Methods of instrumental explosion protection (active and passive explosion protection)

16 September 2021

There are four main methods of instrumental explosion protection to reduce thedestructive effects of an explosion and prevent repeated explosions. These include:

  • explosion resistant shell,
  • explosion venting,
  • explosion suppression
  • explosion isolation.

An explosion resistant shell is a passive explosion protection and implies the design of process equipment with the expectation of maintaining the integrity of its shell in case of explosion (resistance to the maximum explosion pressure).

Explosion venting is a passive explosion protection and implies the presence of a device for venting the excess pressure and explosion products into the environment – an explosion venting device (explosion venting panels, flameless explosion venting devices). When using explosion venting devices, excess pressure does not reach values that pose a threat to the integrity of process equipment.

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Explosion suppression is a method of active explosion protection, which implies the presence of technical devices combination for early explosion detection (pressure and optical radiation detectors) and suppression at the initial stage by dispersion of fire extinguishing agent (HRD containers) into the equipment.

Control on explosion transmission by its isolation. This method involves the use of a barrier to prevent the propagation of the flame front and overpressure into adjacent pieces of process equipment. Explosion isolation can be either active (use of detection system and HRD containers, valves with pneumatic or electric drive) or passive (valves actuated by overpressure and air flow).

You can find more information about explosion protection methods and technicalfeatures of explosion protection equipment in the Product Catalogue section.