![]() ![]() Liquids having a flash point below 22.8 ☌ (73 ☏) and having a boiling point at or above 37.8 ☌ (100 ☏) or having a flash point between 22.8 and 37.8 ☌ (73 and 100 ☏). Liquids and solids (including finely divided suspended solids) that can be ignited under almost all ambient temperature conditions (e.g. diesel fuel, paper, sulfur and multiple finely divided suspended solids that do not require heating before ignition can occur). Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur (e.g. Includes some finely divided suspended solids that do not require heating before ignition can occur. Materials that require considerable preheating, under all ambient temperature conditions, before ignition and combustion can occur (e.g. Materials that will not burn in air unless exposed to a temperature of 820 ☌ (1,500 ☏) for more than 5 minutes. carbon tetrachloride, silicon dioxide, perfluorohexane), including intrinsically noncombustible materials such as concrete, stone, and sand. Materials that will not burn under typical fire conditions (e.g. The numeric values in the first column are designated in the standard by "Degree of Hazard" using Arabic numerals (0, 1, 2, 3, 4), not to be confused with other classification systems, such as that in the NFPA 30 Flammable and Combustible Liquids Code, where flammable and combustible liquid categories are designated by "Class", using Roman numerals (I, II, III). The latest version of NFPA 704 sections 5, 6, 7 and 8 for the specifications of each classification are listed below. ![]() Each of health, flammability and reactivity is rated on a scale from 0 (no hazard) to 4 (severe hazard). ![]() 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. Standard System for the Identification of the Hazards of Materials for Emergency Response ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |