HIAD Classification of the Physical Effects: Hydrogen Release And Ignition

Due to the failure of a exhaust system, compressed hydrogen leaked into an area containing electrical components, with consequent fire.Leakage was allowed when exhaust system failed

The accident took place in a tank-type pressurised separator on the synthesis gas line of an ammonia production plant. The pressurised separator operates at nominal values of 25 bar and 5C. It…

In a fertiliser plant, an ammonia synthesis unit stopped following the malfunction of an alternator (due to a thunderstorm). The safety features were operating normally, yet the synthesis gas (N2 /…

The accident occurred on the hopper fine powders from a pair of cyclones (the hopper is the bottom conical part of the cyclone collecting the powder/dust separated from gas phase). A bursting disc…

The fire was in a polyamide production chemical plant classified SEVESODuring maintenance of an isolated unit producing a polyamide monomer (LACTAME), a fire developed on the ground floor of the unit…

A fire broke out at a flange of a heat exchanger used in the catalytic reforming unit of a refinery. This exchanger makes it possible to heat the load of heavy oil and hydrogen by recovering the heat…

A fire occurred at an oil factory during maintenance work. On the day of the incident, a distillation unit was shutdown for a steam air tightness test. Cooling equipment on the distillation unit was…

The accident occurred in the de-sulfurization unit, and specifically on a pipeline at 50 bar, for the recycling of the hydrogen (containing hydrogen sulfide impurities). The pipe failed due to…

A sudden fire started in the refinery's hydrocracking unit at the hydrogen compressor of re refinery (India).

A hydrogen skid was placed into service in a nuclear power plant, outside the controlled area. This skid, like seven others, was located in a gas cylinder storage facility. It was supplied by several…

An explosion occurred in the hydrogen washing tower of a chlorate plant caused by the breaking of the rupture diaphragms on the tower cover. The discharged hydrogen ignited, causing a minor leakage…

A fire started on the primary hydrogenation reactor of a chemical plant synthesizing alcohols and acids by reactions between olefins and a H2 / CO gas mixtures. The alcohols are synthesised in 3…

The accident originated in the isomerisation unit and propagated to the benzene saturation unit. The accident source was a mechanical rupture of one of the two compressors used to transfer hydrogen…

The event occurred on vent stack of an ammonia synthesis unit. The release of the gas was more specifically on the water purge line or the hydraulic guard of the vet stack. The process gas…

The fire occurred on the tube plate gaskets of 3 of the 4 exchangers loaded with catalytic reforming effluent. The fuel (500C and p=30 bar) was a mixture of 30% hydrocarbons and 70% hydrogen. After…

Release of gas from a coking plant on a 20 000 cubic meters gas holder which ignited causing a fire. The accident took place during repair works. The gas was made of 65 % of hydrogen , 25 % of…

As the airship approached the docking mast, it performed a sharp turn to face into the wind, which was shifting. The engines were run at full speed astern for about a minute to slow the airship. Dust…

A fire occurred on a flange of a hydrodesulfurisation unit during start-up operations. A failure of this flange caused of the leak.

In a petrochemical plant, visual inspection detects fumes under the heat insulation of a heat exchanger operating under hydrogen pressure. The first intervention team was mobilized and the unit…

The hydrogen bus was in the workshop. The fire started on the bus and expanded to the shed, which was containing also a conventional bus. Due to the presence of hydrogen, the fire brigade intervened…