A process operator was working in the collaring/ decollaring area of a mechanical workshop. An electric cross cut saw was used to make two diagonal cuts in the collar of a hydrogen cylinder before removal of the collar with a hammer and chisel. An angle grinder is also occasionally used where a collar is proving difficult to remove. Sparks from the cutting process caused ignition of hydrogen present in container.

Explosion in an open road. 6 people suffered minor burns on faces or hands.

The bolts on a not further specified industrial facility failed after approximately 4000 hours in service (approximately 18 months in service). Their failure bolts causedH2S leaks. The bolts fractured as a result of a hydrogen embrittlement mechanism (Hydrogen Stress Cracking) in a H2S rich atmosphere and in presence of humidity.

3 people were killed when 18 hydrogen gas cylinders exploded.

A factory was evacuated after a tank began leaking hydrogen. No injuries were reported

An explosion at a hydrogen recovery plant resulted in the injury of 10 people.

Overpressure caused a cylinder head of a gas compressor to fail causing release of hydrogen followed by a fire during the start-up of the compressor after maintenance.

Lightning caused fires at plant near Hamburg after igniting a hydrogen mixture release through a ventilation pipe

A welder was welding a stainless steel drain pipe with an arc welder, above a sulfuric acid storage tank. When he lowered the pipe, the hydrogen gas in tank ignited causing an explosion and one casualty