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 in hydrogen compressor, due to rupture of 4 inch suction pipeline to the compressor. "Hydrogen...exploded and continued to burn until it was extinguished".3 fatalities.

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 crew working in the area. Two were declared dead at the scene and a further two later in hospital.The ensuing fires were quickly contained and extinguished, but caused offsite traffic within several blocks to be stopped.As a precautionary measure, a second reformer unit was shutdown pending the investigation. Fire officials cited higher than normal line pressures just before the blast.

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).

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 relief valve had been under repair and was being brought back onto line when the incident happened.An investigation team was appointed. The first task was to confirm that it was safe to resume operation in the section of the plant.

A fire occurred in a hydrogen and catalyst loading lines of heavy oil unit. The most likely cause was that a hydrogen purge pipeline failure allowing hydrogen to escape. This mixed with hot oil bringing the temperature to approximately 825 degrees F (441 degrees C), i.e. above the auto-ignition temperature.