HIAD Causes: Material/Manufacturing Error

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…

A pressure relief device (frangible burst disk) on one of a hydrogen delivery tube trailer`s 26 tubes failed prematurely and released hydrogen while filling a hydrogen storage tank at a government…

An isomerization unit of a refinery was affected. The release was caused by the mechanical failure of one of the two compressors working in parallel at a pressure of 20 bars, conveying the gas…

The laboratory works with soil bacteria that cannot survive in the presence of oxygen. As a result, research work is conducted inside a plastic chamber in which the chemical constituents in the air…

A leak and fire occurred in a hydrogen compression section of a hydrocracker.

The whole content of the rail tanker, that is 42,000 l (about 2600 kg) of liquid hydrogen, was entirely lost over a period of seven hours via the venting line of a tank. The accident occurred at a…

At a refuelling station for buses, the first dispenser had been taken out of operation, becasue leaking (see HIAD event 403). Another dispenser was being used. Fuelling was taking too long and was…

During a filling at a hydrogen refuelling station, the station was shut down due to a gas detection. The leak was extremely small and difficult to locate but the gas was directed upwards towards the…

[NOTE: The system involved in this neear miss are not completely clear]The system involved appears to consist in an electrolyzer, a compressor and high pressure tanks, used to refuel hydrogen buses.…

An operator noted a loose tube sheet flange stud on a high temperature, high pressure heat exchanger in an hydrodealkylation unit.The stud was found to be cracked through. Analysis proved to be made…

A chemical mobile intervention unit intervened in the faculty to neutralize in an envelope sealed an experimental device likely to release hydrogen. The faculty was evacuated during the intervention.

This near miss occurred at the at an airport's hydrogen refilling station. Around 4:30 a.m., the hydrogen detector of the station was triggered and a sound and light alarm were activated. The…

This near miss occurred at an airport's hydrogen refilling station. At 7:35, a hydrogen leak was detected by hearing whistles in the near of a pipe. The operators warned the airport firefighters ten…

An oil leak in a compressor was identified in the end of Aug 2015 by a technician performing regular maintenance on the compressor. The oil leak had caused a contamination of the entire system from…

A hydrogen pipe burst at a semiconductor plant injuring 1 person

An explosion or fire occurred in a hydro-treatment unit which was processing Fluid Catalytic Cracking feedstock. It was caused by a failure in a pipe downstream from a separator, resulting in the…

A series of explosions at an oil refinery reformer unit caused by a rupture to an 8 inch naphtha and hydrogen feed pipe. The large number of injuries was due to the close proximity of a construction…

The nuclear plant was a boiling-water reactor with an output of 0.54 million kW. The component affected was a steam piping (inside diameter: 15 cm; thickness: 1.1 cm) of a heat exchanger used for…

The utility production facilities (electricity, water, air, and steam) at a refinery were isolated from the power grid and switched to two turbine generators in anticipation of a storm. At 9:50 p.m…

The vessel affected by the incident was a gas storage used for the desulfurisation process. The desulfurization gas had high hydrogen content. The vessels had cracks in the upper transverse fillet…