Fire & Explosion Hazards

A variety of fire and explosion hazards are associated with the use of lasers. Appropriate personnel should enclose high-pressure arc lamps and filament lamps or laser welding equipment in housings that can withstand the maximum pressures resulting from lamp explosion or disintegration. The laser target and elements of the optical train that could shatter during laser operation must also be enclosed.

To reduce the risk of fire hazards, potentially flammable items located near the operating field should be eliminated or kept wet if elimination is not possible.

Fire extinguishers must be present and located somewhere with easy access. The LSO should establish rules for placement and periodic inspections. Water for putting out non-electrical flames should also be immediately available when using laser systems. Finally, ensure that high pressure flashlamps, arc lamps, and filament lamps are enclosed in housing that can withstand the maximum explosive pressures resulting from lamp disintegrations.

Enclosure of Class 4 laser beams and terminations of some focused Class 3B lasers can result in potential fire hazards. Plastic materials can be used as an enclosure material but may not be the best choice due to the potential for toxic fume release and flammability following direct exposure. Flame-resistant materials and commercially available products specifically designed for laser enclosures are good options.

To learn more about Laser Safety visit our Laser Safety Online Training web page.