Ignition Sources

Playing cards illustrating potential sources of uncontrolled ignition of flammable atmospheres (gases, vapours, dusts or mists) from EN 1127-1Explosive atmospheres — Explosion prevention and protection“:

  1. [A] Hot surfaces
  2. [K] Flames and hot gases (including hot particles)
  3. [Q] Mechanically generated sparks
  4. [J] Electrical apparatus
  5. [10] Stray electric currents, cathodic corrosion protection
  6. [9] Static electricity
  7. [8] Lightning
  8. [7] Radio Frequency (RF) Electromagnetic waves
  9. [6] Electromagnetic waves
  10. [5] Ionizing radiation
  11. [4] Ultrasonics
  12. [3] Adiabatic compression and shock waves
  13. [2] Exothermic reactions, including self-ignition of dusts
Images © Process Safety Integrity 2021


Bowties can be used to identify, evaluate & manage potential ignition sources.

Fire & Explosion Bowties

This is summarised in our Visualizing Explosive atmosphere Scenarios & Tracking barrier Assurance (VESTA™) methodology video below:

For more information on Ignition cards, options & pricing, please contact us.