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.

A 9000 gal (34 m3) LH2 storage tank exploded during repair of the vent stack. Few days before the explosion, the tank had been filled with LH2, but later on the hydrogen released and ignited at the tank pressure control system, damaging the vent stack. To perform the required repairs, the tank had to be emptied. To this purpose the vessel was purged with nitrogen gas to display the LH2 by letting it boiling. However, the pressure inside the vacuum jacket increased because of the opening the vacuum valve. This pressure increase eventually led to the catastrophic tank rupture.

A cryogenic hydrogen laboratory had a power outage. The cryogenic hydrogen storage was no longer being cooled, therefore temperatures and pressures within the storage system started rising. There were several relief devices on the system, one with a set point of 150 psi (approximately 1 MPa) and a second at a set point of 165 psi (1.1 MPa). The system was monitored by site personnel so that when the hydrogen pressure increased to 120 psi (approximately 0.5 MPa), a manual vent was opened. However, the manual vent rate was not able to control the rising pressure.

A fire broke out on the worlds first hydrogen carrier vessel shortly before setting sail from Australia to Japan carrying the worlds first international shipment of liquefied hydrogen. A flame was seen coming from the gas combustion units exhaust on deck. The unit was immediately shut down and isolated before the crew implemented the fire prevention response plan.The event occurred after the ship had loaded liquefied hydrogen, at berth in the harbour, during an attempt to burn excess boil-off gas from the liquid hydrogen cargo tank.

The tanker truck was carrying nearly 13,000 gallons of liquid hydrogen. it hit the base of a light pole in the parking lot of a local grocery store as the driver was attempting to turn around. Hydrogen gas then began leaking out of it. This resulted in a valve on the truck to become damaged and could have caused the liquid hydrogen to be released from the truck, a very serious situation for nearby residents and businesses. Nobody was physically harmed by the incident.

The truck overturned and lost vacuum insulation. The hydrogen boiled and vented, but there was no ignition. The potential for fire or explosion, however, led to precautions that did cause considerable disruption: the interstate highway where the accident occurred was closed and nearby homes and businesses were evacuated.

the commercial vehicle was traveling when the two-person crew noticed what appeared to be smoke emitting from the tanker trailer. The crew called 911 and safely pulled to the side of the road Fire brigade, law enforcement and Department of Transportation personnel then escorted the vehicle to a safe location near a University main campus. The hazard response team entered in contact with the transportation company and left the tanker depressurizing and off-gassing till it was safe for it to further travel.

The incident occurred at a fuel cells manufacturing plant. The tanker was preparing to transfer liquid hydrogen to the company hydrogen bulk storage tank. During backing, it impacted an industrial building, causing a hole in the tank, with consequent leak and ignition. When the City fire brigade arrived on scene, the hydrogen gas was still escaping from the leak feeding the fire. They let the fire burn out and kept dousing the tanker till Saturday to reduce the temperature and to minimise possible the risk of explosion.

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 tank to a tank alongside the business, when the hydrogen vapour were vented and ignited. Witnesses spoke of a 'large explosive noise' (see references). The emergency services closed the traffic and evacuated several businesses, schools and homes for a few hours.

The truck was carrying 25 m3 of liquid hydrogen and was parked in the parking lot of a road restaurant. The hydrogen escaped through the safety devices of the tank and then dispersed (the weather was wet and there is fog). Technicians from the charter company degassed the tank until the leak stopped, then escorted the truck to a technical centre. A crack in the inner tank causing a pressure build-up could be the cause of the accident.