In a residual-oil hydrotreatment unit (also called residual oil hydrogenation) plant, a hydrogenation unit caught fire with a huge bang, followed by a fireball in the form of a mushroom cloud. Black smoke began to billow up in the sky and was clearly visible from several kilometres away

While filling a 9 litre gas cylinder with pressurised hydrogen in the hydrogen storage area, a blast occurred which destroyed the low pressure gauge, followed by a jet fire which damaged the surface of the cylinder.The cylinder to be filled, including pressure gauge and control system, had been provided by a third party. Its nominal pressure was 35 MPa, however the maximal pressure of this filling would have been much lower, less than 20 MPa, corresponding to the maximal pressure of the bulk storage available.

A researcher was conducting an experiment that involved sawdust being heated at pressure using hydrogen gas in an laboratory-scale autoclave.The gas leaked from the autoclave during the experiment and ignited, causing injuries to the scientist (cuts, bruises and facial burns).The explosion caused extensive damage to the building, propelling debris more than 20 metres into a garden area.

During agricultural drainage work carried out by a farmer, an explosion occurred on a hydrogen pipeline located in a field. Flames several meters high were visible and two houses were evacuated. A safety perimeter was set up. The pipeline operator applied procedures to ensure the safety of the local residents and the pipeline.The damaged pipe was listed by the operator. The farmer did not declare the work site and no verification was done before starting the work.[ARIA event 57406]

An implosion/explosion occurred on a furnace in a company of copper metallurgy. The incident occurred at the end of the production cycle, when the furnace bell is lifted at the end of the cooling process. The operator in charge of the lifting was thrown away and slightly burned in the face. The victim was evacuated and the emergency services were alerted. The building structures (windows, doors, roof) experienced serious damage. The power supply was switched off.

At around 9:15 a.m., during a routine inspection, a flame was observed at the bottom flange of a reactor in a refinery. A few moments later, sensors near the leak detected a rise in temperature.The facility was shut down in accordance with emergency procedures. The sprinkler system was triggered to protect the equipment. The rapid decompression of the plant towards the safety flare reduced the leak flow rapidly. At 10:12 am, the fire was extinguished.

The incident occurred on a highway. The truck would have tried to avoid an obstacle fallen on the road. It so left the road, collided with the central guardrail and tipped over on the other side. The tractor caught fire, then a leak on one of the bottles containing hydrogen (approximately 20 tubes) ignited and the fire propagated.A security perimeter was set up by fire fighters / authorities. The road, as well as the parallel roads, was cut in both ways of traffic. A diversion was organized. It was necessary to let the hydrogen burn and extinguish by controlling the fire.

A hose of a hydrogen tanker parked in at a specialised company ruptured. The released hydrogen ignited and exploded, followed by a fire probably fed by the continuously leaking hydrogen. The local fire rescue team rushed to the scene after receiving the alarm call. The fire was quickly brought under control and extinguished. Firefighters continued to cool the tank to avoid further problems. There were no casualties at the scene. There were two hydrogen trailers parked at the accident site. The other truck was not affected.

The tanker crashed into the guardrail on a ring ramp leading to a highway. The tanker overturned, and the tank unit plunged more than 20 meters onto a road below.Witnesses reported multiple explosions which could be heard up to two kilometres away. (Taiwan English News of 30 September 2020.)

The incident occurred at a fuel cells manufacturing plant. The tanker was preparing to transfer liquid hydrogen to the company hydrogen bulk storage tank. During backing, it impacted an industrial building, causing a hole in the tank, with consequent leak and ignition. When the City fire brigade arrived on scene, the hydrogen gas was still escaping from the leak feeding the fire. They let the fire burn out and kept dousing the tanker till Saturday to reduce the temperature and to minimise possible the risk of explosion.