HIAD events | Clean Hydrogen Knowledge Hub

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22/03/2025
Germany

Leak on a hydrogen bus

Event ID: 1189
Quality: 4
Application: Road vehicles
Component involved: joint/connection (threaded)
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: 30/08/2025

25/02/2019
Japan

Detection alarm in compressor room of a mobile production facility

Event ID: 1188
Quality: 2
Application: Hydrogen refuelling station
Component involved: compressor / booster / pump (seal)
Hydrogen supply chain stage: hydrogen on-site supply
Nature of the consequences: release, no ignition
Classification of the physical effects: Unignited Hydrogen Release
Date entry in HIAD: 30/08/2025

07/10/2014
Japan

Conventional fire on a CGH2 tube trailer

Event ID: 1187
Quality: 2
Application: Hydrogen transport and distribution
Component involved: TPRD
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: 30/08/2025

12/11/2006
Japan

LH2 tanker venting on a highway

Event ID: 1186
Quality: 3
Application: Hydrogen transport and distribution
Component involved: PRD (valve)
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: 30/08/2025

19/10/2004
Japan

A road incident involving a CGH2 cylinders trailer

Event ID: 1185
Quality: 2
Application: Hydrogen transport and distribution
Component involved: valve (generic)
Hydrogen supply chain stage: hydrogen transport
Nature of the consequences: fire
Classification of the physical effects: Hydrogen Release and Ignition
Date entry in HIAD: 30/08/2025

26/12/2018
China

Explosion and fire at a university laboratory

Event ID: 1184
Quality: 4
Application: Laboratory / R&D
Component involved: reactor / oven / furnace / test chamber
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: 30/08/2025

21/01/2023
United States

Fire at a fired heater of an hydrocracking unit

Event ID: 1183
Quality: 5
Application: Petrochemical industry
Component involved: heat exchanger (pipe)
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: 30/08/2025

03/02/2023
United States

Flash fire on a vessel containing rest of process gases

Event ID: 1182
Quality: 3
Application: Chemical industry
Component involved: chemical storage tank
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: 30/08/2025

13/05/2024
Austria

Explosion in a metals processing plant due to unexpected hydrogen production

Event ID: 1181
Quality: 2
Application: Steel and metals industry
Component involved: venting system
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: 30/08/2025

19/04/2023
United States

Fire in a hydro-cracking unit due to the failure of a hose

Event ID: 1180
Quality: 4
Application: Petrochemical industry
Component involved: hose (generic)
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: 06/01/2025