21-Static Control#

Learning Objectives:

  • Understand the concept of inerting

  • Understand the concept of electrostatic charging, relatation, and discharge

  • Understand the concept of static control

  • Understand basics of electrical classification and explosion proof equipment

Inerting Approaches#

Inerting is the process of replacing the atmosphere in a vessel with an inert gas (nitrogen, carbon dioxide, etc). This is done to prevent the formation of flammable/explosive mixtures. There are multiple approaches to purging and inerting:

  • vacuum purge (removing the atmosphere from the vessel and replacing it with an inert gas in stages; stages used to prevent the container from collapsing)

  • pressure purge (replacing the atmosphere in the vessel with an inert gas by pressurizing the vessel, also completed in stages)

  • sweep purging (replacing the atmosphere in the vessel with an inert gas by flowing the inert gas through the vessel)

  • siphon purging (replacing the atmosphere in the vessel with a liquid then filling with an inert gas)

  • combination of the above

ESD and Static Control#

Further info here:

Download pdf of lecture freeform here: clint-bg/safetyinjc