Explosion at styrene plant during start-up. A manhead flange failed in a light oil hydrogenation unit releasing 30 kg of hydrogen in a compressor shed. Ignition occurred in 10 to 15 secs. Significant damage to building and structures. Window damage to 365 m. According to the H2TOOLS entry, the investigation team concluded that hydrogen gas was released through a failed 19-inch diameter gasket and ignited under the roof of the compressor shed where it was partially confined.

A leak occurred on a 4 inch hydrogen main gas line which ran along a pipe bridge at the east end of a first stage compression plant building, ignited.The source of ignition was hot welding sparks arising from work being carried out by contract personnel whilst installing a new chlorine line above the hydrogen main on the pipe-bridge.Before the welding work was carried out, an explosivity test had been carried out in the area and a nil result had been entered on the work permit.An investigation into the incident found that the removed section of the hydrogen main revealed an elliptical hole 2 c

A fire occurred at a refinery hydrocracker plant involving a gauge glass and hydrogen gas oil.

A fire occurred in a pipe trench containing about 50 pipelines.The pipelines were carrying a wide variety of hydrocarbons from crude oil to residuals. In addition, there were lines with steam, fuel gas, hydrogen, amine solutions and sour water pipelines. Within 10 minutes of the fire, an explosion occurred followed by larger explosions in the pipe trench as pipelines ruptured. The fire spread to a diesel tank. The refinery had to be taken offline. The fires were extinguished after 12 hours. A lagging fire was concluded with excessive oil in the trench.

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 degrees C after shutdown for maintenance. There was no structural damage.

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 piping. The ignition was not immediate after rupture.

A small quantity of hydrogen gas leaked out of a pipe and caught fire. The danger of an explosion was averted by the safety crew who put out the fire and switched the gas flow to an alternative line.

A high pressure reactor ruptured during a catalyst activation operation. A gaseous stream of hydrogen and light hydrocarbons was released and spontaneously ignited. The unit was immediately shutdown and depressurized. The fire was limited to the vicinity of the ruptured reactor and was extinguished within twenty minutes by onsite emergency services.

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 caught fire in the air. The fire was brief but intense. The fire reduced ethylene production by 40% for two weeks. The release species were: benzene: 12 tonnes; hHydrogen: amount unknown; catalyst : amount unknown.

The soldiers of the Royal Prussian Air Ship Division stored large amounts of hydrogen gas. They kept some 1000 cylinders in a shed. On 25 May 1894 about 400 of them burst without apparent reason. Damage was considerable.