HIAD Specific Application Supply Chain Stage: Hydrogen As Process Gas

An isomerization unit of a refinery was affected. The release was caused by the mechanical failure of one of the two compressors working in parallel at a pressure of 20 bars, conveying the gas…

The laboratory works with soil bacteria that cannot survive in the presence of oxygen. As a result, research work is conducted inside a plastic chamber in which the chemical constituents in the air…

A leak and fire occurred in a hydrogen compression section of a hydrocracker.

A mixture of mainly carbon monoxide and hydrogen was released from a pipeline transferring process gases in a not further specified unit of a chemical plant, generating a flammable mixture which…

The non-destructive analyses performed in a refinery revealed material degradation of the steel components. The opening of the equipment confirmed the diagnostic : blisters were visible on metal…

An operator noted a loose tube sheet flange stud on a high temperature, high pressure heat exchanger in an hydrodealkylation unit.The stud was found to be cracked through. Analysis proved to be made…

The incident occurred during a temporary shutdown of the distillate hydro-treatement unit. The crude oil distillation units main column overhead product was pumped to a gasoline storage tank via the…

An explosion or fire occurred in a hydro-treatment unit which was processing Fluid Catalytic Cracking feedstock. It was caused by a failure in a pipe downstream from a separator, resulting in the…

A series of explosions at an oil refinery 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…

The utility production facilities (electricity, water, air, and steam) at a refinery were isolated from the power grid and switched to two turbine generators in anticipation of a storm. At 9:50 p.m…

A vertical cylindrical fired heater was used on the charge to a hydrodesulfurisation reactor. The flow was two phase at the heater inlet (hydrogen and hydrocarbon). The distribution of flow to the…

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…

The fire developed on one of two naphtha crackers The rupture of the reactor made that the hydrogen, petroleum products and the pyrophoric catalyst came outside the reactor. The mixture immediately…

The event occurred at the hydrogenation unit of a pharamceutical company. 145 kg of hydrogen were released the atmosphere at the gas circulation pump, due to a maintenance error . A…

Hydrogen leak from a valve, with delayed ignition and consequent engulfing fire.The bonnet of a 2 inch valve on hydrogen quench line of a lube oil hydrotreater began to leak.The operative conditions…

While de-plugging a cooling circuit, a blockage suddenly released, causing a heavy movement of a flexible hose connected to the system. The flexible hose hit several small pipes and one employee…

The event affected the hydrocracker unit. A sudden release into a cracker compressor flare header destroyed a safety relief valve and damaged a sight glass on a liquid collection pot. As a…

A leak occurred on a line connecting the hot separator to the cold separator of a refinery diesel desulfurization. The alert was given by the activation of the fixed H2S detector. The 30 bar pressure…

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…