093: Fire extinguishing with foam

Foam extinguisher is based on foam and water extinguishing agent and affects two sides of the fire triangle, namely heat and oxygen with cooling and coating the fuel. Foam solution are made of foam concentrate and water when are mixed with air create bubbles. The bubble formed has a low density and is easily placed like a blanket on fires such as oil and gasoline.

Foam types based on fire classes:

1. Class A
2. Class B

Foam types based on foam concentration:

1. Protein
2. Fluoroprotein
3. Film Forming Foam (AFFF, FFFP)
4. Alcohol Resistant
5. Synthetic

Foam types based on expansion:

1. Low expansion: with bubble expansion rate of less than 20
2. Medium expansion: with bubble expansion rate of 20 to 200
3. High expansion: with bubble expansion rate of 200 to 1000

Foam extinguishers types based on application:

1- Portable extinguisher

• Hand held
• Wheeled

2- Fixed extinguisher

• Bladder tank
• Foam dosing
• Foam monitor

Related fire standards:

• NFPA 11
• NFPA 16
• NFPA 1145
• NFPA 1150
• NFPA 412