Combustible Dust Explosions
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This shows the third element of the Ignition Triangle: Fuel + Oxygen + Ignition Source . Most examples of a potential ignition source for an explosion are not as obvious as this dramatic example.
Here’s a new term: Hot Work is present in a variety of industries, but it can be extremely dangerous. It’s important to understand the risks that come with this kind of work.
What is “ Hot Work?”
Hot work is work that involves materials with high temperatures.

It includes job tasks that involve potential contact with:
  • Open flames (cutting, welding, burning operations)
  • Electrical friction or impact sparks from air gouging, riveting, drilling, grinding, or chipping
  • Sparks from the discharge of static electricity
  • Hot surfaces like engine manifolds and exhaust systems, brakes, bearings, welding or cutting torches, coils, and resistors
  • Heated gases
  • Internal combustion engines

Furniture maker
Jon Brooks of
New Hampshire
lost his workshop
to a fire in January.
The National Fire Protection Association ’s (NFPA) definition includes flame-producing activities, spark-producing activities, and heat production.

Accidents involving Hot Work occur in various industries, including:
  • Food processing
  • Pulp and paper manufacturing
  • Oil production
  • Fuel storage
  • Waste treatment
  • Construction
  • Grain storage silos & elevators,
  • Food production plants,
  • Chemical manufacturing
  • Rubber, Plastics, Pharmaceuticals
  • Woodworking facilities
  • Metal processing (e.g. Zinc, Magnesium, Aluminum, Iron),
  • Recycling facilities (e.g. Paper, Plastics, Metals), and
  • Coal-powered power plants.

Dusts are created when materials are transported, handled, processed, polished, ground and shaped. Dusts are also created by abrasive blasting, cutting, crushing, mixing, sifting or screening dry materials.
Bill Nagengast, President and Lighting Engineer, Solas Ray Lighting, holds over 20 patents in the lighting industry.
TJ-19 3.30.18