HIAD Causes: Material/Manufacturing Error

The event occurred at the flanges on the outlet of a desulfurization reactor, which was working under about 300 degrees C The flanges and bolts were cooled down by a large amount of rainwater which…

Minor leak in the break-away coupling for 35MPa dispenser of a refuelling station for buses.The leak developed in the break-away coupling during a controlled test refuel. The test was attended by…

Hydrogen leak occurred during a delivery of hydrogen at an automotive supplier. Rescue deployed a curtain of water and evacuated 82 employees from several companies within a radius of 50 m. The…

A leak occurred in a vehicle carrying 218 cylinders of hydrogen. The contents of 28 cylinders, 90 m of hydrogen, escaped. A security perimeter was set up with stop of the road and rail traffic.

A leak occurs on a hydrogen gas transport at a flange of 9 cylinders of 80 m. The producer of these cylinders decides to let it leak. No consequences to report.

hydrogen gas released from vent stack following failure of relief valve in pressure relief system on bulk hydrogen installation, no ignition and no injuries.

A hydrogen and fuel cells bus experienced a hydrogen detection alarm in a city centre. This triggered the evacuation of the immediate surroundings and the towing of the vehicle to the maintenance…

Leak of hydrogen at a refinery which may have been caused by a faulty compressor.

A sudden failure occurs on a hydrogen line of a refinery desulfurization unit. The equipment is located between a hydrogen compressor and its overpressure protection valve. It is isolated…

Malfunctioning of the non-return valve of the hydrogen compressor has caused the pressure between the hydrogen bottle and the compressor to rise to the maximum allowed pressure of 275 barg. As a…

A factory was evacuated after a tank began leaking hydrogen. No injuries were reported

Compressed hydrogen was released from a storage system due to the rupture of a Bourdon-type pressure gauge.

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…

The rupture disk installed on a liquid hydrogen tank failed, in a plant producing organic chemicals, during the weekly shut down. The hydrogen ignited at the exit of the exhaust chimney. The fire…

A liquid hydrogen leak occurs in a steel plant on a 42000 l tank of liquid hydrogen. A sealing coupling was installed to stop the leak.

A hydrogen feed line ruptured without igniting at an oil refinery.

A leak occurred on the safety valve of a train wagon transporting liquid hydrogen wagon. The train was composed of 10 wagons. The train was stopped on the railway several hours to allow…

Near the end of the process of filling a gaseous hydrogen tube trailer at a liquid hydrogen transfilling station, a safety pressure-relief device (PRD) rupture disc on one of the tube trailers ten…

A joint failure allowed a mixture of hydrogen and nitrogen into the atmosphere.Failure of double cone joint on waste heat boiler in synthesis loop caused release of synthesis gas at 28.7 MPa and 170…

A hydrogen leak alarm was received in the control room from the reformer of the hydrogen plant of a chemicals manufacturing facility. The reformed was depressurised and the leak stopped. The leak was…