Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… the rest of the acid had not been drained from the boiler. Hydrogen emitted by a metal + acid reaction was the cause of this accident. An employee wound up in …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… the reaction of the process in the tank releases hydrogen. The fire propagated to the plastic components above … work had been allowed by an intervention permit and was equipped with protections designed to limit the …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… using the mercury process.The emergency electrical system was activated, though restoring the external supply voltage … mix of 500 kg of chlorine and an unknown amount of hydrogen accumulated inside the low-pressure chlorine …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… discovered in the vicinity of a circulation pump. The pump was switched off and a routine tightening operation of the stuffing box packing was executed. During the switching on again of the … an abrupt depressurization via the pump took place. This was due to the fact that double gate valve on the pump's …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… occurred in an electrostatic precipitator whilst it was being accessed for maintenance. The explosion caused an … minor injuries. The sequencing of the shutdown tasks was fundamentally flawed as the spades were introduced … to develop as the main constituents of coke oven gas are hydrogen, methane, carbon monoxide etc. The exact source of …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… An employee was preparing a batch of glycol stearate emulsifier in a … of product, the quality control lab reported that the pH was too high and the product needed to be bleached. When the … borohydride reacted with the sodium chlorite, producing hydrogen gas which flashed into the employee's face. He was …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… exothermically reacted with the aluminum dust to form hydrogen gas. The top of the barrel deformed and glowed red. Smoke was observed and an employee sounded a vocal alarm. The lid …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… separator of a refinery diesel desulfurization. The alert was given by the activation of the fixed H2S detector. The 30 bar pressure line contained essentially hydrogen with a high concentration of H2S. The operators … unit and isolated the leak in about ten minutes. The line was pierced at a bend at 135 C following a bend at 90 C. The …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… of tri-(nonylphenyl) phosphite (TNPP or TNPA). This tank was typically stirred and maintained at 45C. However, the … acid corroding the steel on the container caused hydrogen to form. The relatively slow hydrolysis reaction was no doubt catalysed by metal particles (rust, etc.). A …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… three gas extractors of the coke process line. Main cause was displacement of a flange which allowed the entrance of flammable mixture gas (methane, carbon monoxide hydrogen and benzene) which ignited probably due to … report (see references) total quantity of gas released was 62 400 m, consisting of 11,7 t CH4, 0,98 t C6H6, 5,1 t CO …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… a gas leakage (approximately 70% hydrogen, 21% nitrogen and the rest carbon monoxide and other … in the carbonization workshop cleaning tower. The leakage was reported to the plant leader, who issued the request to … pressures in the tower the high-speed by which the gas was released, and the fact that that the rubber is an …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… to supply coke gas fuel to the furnace, flammable liquid was unexpectedly released and ignited. The flammable material consisted of methane, hydrogen, carbon monoxide and solid coke. The workers were …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… coupling during a controlled test refuel. The test was attended by the station operators staff. The leak occurred as the temperature was decreasing (the hydrogen is pre-chilled to between -33oC and -40oC prior to …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… crude oil distillation units main column overhead product was pumped to a gasoline storage tank via the straight run … oil distillation unit main column overhead product line was opened before the line to tank was closed.Hydrogen gas at a pressure of 30 bars consequently reached …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… (WARNING, UNCLEAR IF H2 WAS INVOLVED)The explosion occurred in a chemical reactor … charge. 2. Auto detonation of a mixture oxygen and hydrogen produced by the corrosion of a part of the axis of … that had been damaged during maintenance. The building was partially blown, especially in the upper part, and …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… It slipped 150 m, before several 200 litre cylinders of hydrogen caught fire and set the truck on fire as well. The police stated that it was a large fire with detonations. The 400 gas cylinders were … hours. The driver cabin burned completely. The damage was estimated at 200,000 Euros, not including the damage to …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… after a technical shutdown of 4 days. When the production was resumed and the syngas compressor restarted 14 hours … later, a jet-fire occurred. The Internal Operation Plan was launched and the fire immediately extinguished.The cause … the gas upon starting up the synthesis process. The high hydrogen concentration of the synthesis gas explains probably …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… reformer unit caused by a rupture to an 8 inch naphtha and hydrogen feed pipe. The large number of injuries was due to the close proximity of a construction crew working … stopped.As a precautionary measure, a second reformer unit was shutdown pending the investigation. Fire officials cited …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… A hydrogen leakage occurred in the ammonia workshop of a plant … and fertilizer (classified SEVESO high threshold). It was detected by an operator in charge of safety checks, by … the piping (30 bar) to repair it. The ammonia workshop was also partially shut down. The operator closed the section …
Last Updated Fri, 04/18/2025 - 19:40
HIAD Event
… to perform an on-stream repair of the valve. This solution was chosen because of for the limited extents of the leakage … escape of a jet of a gaseous mixture of unknown amount of hydrogen and nitrogen at 250 bars. The escaping mixture …
