HIAD Event Initiating System: Hydrogen System Initiating Event

This incident occurred at a linear alkylbenzene manufacturing plant. It affected dehydrogenation reactor of normal paraffin, during the operation of catalyst exchange in the reactor. This is usually…

Hydrogen leakage occurred on a pipe flange in an ammonia synthesis unit. A fire started immediately, which was taken under a control before the arrival of firefighters.

A fatality occurred after a flexible hose used to transfer hydrogen to the catalytic reformer was over-pressurised and caught fire.On June 9, 1997, No. 1 and No. 2 hydrogen modules were connected to…

A small quantity of hydrogen gas leaked out of a pipe and caught fire. The danger of an explosion was averted by the safety crew who put out the fire and switched the gas flow to an alternative line.

Two employees were performing works on hydrogen piping (H2) in the chlorate production unit of a chemical plant when an ignited leak of H2 occurred. The operator initiated the emergency plan and…

Weld failure caused a fire involving a hydrogen pipe at a fertilizer ammonia plant. Source of ignition was autoignition.

Fire broke out along a transition corridor combining several underground pipelines transporting hazardous substances, including hydrogen, kerosene and ethylene oxide. The fire was brought under…

Excavation work was performed nearby a buried pipeline of gaseous hydrogen. The excavation machine hit the pipeline causing an under-expanded jet fire. No injuries. The excavation machine was burnt…

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…

Explosion and fire in gasholder storing hydrogen in thermal black plant.

A fire occurred on a plant. The fire resulted from an escape of liquid hydrogen from a joint between an isolating block valve and a relief valve on one of the separation column preheater. The…

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…

Fires and chain reactions involved more than 100 cylinders of hydrogen or other gases in a storage system. The fire lasted for more than 5 hours and the neighbourhood has been affected by flying…

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…

A fire broke out following a hydrogen leak on the cyclododecane unit in a chemical plant. A plume of smoke became visible outside the site. The fire was brought under control by putttng the unit in…

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…

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.