This makes foam extinguishers suitable for environments where both solid materials and flammable liquids are present.<\/p>\n
Where Can Foam Fire Extinguishers Be Used?<\/h2>\n
Foam fire extinguishers are commonly installed in:<\/p>\n
- \n
- Offices<\/li>\n
- Schools and colleges<\/li>\n
- Retail premises<\/li>\n
- Warehouses<\/li>\n
- Hotels<\/li>\n
- Residential blocks (common areas)<\/li>\n
- Premises storing flammable liquids<\/li>\n<\/ul>\n
They are often selected where a single extinguisher needs to cover more than one fire risk.<\/p>\n
Where Can Foam Fire Extinguishers Not Be Used?<\/h2>\n
![\"Foam](\"https:\/\/fire-risk-assessment-network.com\/blog\/wp-content\/uploads\/2018\/05\/Foam-Extinguisher-300x300.jpg\")
Foam fire extinguishers must not be used on:<\/p>\n- \n
- Class C fires \u2013 involving flammable gases such as propane, butane, or methane<\/li>\n
- Class D fires \u2013 involving combustible metals such as magnesium or aluminium<\/li>\n
- Class F fires \u2013 involving cooking oils and fats (e.g. chip pan fires)<\/li>\n
- Live electrical fires, unless the extinguisher is specifically tested and certified for electrical use<\/li>\n<\/ul>\n
Standard foam extinguishers are water-based and may present an electrocution risk if used on energised electrical equipment. Always isolate the power supply first if it is safe to do so.<\/p>\n
How Do Foam Fire Extinguishers Work?<\/h2>\n
Foam extinguishers work by:<\/p>\n
- \n
- Creating a blanket over the fire, separating the fuel from the oxygen<\/li>\n
- Cooling the burning material, reducing the risk of re-ignition<\/li>\n<\/ul>\n
When used on flammable liquid fires, the foam floats on the surface, sealing vapours and suppressing flames without splashing the fuel.<\/p>\n
Cooling and AFFF Foam Action<\/h3>\n
Foam fire extinguishers work in two principal ways:<\/p>\n
Firstly<\/strong>: Being chiefly water-based, they help to cool the burning material, reducing the temperature below ignition point.<\/p>\n
Secondly<\/strong>: Aqueous Film Forming Foam (AFFF) creates a film over the surface of the fire, which separates the fuel from oxygen and suppresses flammable vapours \u2014 particularly effective on liquid fires.<\/p>\n
This dual action helps reduce the risk of re-ignition.<\/p>\n
How Do You Identify a Foam Fire Extinguisher?<\/h2>\n
You can identify a foam fire extinguisher by:<\/p>\n
- \n
- Its red body with a cream-coloured label, marked \u201cFOAM\u201d<\/li>\n
- An accompanying extinguisher ID sign stating its approved fire classes<\/li>\n<\/ul>\n
Are Foam Fire Extinguishers Safe for Electrical Fires?<\/h2>\n
Most standard foam fire extinguishers are not suitable for use on live electrical equipment, as they are primarily water-based.<\/p>\n
However:<\/p>\n
- \n
- Some modern foam fire extinguishers are independently tested and certified for limited electrical use up to a specified voltage<\/li>\n
- This will always be clearly stated on the extinguisher label and in the manufacturer\u2019s certification<\/li>\n<\/ul>\n
Never assume electrical suitability. Always check the extinguisher label or seek professional fire safety advice before use.<\/p>\n
What Are Foam Fire Extinguishers Also Known As?<\/h2>\n
A foam fire extinguisher can also be known by one of the following names:<\/p>\n
- \n
- AFFF foam fire extinguisher<\/li>\n
- AFFF fire extinguisher<\/li>\n
- Spray foam fire extinguisher<\/li>\n<\/ul>\n
The term \u201cAFFF\u201d refers to Aqueous Film Forming Foam, which describes how the extinguishing agent works.<\/p>\n