Department of Public Safety
National Fire Protection Agency (NFPA) Marking System
FIXED SITE LABELING OF TANKS AND STORAGE CONTAINERS
N.F.P.A 704 SYSTEM
This National Fire Protection Association (N.F.P.A) diamond is the standard label that is displayed on large capacity storage tanks at fixed site chemical manufacturing and Oil refineries and other storage facilities. The significance of this label is its ability to give a "Quick Look" at the potential hazards that exist if the stored substance is released to the environment.
The Blue, Red and Yellow inter-diamonds specify what KIND of hazards are present and how GREAT those hazards can be. Each colored area will display a NUMBER ranging from 0 to 4. 0 represents MINIMAL hazard, while 4 signifies MAXIMUM hazard. The White area denotes special information that is usually written in words or special symbols, such as:
OX = Oxidizer ; ACID = Acid ; ALK = Alkali ; COR = Corrosive
HAZARD |
HEALTH |
FLAMMABILITY Flash Point |
REACTIVITY |
4 |
Deadly |
Below 73 F |
May Detonate |
3 |
Extreme Danger |
Below 100 F |
Explosive |
2 |
Dangerous |
Below 200 F |
Unstable |
1 |
Slight Hazard |
Above 200 F |
Normally Stable |
0 |
No Hazard |
Will Not Burn |
Stable |
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