What do the numbers in the NFPA code mean?

The system uses a color-coded diamond with four quadrants in which numbers are used in the upper three quadrants to signal the degree of health hazard (blue), flammability hazard (red), and reactivity hazard (yellow). The bottom quadrant is used to indicate special hazards.

How do I read my NFPA hazard code?

Codes. The four divisions are typically color-coded with red on top indicating flammability, blue on the left indicating level of health hazard, yellow on the right for chemical reactivity, and white containing codes for special hazards.

What does 4 represent in the NFPA 704 Diamond?

Number System: NFPA Rating and OSHA’s Classification System 0-4 0-least hazardous 4-most hazardous 1-4 1-most severe hazard 4-least severe hazard • The Hazard category numbers are NOT required to be on labels but are required on SDSs in Section 2. … Acute hazards are more typical for emergency response applications.

What do the numbers mean on hazard signs?

The numbers superimposed over the colors rank the severity or danger, ranging from one to four, with four being the highest rating. The blue indicates potential health effects. A four in the blue means severe and immediate health effects, including death, and a one time exposure can cause lasting health problems.

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What do the numbers and colors signify on an NFPA label?

The National Fire Association (NFPA) has developed a color-coded number system called NFPA 704. The system uses a color-coded diamond with four quadrants in which numbers are used in the upper three quadrants to signal the degree of health hazard (blue), flammability hazard (red), and reactivity hazard (yellow).

What is full form of NFPA?

National Fire Protection Association (NFPA) is a United States trade association established in 1896, is to reduce the worldwide burden of fire and other hazards on the quality of life by providing and advocating consensus codes and standards, research, training, and education.

What do the numbers mean on the HMIS and NFPA labels?

Numbers in the three colored sections range from 0 (least severe hazard) to 4 (most severe hazard). The fourth (white) section is left blank and is used only to denote special fire fighting measures/hazards. For additional information on NFPA, see More Resources below.

What does Level 4 flammability hazards indicate?

Risk level 4: Very flammable gases or very volatile flammable liquids. Shut off flow and keep cooling water streams on exposed tanks or containers. Risk level 3: Materials that can be ignited under almost all normal temperature conditions. Water may be ineffective because of the low flash point.

What do NFPA 704 symbols tell you?

The NFPA 704 standard is widely used and recognized by fire and emergency responders and safety personnel for identifying the hazards of short term/acute exposure to materials under conditions of fire, spill, or similar emergencies.

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