What is explosion isolation?
The objective of explosion isolation or decoupling is to protect adjacent parts of the plant and prevent the explosion from propagating.
Why is isolation so important?
In practice, many vessels, silos and devices are connected by pipes, pneumatic conveyors and dust extraction or aspiration lines. If a dust explosion occurs, the flames and pressure waves can spread through these conduits to other parts of the plant. Pre-compression and flame jet ignition exacerbate the explosion in connected vessels. The results is a series of secondary explosions that cause even more catastrophic damage.
An isolation system prevents explosions from propagating and thus minimises the consequences of an explosion. It ensures optimum protection for adjacent parts of the plant.
Active and passive isolation systems
Isolation systems can be either active or passive.
Passive isolation systems react simply due to the effect of the explosion. Their structural design prevents flames and pressure waves from spreading.
Active systems have detectors or sensors which register the pressure rise or flames and trigger countermeasures, e.g. closing a valve.
Different types of isolation
Explosion isolation systems use components such as quench valves and non-return flaps or valves. Chemical extinguishing barriers are also commonly used to smother the explosion flames. Valves and extinguishing barriers are capable of isolating components in both directions simultaneously.
Explosion safety from REMBE® is more than an individual product, it is always a complete solution. There is no other way that we can guarantee the safety of your employees and provide full protection for your plant. This is why venting and isolation must always work hand-in-hand for effective explosion safety – with no ifs and buts.