The causes of dust explosion and fire hazards during manufacturing powder coating

Powder coatings are of the fine organic materials, they can give rise to dust explosions. A dust explosion may break out when the following conditions happen at the same time.

  1. A ignition sources is  present, including: (a) hot surfaces or flames;(b) electrical discharges or sparks;(c) electrostatic discharges.
  2. The concentration of dust in the air is between the Lower Explosive Limit (LEL) and Upper Explosion Limit (UEL).

when a layer of deposited powder coating or a cloud comes into contact with an ignition source such as those listed in above,a fire may break out. A fire within the powder coating system may result in a dust explosion if either burning particles are allowed to enter confined sections of equipment, such as dust collectors, or if burning dust deposits are disturbed.