Gaseous hydrogen leaked from an oil pump part of the filling and conditioning system in a industrial gases production plant. The released hydrogen ignited and exploded. The cause has been a human…
Explosion within a blast furnace occurred at the plant manufacturing iron. The event occurred at one of the blast furnace of the plant, which exploded. The explosion was so powerful that the entire…
The accident happened in a low pressure methanol plant, commissioned in summer 1971 . A 6 in. pipe, below the methanol synthesis gas compressor inter-stage relief valve, failed releasing hydrogen-…
An explosion occurred involving a Microbiological Anaerobic Chamber of approximately 2 m3 capacity, containing an explosive mixture of hydrogen and air. A fire followed the explosion, but was rapidly…
This entry reports only the role of hydrogen in this nuclear accident. For a short description of the initial causes and the incident evolution, see at field pre-event summary and for a much more…
A hydrogen gas holder exploded.It is assumed that there was diaphragm leak in the hydrogen-oxygen electrolytic cell used to produce high purity hydrogen for a pharmaceutical hydrogenation.
In a pharmaceutical company classified Seveso upper-tier establishment, a deflagration occurs at the end of a hydrogenation reaction involving a chemical raw material, acetic acid, water and a…
A large explosion happened in the contractor amenities area. The explosion was thought to be caused by an explosive mixture of air and hydrogen which existed in the pipes. The force of the explosions…
In a polyethylene manufacturing plant, the explosion of a flammable cloud (isobutane, ethylene, hexane and hydrogen) escaped from a reactor during maintenance caused 23 fatalities and 314 injured…
The reduction stage of the powder production process of a chemical plant had been shut down, and the buffer tank of the line had been drained on the preceding day. After the shutdown, the batch to be…
A gas release occurred in the building for the recirculation of processes gas. The gas was a mixture of hydrogen and nitrogen. It occurred at the outlet valve, during works aiming to replace it. This…
Explosion in a fine organic chemical plant (Seveso classified )The event occurred during the cleaning of a reactor. At the completion of a batch manufacturing of a soft reducing agent, an operator…
This accident took place different phases and in two different units of a refinery: It consists first in a non-hydrogen accident, followed by a hydrogen-related accident.Before the hydrogen-related…
An explosion occurred at testing equipment of a fuel-feeding system for a space rocket engine. According to the original source of this event, now lost, the test envisaged a 42 MPa high-pressure…
Workers were performing demolition on a disused furnace. While removing a 10 inch valve from a pipe used to supply coke gas fuel to the furnace, flammable liquid was unexpectedly released and ignited…
A deflagration occurred inside the tank at the start of grinding operations. The tank had contained sulfuric acid. All preparatory procedures had been properly carried out: neutralisation of…
The incident occurred in a facility chrome-plating metals. At the time of the event, a metal roller was being chrome-plated. A short circuit occurred due to a defective contacting (contact rails) on…
An autowash machine was being used to clean aluminum trays with burnt on product. The autowash in normal situations cleans steel trays not aluminum. The cleaning fluid contained Na OH. On contact…
Explosion in generator area, thought to be hydrogen leak as a result of radial lead seal failure. Extensive plant damage.
A pinhole leak in the discharge hose of a portable tank containing sodium hydride reacted with water, and released hydrogen that ignited and exploded at a waste management plant.
An explosion occurred around noon while conducting hot work (with a disc saw) on a 320-m fixed-roof tank at a pharmaceutical plant employing 240 personnel. The tank belongs to a waste treatment…
waste water tank Hydrogen that causes the incident has been produced either during waste water treatment or by a reaction between sodium borohydride and the waste water filling the tank.
The explosion occurred in the ammonia/hydrogen separator of the ammonia reactor due to metallurgical problem.
The explosion was caused by the ignition of hydrogen during reaction with sodium metal. The Chemistry Department routinely dried solvents using metallic sodium. This leaves an excess of sodium metal…
A mechanical failure occurred in a gasification reactor, which caused a violent (abrupt, sudden) depressurization of the reactor. The consequences were the projection of tiles of the refractory…
The event occurred during welding works which ignited accidentally released hydrogen. The plant had been partially shut down for repairing works to a pipe affected by internal cracks. The repairing…
An explosion and fire occurred in a mud logging unit during the final phase of rigging it up. Gas analysers had been calibrated and the flame ionization detection (FID) and total hydrocarbon analyser…
Hydrogen was accidentally produced inside the sealed container containing a used battery. The gas, along 6 days deformed the container. Firefighters equipped with breathing apparatus open the…
The explosion occurred in a copper electroplating plant test furnace when starting the operation of copper plating. EVENT DETAILS A tinned copper pipe had been placed inside another copper pipe and…
Explosion in an electrolyzer producing chlorine The explosion occurred after the opening of an auxiliary circuit-breaker. The opening of the auxiliary circuit breaker trigger the shut down of the…
