Stages of a Fire

Early detection is crucial to minimise damage and save life. Fires are devastating events which can occur at any moment. They go through different phases.

In general, there are 5 stages to a fire.

1. Warm-up stage (Pre-combustion)

A fire goes through a warming-up phase before combustion occurs. During this stage, the temperature in the affected area begins to increase.

2. Initial combustion and ignition stage

In the initial stage of a fire, an ignition source is responsible for its development. This phase is detected by:

• Smoke detectors can be crucial in detecting smoke and a fire before it starts. For Fire Alarms, contact https://isefireproducts.co.uk/fire-alarm-systems/
• Heat detectors can be used to detect sudden temperature changes, especially in kitchens and other areas that generate heat.
• Flame detectors can detect the early stages of flame development by detecting ultraviolet and infrared light. This provides an additional warning that a fire is present.

3. Growth and Spread

The fire spreads and grows rapidly in this phase. Suitable detection systems are:

• Multidirectional temperature and fire detectors: These devices are advanced and can detect the direction, behaviour and temperature of smoke and heat. This allows for more accurate detection.
• Centralised alarm systems. These systems can be connected to sensors located throughout the building, and they can automatically alert emergency services or authorities.

4. Stabilisation phase: Control and Containment

Firefighters and emergency response teams are working hard to contain the fire.

5. Elimination of danger

Even when the fire has been put out, detection systems are still crucial.

• Gas monitoring systems are available to detect hazardous gases such as carbon dioxide that were released during a fire.
• After-fire assessment systems. These systems assist response teams in assessing the condition of the building and ensuring that it is safe to occupy.