Laboratory SafetyFlammable Liquids and Fire Codes for Laboratories

Laboratory Safety-Flammable Liquids and Fire Codes for Laboratories

Laboratory Safety-Flammable Liquids Properties of Flammable Liquids Invisible Vapor is the Main Concern!

Laboratory Safety-Flammable Liquids Properties of Flammable Liquids Definitions: FLASH POINT The temperature at which a liquid gives off sufficient vapors to form an ignitable mixture with air…near the surface of the liquid.

Laboratory Safety-Flammable Liquids Properties of Flammable Liquids Definitions: Ignition Temperature The minimum temperature required to initiate or cause self-sustained combustion without ignition from an external source. Also called autoignition temp.

Laboratory Safety-Flammable Liquids Properties of Flammable Liquids Definitions: Upper and Lower Explosive Limits The range of concentration of a flammable gas or vapor (% volume in air) in which a explosion can occur upon ignition in a confined area.

Laboratory Safety-Flammable Liquids Compound FP (°F) LEL(%) UEL Acetone 0 2. 6 13 Benzene 12 1. 5 8 CS 2 -22 1 50 Ethanol 55 3 19 Et. Oxide 0 3. 6 100 Ether -49 2 36 Octane 60 0. 5 3 4 75 Hydrogen

Laboratory Safety-Flammable Liquids Ignition Temp Vapor Density Vapor Pressure Acetone 1000°F 2 240 mm Benzene 1044 2. 77 100 CS 2 212 2. 64 400 Ethanol 793 1. 59 40 Ether 356 2. 56 442 Octane 428 3. 86 10 Hydrogen 1075 0. 0069 Compound

Laboratory Safety-Flammable Liquids The Phenomenon of Fire Energy Source Chain Reaction Oxygen or Oxidizer Fuel

Laboratory Safety-Flammable Liquids Fire Codes Who Regulates Flammables? • State Fire Marshal (NFPA, OBBC, and Ohio Fire Code) • OSHA (Occupational Safety) • DOT (Transportation) • EPA (Flammable Waste)

Laboratory Safety-Flammable Liquids Fire Codes-NFPA • Flammable liquids have a flash-point of less than 100°F • Combustible liquids have a flash-point of 100°F or greater

Laboratory Safety-Flammable Liquids Fire Codes-NFPA Flammable Liquid Classification Class IA- FP<73°F, BP<100°F Class IB- FP<73°F, BP>100°F Class IC- 73°F >FP<100°F Class II- 100°F >FP<140°F Class IIIA- 140°F >FP<200°F Class IIIB- FP > 200°F

Laboratory Safety-Flammable Liquids Fire Codes-NFPA Flammable Liquid Classification Common Class IA Solvents • Acetaldehyde • Ethyl Ether • Ethylene Oxide • Pentane

Laboratory Safety-Flammable Liquids Fire Codes-NFPA Flammable Liquid Classification Common Class IB Solvents Acetone Benzen e Ethanol THF Hexane Gasolin e Methanol MEK Acetonitrile Ethyl Acetate Carbon Disulfide Cyclohexane

Laboratory Safety-Flammable Liquids Fire Codes-NFPA Flammable Liquid Storage Hazardous chemicals stored in the open shall be kept to the minimum necessary for the work being done.