What is the highest warning number on the NFPA diamond?

The number system is based on the NFPA 704 rating: Hazard ratings range from 0 to 4, with 4 being the most hazardous.

What is the highest severity level for the NFPA diamond hazard system?

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.

What does a number 4 in the blue diamond mean?

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. The red indicates explosiveness or readiness to ignite. A four in the red indicates an extremely high ability to ignite and combust.

What do the numbers mean on safety diamond?

A number from 0 to 4 is written in the blue diamond. The higher the number the higher the hazard, as follows: 0-No hazard. 1-Can cause irritation if not treated. 2-Can cause injury.

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What are the range of numbers on a hazards diamond?

The NFPA Fire Diamond symbol is the common identifier along with a rating number (from 0-4) inside of a colored field to indicate a hazard rating. For example: Diesel Fuel has an NFPA hazard rating of 0-2-0. 0 for Health (blue), 2 for Flammability (red), and 0 for Instability/Reactivity (yellow).

What is NFPA hazard rating?


Chemical substances are rated for degree of HEALTH RISK (blue diamond), FLAMMABILITY (red diamond), REACTIVITY (yellow diamond), on a scale of 0 to 4.

What are the 4 categories of identification for NFPA diamonds?

These color codes help emergency responders know about potential health, fire, and chemical instability issues. The NFPA 704 diamond sign used to display this information has four colored sections: blue, red, yellow, and white. Each section is used to identify a different category of potential hazards.

How do you read danger diamonds?

The number corresponds to the level of danger a chemical poses. The lower the number, the lower the hazard. The numbers range from zero to four, with zero representing no hazard at all, and four representing an extreme hazard. Each number also has a specific meaning based on which diamond it is in.

What does red in the risk diamond represent?

The red diamond, appearing at the top of the label, conveys Flammability Hazard information. Again, the numbers 0 to 4 are used to rate the flammability hazard, as follows: 0-No hazard.

Are NFPA diamonds required?

NFPA 704 labels are required when another Federal, state or local regulation or code requires their use. NFPA 704 does not specify when a container, tank or facility must label with the 704 diamond.

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What number represents severe hazard on the National Fire Protection Association label NFPA A and what shape is the label B?

“0” indicates no hazard and “4” indicates the most severe hazard.

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.

Where should NFPA diamonds and labels be?

Positioning NFPA Diamond Labels

In general, it goes on the upper half of the truck so that it is the most visible, but that is not strictly required. When placing labels on containers, it is simply necessary to place them in such a way as to ensure they are easily visible.

What is NFPA diamond code?

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 the NFPA diamond called?

NFPA 704, also known as a fire diamond, is a diamond-shaped sign or picture that tells people about the hazards of a chemical compound. It was designed in 1960 by the National Fire Protection Association, as a way of quickly telling firefighters and other emergency workers what kind of dangers might be nearby.