There are 4 main categories of ignition sources. These include: Thermal, Electrical, Mechanical and Chemical.

Some examples of Thermal ignition sources include:

Flames:

  • Blow torch
  • Welding Flame
  • Cigarette lighter
  • Stove
  • Piolet Light

Hot Surfaces

  • Soldering Iron
  • Electric Lamp
  • Cigarette but
  • Hot slag
  • Glowing ember

Some examples of Electrical Ignition Sources

Electrical Current

  • Electric motor
  • Electric Switches
  • Cable Break
  • Spark produced under short circuit or other fault conditions

Electrostatic Charge

  • Pneumatic Conveying of Solid
  • Flow of liquid in pipeline
  • Rubbing of plastic or rubber
  • Liquid spray generator
  • Powder flow

Lightning

  • Direct strike
  • Induced Voltage

Stray current

  • Arc Weld

Some examples of Mechanical Ignition sources

Friction heat

  • Abrasive wheel
  • Bearing
  • Jamming of material
  • Piston movement

Materials Fracture

  • Cracking of metal

Some examples of Chemical ignition sources

Exothermic reactions

  • Vigorous oxidising reactions
  • Exothermic Polymerisation
  • Exposing pyrophoric Substances (sodium metal) to air.

All shall be documented how to avoid.

Keep up good work.

Arpad
exprofessional.com

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