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HIAD Nature of the Consequences: Leak No Ignition


A leak occurred on the safety valve of a train wagon transporting liquid hydrogen wagon. The train was composed of 10 wagons. The train was stopped on the railway several hours to allow…
A leak occurred on a rack containing 12 cylinders of hydrogen (50 l at 200 bar each) delivered by a lorry inside the fenced storage area of a bulb manufacturing plant. The plants safety manager…
A tractor-trailer carrying canisters of gaseous hydrogen gas crashed on a major East Coast route. Compressed hydrogen gas leaked from some of the containers after the truck rolled on its side.
The accidental hydrogen release occurred when testing the storage system connected to a PEM electrolyzer. The leak test consisted in filling the storage with hydrogen at step-wise increase of…
A joint failure allowed a mixture of hydrogen and nitrogen into the atmosphere.Failure of double cone joint on waste heat boiler in synthesis loop caused release of synthesis gas at 28.7 MPa and 170…
An aerosol of hydrogen, hydrogen chloride and sulfuric acid is released in a plant producing chlorine via electrolysis.The exhaust pipe on the water circuit of the electrolyzer was blinded due to the…
The release took place in a metal cold rolling workshop.The hydrogen leaked from a cylinder of 15 m3, which was part of a storage system of 250 m3.Half of the workshop and the surrounding roads were…
A hydrogen release occurred in a storage area of a nuclear power plant.. The storage consisted of three trailers made of 14 compressed gas cylinders each. The cylinders, mounted horizontally, had a…
A hydrogen safety sensor went into alarm at a hydrogen demonstration facility. The early morning temperature was near freezing and there was a trace of precipitation on exposed surfaces. Upon further…
The event was initiated by the burst of a rupture disc on a reactor during a hydrogenation process. The hydrogenation reaction occurs under pressure in a tank containing 3,000 l of a mixture of…
The accident occurred on one of the heat exchangers of the hydro-desulfurisation unit. The role of the exchanger , located between the charge pumps and the furnace, is to heat the charge using the…
A release of contents of a pressure vessel occurred when a longitudinal weld tore open. The vessel had been shut down and had just been put into use again when the incident occurred.The gas mixture…
The leak occurred on the inlet pipe (P=21 bar, T=320C) of the diesel desulfurization reactor of a refinery. Hydrogen and diesel fuel were released in the gas phase. The hydrocarbons contaminates…
Although the ARIA report (see references) does not mention it, the unit affected was very probably the oil desulfurisation unit. The release occurred following the rupture of a pipe of 250 mm in…
Leakage of a mixture of hydrogen, nitrogen, citric, hydrofluoric and hydrogen sulfide occurs during ventilation shutdown on high temperature PVC furnaces. The accident follows an electrical outage…
A six-cylinder rack containing an argon / hydrogen mixture is dropped from a truck on a national highway, causing a gas leak.A security perimeter was set up. The services of the equipment took care…
Around 13:45, a hydrogen leak on a pipe occurred in a refinery. Cold cutting of a purge was underway on the equipment as part of a work stoppage. The worker, who detected the leak, stopped the air…
A leak occurred at a of a liquid withdrawal valve of a liquid hydrogen storage tank. The hydrogen escaped at the flange between the valve body and the upper part of the valve (flange with tongue and…
30 bottles with compressed hydrogen fell from a truck at a junction, because of speeding. The bottles started releasing hydrogen. Emergence team was called, and leak was stopped.
A hydrogen leak was reported at a chemical plant.
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