This document discusses fire hazards and classifications. It identifies the three elements of the fire triangle as fuel, heat, and oxygen. Fires are classified into different classes including Class A for solid materials like wood, plastic, and paper; Class B for flammable liquids and gases; Class C for electrical fires; and Class D for combustible metals. Special categories include spontaneously combustible materials and hypergolic reactions. To prevent fires, the key steps are to isolate the fire triangle elements, eliminate ignition sources, properly store flammables, restrict smoking, and periodically check electrical circuits.

1. FIRE HAZARDS
Tariq Jamil 17
Shaukat Khan 18
Mohsin Irfan 19
Nauman Khan 20
INDUSTRIAL HEALTH
AND SAFETY

2. • FIRE HAZARDS - Conditions that favor fire development
• Fire – a chain reaction, involving combustion
• FIRE TRIANGLE - starts and sustains fire
• Components:
1. Fuel
2. Heat
3. Oxygen
FUEL: Oil, Gas, Wood
Heat: Spark, Friction
Oxygen: Air

3. FIRE
CLASSIFICATIONS
Class D
Class
B
Special
Cat.
Class CClass A

4. Solid Materials:
 Wood
 Plastic
 Textiles
 Paper etc.
CLASS A

5. Electrical Short circuits
CLASS C

6. Combustible Metals
 Aluminum
 Magnesium
 Titanium
 Zirconium etc.
CLASS D

7. Extremely active oxides
or mixtures
 Nitric acid
 Hydrogen peroxide
 Solid missile propellants
Special
Cat.

8. Flammable Liquids & Gases
CLASS B

9. • Spontaneous Combustions
• Hypergolic reactions
-Pyrophor hypergolic fuels
• Mishandling flammable liquids and gases
• Natural & generated electricity can cause fires.
• Heat from hot surfaces.
• Engines and Compressors.

10. Goals:
1. life protection
2. property protection
3. Protection of operation
STEPS:
 Isolation of Fire Triangle elements
 Ignition sources should be eliminated or isolated
 proper storage of flammable liquids
 Confine smoking to designated areas
 Periodically check electrically ckts