Full jet

A full jet is the bundled delivery of a liquid . Full jets are generated by nozzles through which the liquid is passed under pressure.

Full jet in fire fighting

When fighting fires , the full jet is used by the fire brigade to selectively irrigate a source of fire. To generate a full jet with a multi-purpose jet pipe, the shut-off device is usually turned in the direction of the jet pipe outlet.

Areas of application

Normal case: Class A fires
Special case: Class C fires

Advantages of the full jet

Large throw (approx. 30 m with a B multi-purpose jet pipe without mouthpiece and 5 bar pressure)

High impact force (mechanical effect), therefore great penetration depth into the fire

Disadvantages of the full jet

Less cooling, as less water is caused to evaporate through the bundling
Higher water damage, therefore targeted and metered water release makes sense
Risk of dust explosion if the extinguishing water jet hits finely divided, solid, flammable substances

practice

In the practice of fighting fire in buildings, the disadvantages of the full jet predominate, especially the resulting water damage. Therefore, if possible, fires are only fought with a full jet if the resulting damage is minor (e.g. forest fires) or if the water damage can no longer exceed the fire damage (full fire with the impossibility of an internal attack).

literature

Lothar Schott, Manfred Ritter: Fire Brigade Basic Course FwDV 2 . 20th edition. Wenzel-Verlag, Marburg 2018, ISBN 978-3-88293-220-1 .