Unauthorized field modified equipment, drain lines cause control cabinet explosion

A sealed, unclassified electrical control enclosure, part of a listed and certified force-ventilated commercial hydrogen processing unit enclosure, exploded when the equipment manufacturer’s technician pressed the machine stop switch to complete factory commissioning procedure. The technician was forcefully hit by the flying metal panel holding the switch and sustained serious injuries requiring lengthy hospitalization and rehabilitation. Two were hospitalized. Two others were injured.

Unauthorized field modified equipment, drain lines cause control cabinet explosion

A sealed, unclassified electrical control enclosure, part of a listed and certified force-ventilated commercial hydrogen processing unit enclosure, exploded when the equipment manufacturer’s technician pressed the machine stop switch to complete factory commissioning procedure. The technician was forcefully hit by the flying metal panel holding the switch and sustained serious injuries requiring lengthy hospitalization and rehabilitation. Two were hospitalized. Two others were injured.

Liquid Hydrogen Delivery Truck Offloading Valve Failure

First Name
Andy
Last Name
Piatt

A plume of hydrogen gas escaped from the offloading valve of a liquid hydrogen delivery truck while transporting hydrogen to a commercial facility. The plume ignited, resulting in a flash and concussion loud enough to be heard inside the nearby building and to set off the building’s seismic event detectors. A small amount of hydrogen gas continued to escape from the trailer tank and burn until a company specialist arrived to manually shut off a critical valve almost eight hours later.

Hydrogen Cylinder Fire in Laboratory

First Name
Andy
Last Name
Piatt

An employee of an incubator company that was working in a university-owned laboratory facility was checking the hydrogen pressure through the main valve on a hydrogen cylinder. The regulator on this cylinder had not been properly closed. Hydrogen escaped through the regulator and was ignited. The fire was contained in the laboratory and extinguished by the building's fire sprinkler system before fire crews arrived. There were no injuries, and damage estimates were not available.

Over-Pressurization of Laboratory Ball Mill

First Name
Andy
Last Name
Piatt

The over-pressurization of a laboratory ball mill reactor designed for operation under slightly elevated pressures resulted in a serious injury. The apparatus had been routinely operated under argon and hydrogen pressures of 5-10 atmospheres for nearly two years. The apparatus had not been tested for operation at pressures greater than 10 atm.

Electrical Incident Near a High-Pressure Hydrogen Reactor Cell

First Name
Andy
Last Name
Piatt

A hydrogenation experiment was being performed under 60 atm hydrogen, inside a high-pressure reactor cell. The experiment was conducted inside a fume hood and left overnight. The hood caught fire during the night, resulting in fire damage to the fixture, hood, and exhaust duct, as well as water damage to much of the building. Based on the local fire department investigation, the fire started from faulty electrical wiring that was used to provide power for reactor cell heating.

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