Flammable liquids, classification

Acrolein is a DOT Flammable Liquid having subsidiary DOT hazard classifications of Poison B and Corrosive Material. It is also an inhalation hazard that falls under the special packaging requirements of 49 CER 173.3a. 

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. 

NFPA 497 Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, 1997 edition. National Fire Protection Association, Quincy, MA. 

An aerosol which is flammable in accordance with paragraph 2 or Part III of Schedule 1 shall have the classification of a flammable gas. Other aerosols need not be classified as flammable gas or flammable liquid. 

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

FPN) The Zone 2 classification usually includes locations where volatile flammable liquids or flammable gases or vapors are used, but which would become hazardous only in case of an accident or of some unusual operating condition. 

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 the purposes of determining laboratory fire hazard classification, liquefied flammable gases should be treated as Class I flammable liquids. 

Fires are classified based on the type of fuel involved. Fuels are typically placed into three classes ordinary combustibles (like wood and paper), flammable liquids, and combustible metals. For firefighting, a fourth fire class, electrical fires, is also considered. The four main classifications of fire are shown in Table B-1. 

Light Vacuum Gas Oil CAS number Classification Hazard class TSCA Safety profile 64741-58-8 Flammable Liquid 3 Reported in inventory Possible carcinogen pulmonary aspiration can cause severe pneumonitis. 

Xylene CAS number UN number Classification Hazard class TSCA Flash point, PMCC OSHA PEL Vapor pressure 1330-20-7 UN 1307 Flammable liquid 3 Reported in TSCA inventory 83°F (28°C) TWA 100 ppm STEL 150 ppm 6.72 mmHg 70°F (21°C)... 

Underwriter s Laboratories Classification (uic). This is a standard classification for grading the relative fire hazard of flammable liquids against the following standards ... 

The flash point is a measured temperature at which vapors above the surface of a liquid are just sufficiendy concentrated to propagate a flame (10). In practice, materials of concern may be in closed or open containers or may have spilled. Generally, the chosen flash point method should be related to the problem as well as to the type of material ie, open-cup methods are more significant for open containers or spills, whereas closed-cup methods give more significant information for closed containers, eg, process vessels. A number of commercial flammable liquids contain a moderate amount of noncombustible components, eg, chlorinated hydrocarbons, in order to elevate the closed-cup flash point and thus gain a more favorable classification. When the same material is analyzed by an open-cup method, the flash point is not elevated, ie, after a spill, the noncombustible material would soon be lost and the residue may be highly flammable. 

Flammability of Liquids, No. 340, Underwriters Laboratories Northbrook, 111., 1972 Flame Arresters, No. 525, 1973 Flammable Liquid Dispensing, No. 1238,1975 Group Classification of Flammable Liquids and Gases, Test Report MH8593, 67C2889,1967. 

U.S. Department of Transportation classification flammable liquid, hazard label 3.3 DOT/UN/Na shipping number 2521, flammable liquid. Transport by sea IMDG-code class 3.3, p. 3333, emeigency sheet 3—06. Transport by rail and road RID/ADR class 3 Rn 301-31c. 

Ethyl alcohol is a flammable liquid requiring a red label by the DOT and Coast Guard shipping classifications its flash point is 14°C (Tag, closed cup). Vapor concentrations between 3.3 and 19.0% by volume in air are explosive. Liquid ethyl alcohol can react vigorously with oxidizing materials. Ethyl alcohol has found wide application in industry, and experience shows that it is not a serious industrial poison (273—275). If proper ventilation of the work environment is maintained, there is litde likelihood that inhalation of the vapor will be hazardous. 

Does the proposal introduce flammable liquids or gases or combustible dusts into areas that do not have the proper electrical area classifications ... 

Predictive hazard evaluation procedures may be required when new and different processes, designs, equipment, or procedures are being contemplated. The Dow Fire and Explosion Index provides a direct method to estimate the risks in a chemical process based upon flammability and reactivity characteristics of the chemicals, general process hazards (as exothermic reactions, indoor storage of flammable liquids, etc.) and special hazards (as operation above the flash point, operation above the auto-ignition point, quantity of flammable liquid, etc.). Proper description of this index is best found in the 57-page Dows Fire and Explosion Index, Hazard Classification Guide, 5 th ed., AIChE, New York, 1981. 

A flammable chemical substance is a solid, liquid, vapor, or gas that ignites easily and burns rapidly in air. Many of the flammable chemicals used in laboratories are flammable liquids and organic solvents. The vapors of these chemical substances form ignitable mixtures with air. Based on the flash points of these chemicals, classifications are made. The flash point of a chemical substance is defined as the lowest temperature at which a fuel-air mixture present above the surface of a liquid will ignite, if an ignition source is present. The common flammable chemical substances include, but are not restricted to, acetone, benzene, cyclohexane, ethanol, ethyl acetate, ethyl ether, gasoline, hexane, isopropyl alcohol, methanol, propanol, tetrahydro-furan and toluene, and xylene. 

CLASSIFICATION OF FLAMMABLE LIQUIDS FLASH POINT AND BOILING POINT... 

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