In the petrochemical and the gas industry, workers are often exposed to explosive and flammable atmosphere.
A little spark in such locations can have fatal consequences & cause damage to life and property. Even the atmospheric humidity may influence electric discharge. In dry environments the effect of static charges can be highly destructive. An appropriate antistatic yarn used in the protective clothing prevents built up of static electricity.
Test method for measurement of surface resistivity (for surface conductors only). Surface resistance tested shall be less than or equal to 2.5 X 109Ω
Test method for measurement of charge decay (suitable for core and surface conductors). Half Decay Time - t50 < 4 seconds and/or Shielding factor - S > 0.2