What is a NFPA 704 symbol?
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 does the letter W with a line through it represent on a NFPA 704 label?
Hazard Category: SPECIAL HAZARDS (White) Only W with a line thru (water reactivity), OX (oxidizers) and SA (simple asphyxiant gases) are officially part of the NFPA 704 2012 standard.
What 4 hazards are classified on the NFPA 704 diamond?
The system addresses the health, flammability, instability, and special hazards presented from short-term, acute exposures that could occur as a result of a fire, spill, or similar emergency.
What do the letters in NFPA stand for?
NFPA – National Fire Protection Association.
What is the highest rating for toxic chemicals on an NFPA diamond?
NFPA Rating Criteria and NFPA Labels A number rating system of 0-4 is provided to rate each of the four hazards and is placed on a placard. 0 represents the least hazardous while 4 represent the most hazardous.
What do the colors red blue yellow and white represent on the NFPA 704 diamond?
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 do each of the NFPA 704 Fire diamond’s flammability ratings 0-4 mean?
1-Ignites after considerable preheating. 2-Ignites if moderately heated. 3-Can be ignited at all normal temperatures. 4-Very flammable gases or very volatile flammable liquids.
How many types of fire are there in NFPA?
According to NFPA 10-2018, there are five primary classes of fire: Class A: result from ordinary combustible materials, including wood, cloth, paper, and many plastics. Class B: burn in flammable liquids, combustible liquids, petroleum greases, oils, alcohols, and flammable gases.
What do the colors red blue yellow and white represent on the NFPA 704 Diamond?
Which NFPA symbol indicates the greatest risk?
The red, blue, and yellow diamonds use a numbering system from 0 – 4 to indicate the severity of each fire, health, and reactivity hazard, respectively. “0” indicates no hazard and “4” indicates the most severe hazard.
Are NFPA 704 placards required?
NFPA 704 Placards are required for any business or commercial building that has a quantity of hazardous materials equal to or greater than a total weight of 500 pounds solid, 55 gallons liquid, 200 cubic feet of gas or where a radioactive product is used, stored or handled.
What is the NFPA hazard rating system?
The hazard rating system they designed is called the NFPA 704 Diamond , and it classifies chemicals numerically from 0 to 4 based off of four attributes. The higher the number, the more dangerous the chemical in that category. The four categories that are used for analyzation are health, reactivity, flammability, and special hazards.
When are NFPA labels 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.
What is the NFPA 704 fire diamond?
The “Fire Diamond” or “NFPA 704” refers to signs posted at locations that contain hazardous materials . The purpose of the signs are to alert emergency personnel to the risks posed by the materials.