A hydrogen gas holder exploded.It is assumed that there was diaphragm leak in the hydrogen-oxygen electrolytic cell used to produce high purity hydrogen for a pharmaceutical hydrogenation.

Dyestuffs intermediates plant. Hydrogen escaped from leak in pipeline connection to cylinder. Householders nearby evacuated for a short while.

An explosion occurred in a pipe system carrying hydrogen and methane at an ammonia plant. No major injuries have been reported.

A series of explosions occurred on an industrial estate when hydrogen being piped from a road tanker leaked. The tanker containing 80,000 cubic feet of hydrogen was being delivered when the explosion occurred. The tanker and adjacent buildings were set on fire and workshops severely damaged. Cars nearby were also set on fire.

Hydrogen line at ammonia plant sprang a leak which ignited. Fire put out immediately causing no damage.

A number of minor explosions occurred in the interrupter pot on a chlorine cell. No injuries or damage were reported.No previous explosion shad occurred which was taken to indicate that hydrogen concentration within the pot was not normally within flammable limits. The ignition was believed to have resulted from the detachment of the dispersing tray in the pot, the resultant lack of a controlled break in the conductive sodium hydroxide stream leading to the release of sufficient electrical energy to ignite the flammable gas mixture.

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

A road transportation incident. A road tanker of hydrogen overturned and caught fire.

Hydrogen leak from a valve, with delayed ignition and consequent engulfing fire.The bonnet of a 2 inch valve on hydrogen quench line of a lube oil hydrotreater began to leak.The operative conditions were at 3000 psi and 730 degrees F (ca. 200 bar and ca. 390 C). 12 minutes later ignition occurred with fire engulfing the upper portion of the unit. The gas could not be blocked in and the fire burned for over 2 days.

An explosion occurred caused by a leak of hydrogen from a reactor on a fertilizer plant. The blast hurled the head of a hydrogen gas converter 150m and sent it crashing through reinforced-concrete beams in a warehouse roof. The factory supplied hydrochloric acid, ammonium sulphate and urea to other plants. Damage estimated at approximately, 1 million. (1985).