Electrostatic charging results from an excess or deficiency of electrons on the surface of a substance or body. This phenomenon occurs particularly in areas where non-conductive or poorly conductive substances are involved in friction or separation processes, such as unwinding paper or fabric webs from rolls, walking on insulating surfaces, filling liquids or transporting powdery substances in pipelines.  

EN 1149-5 in conjunction with EN 1149-3

The garment is marked with this pictogram.

The extent to which a garment becomes charged depends, among other things, on the material, speed and humidity. To avoid this static charge or to dissipate it immediately, conductive threads are either woven into the fabrics of protective clothing or a certain proportion of conductive fibres is spun into processed threads.  

In potentially explosive atmospheres, protective clothing and persons must not become electrostatically charged. Here, electrostatically dissipative protective clothing is used in combination with dissipative safety shoes on dissipative, earthed floors. The protective clothing must be worn completely closed and tight-fitting. It must not be put on or taken off in potentially explosive atmospheres

EN 1149 specifies test regulations for electrostatically dissipative protective clothing to prevent ignitable discharges. The assessment is carried out according to EN 1149-3:2001.

Possible use of protective clothing according to EN 1149:

  • Chemical/pharmaceutical industry
  • Refineries
  • Tank farms
  • Mixing plants
  • Paint shops
  • Mills
  • Mixing and conveying plants
  • Emptying of silo semitrailers