Employee #1, a maintenance worker, was killed by a hydrogen blast while working inside a batch hydrogenation unit.

The event occurred at the factory producing multilayer circuit boards by a multistep dip operation. An employee inadvertently mixed 55 gal of 50 percent hydrogen peroxide into 110 gal of 30 percent formaldehyde. This resulted in a carbon monoxide and hydrogen release. The facility was evacuated and the local fire department and ambulance responded. 14 workers, out of whom three were from temporary employment agencies, were treated for inhalation and released.The employee did not look carefully at the label on the hydrogen peroxide drum.

Two employees were working on a electric furnace under hydrogen atmosphere that had jammed. The furnace exploded. The employees sustained flash burns to their faces and were taken to the hospital, where they were treated and released later the same day. The retrieval tool they were using was not suitable for servicing a hydrogen furnace, and may have been the ignition source for the explosion. The furnace had not been purged for 10 hours, as required by the manufacturer.

An employee was attempting to re-weld a lifting point on a brazing furnace cover. He was using a tungsten inert gas (TIG) welding machine to build up an attachment point on the cover when an explosion occurred. Its force lifted the furnace cover and propelled it against the employee. There were no witnesses to the incident. The furnace had apparently not been evacuated completely of gaseous hydrogen, and this may have triggered the explosion.

A serious chemical accident occurred at chemical industry producing olephins and phenols. The accident resulted in injuries to several workers and extensive damage to the plant, as well as minor damage to nearby residential property. Damage to the facility was estimated at $101 million and major transportation routes were closed for several hours. The U.S.

The event occurred at a company producing machines for water treatment for the food industry.A pressurized tank exploded killing two workers and shaking windows and ceilings at neighbouring companies for blocks around.The company was developing and manufacturing pressurised tanks used in water filtration system. On the day of the accident, a worker was experimenting with a system designed to add oxygen to water, for farming applications. The system involved was an 80-gallon water storage tank . By starting generating oxygen, hydrogen gas was produced and accumulated in the storage tank.

Maintenance works were ongoing after an outage at a turbine and generator unit of the plant. Fifteen maintenance mechanics were working at that time on the unit. An access cover was removed causing the release of hydrogen and resulting in multiple explosions and fires. The explosion was heard 35 miles away. The blast tore a huge section from a building holding the six coal-fired generators of the plant and caused two fatalities and several injuries. The hydrogen was used as cooler of the unit. It should have been purged before opening the system.

A hydrogen explosion occurred at a 585-MW coal-fired supercritical unit and caused one fatality, injuries to 10 other people, and significant damage to several buildings. The explosion occurred during a routine delivery of hydrogen when a hydrogen relief device failed, which allowed the contents of the hydrogen tank to escape and be ignited by an unknown source. The truck driver was delivering hydrogen gas to fill two 6500 cubic feet storage cylinders at the plant. The hydrogen gas was used to cool the generator at the power plant.