Combustible liquids, classification

DMF can be purchased ia steel dmms (DOT 17E, UNlAl, 410 lbs net = 186 kg), tank tmcks, and railcars. On Oct. 1, 1993, new regulations in the United States were estabUshed for DMF under HM-181 the official shipping name is /V, /V- dim ethyl form am i de (shipping designation UN 2265, Packing Group III, Flammable Liquid). Formerly, it was classified as a Combustible Liquid in bulk quantities, but as "Not Regulated" in dmms (49 CFR). International overseas shipments have an IMCO classification of 3.3. 

Basic Classification of Flammable and Combustible Liquids Fire Hazard Properties of Flammable Liquids, Gases, and Volatile Solids... 

FPN No. 4) For further information on ventilation, see Plammable and Combustible Liquids Code, NFPA 30-1993 and Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Eacilities, API RP 500-1991, Section 4.6. 

FPN) The area classifications listed in Table 515-2 are based on the premise that the installation meets the applicable requirements of Elammable and Combustible Liquids Code, NFPA 30-1993 (ANSI), Chapter 5, in all respects. Should this not be the case, the authority havingjurisdiction has the authority to classify the extent of the classified space. 

NFPA-325 Guide to Fire Hazard Properties of Flammable Liquids, Gases and Volatile Solids, (1994 ed.), NFPA-321 Basic Classification of Flammable and Combustible Liquids (1991 ed.), NFPA-497A, Classification of Class 1 Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas (1992 ed.), and NFPA-497B, Classification of Class II Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas (1991 ed.), National Fire Protection Association, Quincy, MA. 

In a general sense any material than can bum. This implies a lower degree of flammability, although there is no precise distinction between a material that is flammable and one that is combustible (NFPA 30, Combustible and Flammable Liquids Code, defines differences between the classification of combustible liquids and flammable liquids based on flash point and vapor pressure). 

For flammable and combustible liquids, flash point is the primary basis for classifying the degree of fire hazardousness. NFPA Classifications 1, 2, and 3 designate the most to the least fire hazard liquids, respectively. In essence, low flash point liquids are high fire hazard liquids. 

Some bromine compounds are covered specifically under Hazardous Materials Regulations. Other compounds may usually be shipped under the classification of chemicals, not otherwise indexed by name, without special requirements unless from their nature they would fall under a category such as combustible liquid, compressed gas, corrosive liquid (or solid), disinfectant liquid (or solid), dmg, dye intermediate (liquid), fire extinguisher, flammable gas (liquid or solid), insecticide, medicine, oxidizer or oxidizing material, poisonous liquid (gas or solid), solvent, or tear gas. Specific provisions apply to each of these categories and appropriate packaging and labeling are required. 

Classification of liquid substances that will burn on the basis of flash points. A combustible liquid means any liquid having a flash point at or above 37.8°C (100°F) but below 93.3°C (200°F), except any mixture having components with flash points of 93.3°C (200°F) or higher, the total of which makes up 99 percent or more of the total volume of the mixture. 

DOT CLASSIFICATION 8 Label Corrosive SAFETY PROFILE Moderately toxic by ingestion, skin contact, subcutaneous, intraperitoneal, and intravenous routes. Human mutation data reported. Severe skin and eye irritant. A corrosive material. Combustible liquid. Could react with oxidizing materials. Incandescent reaction with chromium trioxide above 100°. To fight fire, use alcohol foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. 

Three-video set on industrial gases, flammable and combustible liquids, and hazardous chemicals. Identifying hazardous materials, storage and handling, materials classifications, transport, labelling, transferring, fire prevention, and emeigency procedures. 

Flammable and combustible liquids can be designated as Class IA, IB, IC, II, IIIA, or IIIB by the classification system of NFPA 30, Flammable and Combustible Liquids Code. Class IA liquids are considered the most hazardous and Class IIIB the least hazardous. This classification system is based upon the closed-cup flash point temperature and with Class IA and Class IB liquids also the boiling point temperature of the liquid. Liquids are considered flammable if their flash points are below 100°F (37.8°C) and combustible if their flash points are at or above 100°F (37.8°C). 

Further research should be conducted toward establishing a better means to categorize the true fire hazard of all flammable and combustible liquids. The flash point, and in some cases boiling point, are measured values that are used for the current classification system. Additional properties, such as viscosity, dissolved combustible solids, and heat of combustion or heat release rate data should be included in a more comprehensive system. 

For the purposes of the regulation a combustible liquid is defined as any liquid that does not meet the definition of any other classification specified in the regulation and has a flash point at or above 100°F (37.8°C) and below 200°F (93.3°C) except any mixture having one component or more with a flash point at 200°F (93.3°C) or higher, that makes up at least 99 percent of the total volume of the mixture. 

The NFPA uses a classification system for flammable and combustible liquids in fixed storage facilities (see Figure 5.1). This system is part of the consensus standard NFPA 30, the Flammable and Combustible Liquids Code. The NFPA system further divides the flammable and combustible liquid categories into subdivisions based upon the flash points and boiling points of the liquids. NFPA s classification system does not apply to transportation of hazardous materials, since DOT regulations supersede NFPA 30. Examples of liquids in the various classification categories are listed in Figure 5.2. 

NFPA 45,2.2.1.1-4 4.3.2 Fire Hazard Classification - Laboratory units shall be classified Class A (High Fire Hazard), Class B (Moderate fire Hazard), Class C (Low fire Hazard), or Class D (Minimal Fire Hazard), according to the quantities of flammable and combustible liquids present in the lab (outside of the storage area) as specified in Table 2.2.1(a) and Table 2.2.1(b) in NFPA 45. 

Many laboratories have a B (business) classification with sprinkler systems and have a flammable and combustible liquid storage limitation, as shown in Table 4.2. 

TABLE 4.2 Storage Limits for Flammable and Combustible Liquids for Laboratories B Classification with Sprinkler System... 

TABLE 5.1.2.1 Properties of Flammable and Combustible Liquids as Defined by the Globally Harmonized System for Classification and Labelling of Chemicals ... 

NFPA developed a classification system for flammable liquids and combustible liquids (see Table 16-3) that uses flash point, vapor pressure, and expected ambient temperature conditions. A flammable liquid is a liquid with a flash point that does not exceed 100 °F based on testing by closed-cup test methods. A combustible liquid is a liquid with a flash point at 100 °F or higher using the same test methods. The flash point of a liquid is the lowest temperature at which the vapor pressure of the liquid is just sufficient to produce a... 

TABLE 16-3 NFPA Classification for Flammable and Combustible Liquids ... 

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