There are six main types of fire extinguishers in Marine Fire Fighting Equipment. They are briefly explained below:
ABC Powder Fire Extinguisher is a multi-purpose extinguisher and is commonly found everywhere.
It sprays very fine chemical powder composed of mono-ammonium phosphate. It acts as blanket and suffocates fire.
Carbon Dioxide Fire Extinguisher is a cleanest type of extinguisher. It leaves no residue, which means you don’t have to clean up.
It removes oxygen from fire, thus suffocating it of oxygen.
Wet Chemical Fire Extinguisher is specifically used class K fires involving cooking media.
This extinguisher has potassium solution that effectively launches two-pronged assaults on fire
First, a liquid mist is sprayed to cool down fire. Then, the potassium solution forms a thick soap like layer on the liquid to prevent re-ignition.
Water Mist Fire Extinguishers is the most versatile among all fire extinguishers and uses new technology.
It releases microscopic water molecules to fight fire at different levels. When it sprays water in microscopic fog-like form, the level of oxygen is dropped and fire is suffocated.
Foam Fire Extinguisher sprays a type of foam that expands when combines with air and forms a blanket for fire.
It has a cooling effect as this foam is mixed with water.
These extinguishers are best for Class A and Class B fires.
Clean Agent Extinguisher is a type of gaseous fire suppression. It comes in liquid form, but when sprayed in air, it becomes gaseous form.
It is non-conductive and can be used in human presence. It leaves no residue.
Apart from it, Clean Agent Extinguisher has short atmospheric lifetime, making it eco-friendly.
Figure 8: Types of Fire Extinguishers