HIAD Event Initiating System: Hydrogen System Initiating Event

Iron powder from non-conducting polypropylene IBC was added to EDTA solution at 60 C in reactor. Hydrogen given off, ignited by static.

Localized corrosion of a FCCU (Fluid Catalytic Cracking Unit) feed Hydrotreater recycle hydrogen line by-pass around a hydrogen pre-heat exchanger led to an explosion and fire.The failed part of the…

Employee used a small industrial vacuum cleaner on an unnamed process. During this process, hydrogen gas built up from a reaction between sulfuric acid and aluminum swarf. When the vacuum cleaner…

The accident occurred during the first phase of the batch synthesis of tricarbonyl compound (methylcyclopentadienyl) manganese (TMCM), while the reaction mixture in the reactor consisted of more than…

The explosion involving hydrogen gas knocked a 36-by-70-foot hole in the roof of the plant. Officials said the gas was formed when chemicals mixed in the plant's waste treatment unit.

An explosion followed by fire occurred in the hydrogen filling unit of chemical plant for the production of dyes and pigments.

An employee was attempting to re-weld a lifting point on a brazing furnace cover. He was using a tungsten inert gas (TIG) welding machine to build up an attachment point on the cover when an…

The vent occurred in the ammonia production unit. A minor leak had been detected in a flange on the piping of the ammonia synthesis loop (operating at 250 bar). The company called a specialized…

Coke oven gas was released from a pipeline during maintenance works. The pipeline was supplying the burners of the coke oven with coke oven gas. The original reason for the so-called gas-stop was…

At 11:15 pm, an explosion followed by fire occurred in the vicinity of the measurement transformer on an isolated 90,000 V electrical oil transformer at a plant manufacturing technical polymers.…

A hydrogen plant exploded, throwing debris for tens of metres and badly damaging the plant. The two workers in the plant at the time were not seriously injured. The plant reportedly had a capacity of…

An explosion and fire occurred at a hydrogen production plant serving the hydrocracker and the diesel hydroteater of a nearby refineryNo injuries were reported among the employees.According to the…

A mixture of hydrocarbon and hydrogen leaks from hydrogenation unit of a refinery. The cloud explodes. The leak was caused due to corrosion of a carbon steel pipe at a bend, which was one eighth…

Gaseous hydrogen leaked from an oil pump part of the filling and conditioning system in a industrial gases production plant. The released hydrogen ignited and exploded. The cause has been a human…

Explosion within a blast furnace occurred at the plant manufacturing iron. The event occurred at one of the blast furnace of the plant, which exploded. The explosion was so powerful that the entire…

The accident happened in a low pressure methanol plant, commissioned in summer 1971 . A 6 in. pipe, below the methanol synthesis gas compressor inter-stage relief valve, failed releasing hydrogen-…

An explosion occurred involving a Microbiological Anaerobic Chamber of approximately 2 m3 capacity, containing an explosive mixture of hydrogen and air. A fire followed the explosion, but was rapidly…

A hydrogen gas holder exploded.It is assumed that there was diaphragm leak in the hydrogen-oxygen electrolytic cell used to produce high purity hydrogen for a pharmaceutical hydrogenation.

In a pharmaceutical company classified Seveso upper-tier establishment, a deflagration occurs at the end of a hydrogenation reaction involving a chemical raw material, acetic acid, water and a…

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…