HIAD Nature Event - Release Type: Gas

Two mechanic workers had picked up a work permit for the removal of filters from a hydrogen line. An operator also visited the scene and answered the mechanics question as to whether the line should…

The truck was delivering hydrogen to a steel products plant and contained from 1500 to 2000 gallons of liquid hydrogen (approximately 7000 to 9000 l). The hydrogen was being pumped from the trucks…

the fire was detected by an employee during the normal inspection tour, . It was caused by the ignition of a leak of process gas (hydrogen, methane and water vapour) from the reforming furnaces.…

Fire in a ammonia plant.The accident starts with a leak of a hydrogen-nitrogen mixture at the suction flange of a compressor. The mixture ignites on contact with air and the fire spreads to an oil…

This incident occurred in a unit processing vegetable oils and fats. A fire-brigade from the involved town was at the scene in a few minutes and was assisted by the Fire Department of a bigger city.…

Hydrogen and butyl acetate released and caught fire on the vent of a hydrogenation reactor, part of a dyes manufacturing plant. The pressure inside the reactor increased due to excess hydrogen…

The on-duty field technician noticed a self-sustained ignition in the hydrogen pipes of a sodium chlorate plant. The flare-like flame of less than one metre in height was located in the space above…

The fire occurred in the unit for the production of the hexamethylenediamine (HMD). The process is based on the hydrogenation of the adiponitrile [(CH2)4(CN)2]A jet fire of hydrogen was generated…

First an explosion and then a fire occurred on the condensate piping of an chlorine electrolysis plant (SEVESO upper tiers). Flames escape from the end of the pipe and spill into a 75 m open sky tank…

In an chlorine production plant, vented chlorine and hydrogen, auto ignited when the hydrogen concentration was allowed to exceed 5% and the mixture mixed with air.

A jet flame occurred in a diesel distillation unit. It was caused by the release and ignition of hydrogen from the low-pressure (60 bar) section of a the unit. It occurred during maintenance works…

a gas leakage (approximately 70% hydrogen, 21% nitrogen and the rest carbon monoxide and other impurities) occurred at the connection between a temperature measurement casing and a flange in the…

An isolation failure in starter coil of the high voltage generator induced an electric arc to the hydrogen supply line, with consequent fire and melting of the line.

A leak occurred on a 4 inch hydrogen main gas line which ran along a pipe bridge at the east end of a first stage compression plant building, ignited.The source of ignition was hot welding sparks…

Employees were refilling a rack of 15 hydrogen cylinders that were connected together on a steel pallet with railings. A leak developed at a valve and the pressurized hydrogen ignited. Operations…

The hydrogen release of a defect valve ignited due to an unknown cause. The fire caused the melting of soldered joint with consequence additional release of hydrogen at 6.2 bar, which contributed the…

The event occurred in an alkylation reactor. Due to the rupture of a pipe (probably due to material failure), a power failure took place and the plant was automatically put in hot-stand-by mode. This…

Follow a leak in a seal of a heat exchanger (metal-covered asbestos) a fire occurred in a reforming process. The hydrogen-rich mixture caused spontaneous inflammation. The fire lasted 30 minutes. The…

The accident happened in a refinery unit, constructed ten years before. A pigtail ruptured in a steam reformer for the production of hydrogen, and caused a major fire, which destroyed most of the…

A short circuit occurred in a bus bar system in a transformer building, causing a fire in adjacent switches. This was followed by the tripping out of the three refinery turbo-alternators, cutting off…