion
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 28/02/2009

01/02/2004
Italy

CGH2 tube trailer off road

Event ID: 337
Quality: 4
Application: Hydrogen transport and distribution
Component involved: valve (generic)
Hydrogen supply chain stage: hydrogen transport
Nature of the consequences: release, no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 28/02/2009

01/03/2003
Italy

multiple collisions involving a CGH2 tube trailer

Event ID: 336
Quality: 4
Application: Hydrogen transport and distribution
Component involved: CGH2 tube (trailer)
Hydrogen supply chain stage: hydrogen transport
Nature of the consequences: fire
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 28/02/2009

01/01/1950 - 31/12/1974
United States

Explosion in a LH2 vessel

Event ID: 335
Quality: 3
Application: Laboratory / R&D
Component involved: LH2 tank (stationary, small)
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: 30/10/2025

23/05/2001
United Kingdom

Hydrogen line leakage in a metal production plant

Event ID: 334
Quality: 2
Application: Steel and metals industry
Component involved: flange (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: 28/02/2009

01/01/1950 - 31/12/1974
United States

Release of LH2 due valve failure

Event ID: 333
Quality: 2
Application: Non-road vehicles
Component involved: valve (non-return)
Hydrogen supply chain stage: Hydrogen as fuel
Nature of the consequences: release, no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 30/10/2025

07/08/2007
United Kingdom

Explosion from accidental hydrogen production

Event ID: 332
Quality: 4
Application: Other
Component involved: reactor / oven / furnace / test chamber
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: 28/02/2009

01/01/1950 - 31/12/1974
United States

Unplanned LH2 venting

Event ID: 331
Quality: 2
Application: Non-road vehicles
Component involved: pressure regulator
Hydrogen supply chain stage: Hydrogen as fuel
Nature of the consequences: release, no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 30/10/2025

01/01/1950 - 31/12/1974
United States

Fire on a LH2 cryostat

Event ID: 330
Quality: 3
Application: Laboratory / R&D
Component involved: LH2 tank (stationary, small)
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: 30/10/2025