HIAD events | Clean Hydrogen Knowledge Hub

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25/09/1996
United States

Roll-over of a LH2 tanker

Event ID: 480
Quality: 3
Application: Hydrogen transport and distribution
Component involved: gauge/instrument
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: 01/01/2025

26/11/1970
United States

Event ID: 479
Quality: 2
Application: Hydrogen transport and distribution
Component involved: LH2 tank (road tanker)
Hydrogen supply chain stage: hydrogen transport
Nature of the consequences: near miss
Classification of the physical effects: No Hydrogen Release
Date entry in HIAD: 01/01/2017

06/05/2019
Belgium

Hydrogen release from a hydrogen pipeline

Event ID: 478
Quality: 3
Application: Hydrogen transport and distribution
Component involved: pipeline (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: 01/01/2017

02/07/1968
United States

Explosion in a metal processing factory

Event ID: 477
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

30/01/1968
United States

Explosion in a silicon crystal growing reactor

Event ID: 476
Quality: 2
Application: Electrical, electronics and micro-electronics industry
Component involved: chemical storage tank
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

01/06/2019
United States

Explosion on a CGH2 tube trailer during filling

Event ID: 475
Quality: 5
Application: Hydrogen transport and distribution
Component involved: valve (gasket)
Hydrogen supply chain stage: Hydrogen transfer
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

15/01/1968
United States

Explosion of a reactor for the hydrogenation of ethylene

Event ID: 474
Quality: 2
Application: Chemical 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

01/11/1968
United States

Explosion in a chlorine production plant

Event ID: 473
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: 28/01/2026

06/12/1973
United States

Off-gas explosion at a nuclear power plant

Event ID: 472
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

20/09/1998
Japan

Fire on a heat exchanger at a benzene manufacturing plant

Event ID: 471
Quality: 4
Application: Petrochemical industry
Component involved: flange (bolts)
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: 27/12/2025