The incident occurred in a facility chrome-plating metals. At the time of the event, a metal roller was being chrome-plated. A short circuit occurred due to a defective contacting (contact rails) on the rectifier. This short circuit caused a spark to reach the surface of the electrolyte bath, and the spark ignited the hydrogen produced during chrome plating, causing an explosion.Various windows within the company were destroyed, but nobosy was injured.

A leak occurred at a of a liquid withdrawal valve of a liquid hydrogen storage tank. The hydrogen escaped at the flange between the valve body and the upper part of the valve (flange with tongue and groove). 40 kg of hydrogen were lost.The accidental release was due to the use of bolts different from those prescribed. By using the wrong ones (old bolts), the bolt material was able to flow at the specified tighteningtorque. This meant that there was insufficient tightening torque, which led to a leak.

The fire developed on a hydrogen bus during filling, and was detected due to the development of smoke and a smell of burned materials.The power cable of the compressor had overheated. Two are the possible causes: (1) the cable had been wrongly installed or fixed, or (2) the electrical system had caused too high current in the cable. The corrective actions have been:(a) To ship the affected component to the manufacturing company for inspection(b) To replacement of the affected component with a new one. (c) To perform an inspection of the system on all the other buses in function.

The company affected manufactures valves and other hydrogen-storage components, equipment tests. It has offers as well a testing laboratory. The accident happened during testing of a hydrogen tank. A dull bang and a huge pressure wave was felt kilometres away. News report massive damage to the test facility, but a very small fire. Still according to the news, the most probable cause emerging from the investigation is the over-pressuring of the tank due to an erroneous connection of a compressed air hose.

A truck-trailer carrying compressed hydrogen cylinders stopped on an autobahn and reported a hydrogen leaking from the cylinders. The highway was immediately closed in both directions. When the fire brigade arrived, the truck had stopped on a hard shoulder, and the driver had al-ready left his vehicle. A pipe was reported to be leaking hydrogen. Fire-fighters closed a valve on the affexted cylinder group to stop the leak.

[NOTE: One source speak of a hydrogen gasometer, spanish news speak in general of gas, others of ntural gas or coal gas; considering the main product of the factory, it was chosen for this last version, but is is rather doubtful]This incident occurred at a coal gas storage (gasometer) system of a producer of foundry coke. The gasholder was a variable capacity tank, rising in height depending on the amount of gas stored, with a maximum capacity of 24,000 m3.Company sources said that the fire was caused as a result of a spark and a gas leak that was being repaired by the operators.

In 1987, well diggers had drilled a well for water, but had given up on one dry borehole at a depth of 108 meters. According to the source reported in the References, wind was coming out of the hole. When one driller peered into the hole while smoking a cigarette, the so-called wind exploded in his face. A huge fire followed, without smoke, looking bluish at daytime and colour and goldish at night. The crew needed weeks before being able to stop the fire and cap the well. The well remained capped until 2007, when well gas was analysed and revealed to consist in hydrogen with a purity of 98%.

A hydrogen leakage caught fire in the hydrogen compressor area of the continuous reforming unit. The reforming unit and the hydrocracking unit were immediately stopped. The hydrogen flow was cut off, a protective combustion was carried out and the fire was completely extinguished after approximately 20 minutes, with no casualties. The cause of the accident is being investigated.

The fire developed an early morning on a hydrogen bus at a refuelling station for public transport. The fire Department was called to site responding to reports of a fire on the property. A section of the highway was closed as firefighters.According to the bus company release, one bus was destroyed and the dispenser of the hydrogen fuelling station was damaged. The stationary hydrogen storage and the rest of the Explosions were heard and seen from the tanks on the bus that had just been filled.

DISCLAIMER: this event description is unsatisfactory. Details on the system and the real incident evolution are (still) missing. The incident affected a prototype light hydrogen vehicle in a hydrogen research centre of a university. The vehicle was a kind of a four-wheeled scooter. The fire started on the vehicle while being filled. Apparently, the hydrogen storage system was a hydrogen hydride. The site was evacuated and the building isolated from its hydrogen supply. The firefighters attacked the fire with a hose and extinguished it one hour later.