A tank receives, after a negative reactivity test with the bottom supernatant of the tank, 20 m of methyl hydro-dichloro-silane, then 24 m of a mixture of oil and tar (negative reactivity test) and 10 m of a Tar mixture (no reactivity test). Simultaneously, the operator feeds an oven by pumping into the tank. A reaction appears 24 hours after these discharges, filters clog up, the tank overflows, then the reaction stops. The management states that there is no danger; 15 days later a sudden release of hydrogen occurs with a projection of solid polymer within a radius of 25 m.

Hydrogen release and explosion due to a leak in a high pressure hydrogen storage tank, during first start-up of plant.

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.

An explosion occurred on a tank truck whilst unloading hydrogen into a storage tank. The explosion occurred near the discharge valve of the truck injuring two people and starting a fire at the point where the hydrogen was leaking from the damaged valve.The fire was too big for the fire brigade to keep it under control. The fire could be extinguish only by approaching the site and manually closing another valve. Both the stationary tank and the tank on the truck were not affected by the fire.

During the start-up of a propylene hydrogenation reactor, very high temperatures were generated in the catalyst bed. At the time, propylene and hydrogen were being fed to the reactor which contained a granular catalyst. The temperature rose rapidly, and the hydrogen supply valve tripped at 176 degrees C.

Discharge pressure of a hydrogen compressor on a chloride plant fell to alarm level without any prior warning and simultaneously three bumps were heard.Smoke was seen coming from the hot motor bearing and the machine had to be stopped locally as it had not tripped.

A road tanker was being loaded with liquid hydrogen from a 15,000 gallon storage tank, when fire broke out after 1 inch rupture disk failed, ignition source was a loose connection in down stream piping. The ignition was not immediate after rupture.

A high pressure reactor ruptured during a catalyst activation operation. A gaseous stream of hydrogen and light hydrocarbons was released and spontaneously ignited. The unit was immediately shutdown and depressurized. The fire was limited to the vicinity of the ruptured reactor and was extinguished within twenty minutes by onsite emergency services.

A large explosion happened in the contractor amenities area. The explosion was thought to be caused by an explosive mixture of air and hydrogen which existed in the pipes. The force of the explosions in the pipes has then caused consequential failures of fittings and joints at B and C storage tanks. This released hydrogen into the storage shelter which subsequently ignited.

Hydrogen escaped when a venting valve was opened for the inspection of a cap. The escaped hydrogen caught fire, resulting in the death of 4 people, injuries to others 3 and damages to the plant.