• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
FLAMMABLE AND COMBUSTIBLE LIQUIDS - h1015v2_124
Figure 4  DOT Flammable Liquid Labels

Chemistry Volume 2 of 2
Page Navigation
  101    102    103    104    105  106  107    108    109    110    111  
DOE-HDBK-1015/2-93 Hazards of Chemicals and Gases FLAMMABLE AND COMBUSTIBLE LIQUIDS Rev. 0 CH-05 Page 31 IC - Those liquids having flash points at or above 73   F and below 100   F. Class II - Those liquids having flash points at or above 100   F and below 140   F. Class III   - Those liquids having flash points above 140   F. IIIA - Those liquids having flash points at or above 140   F and below 200   F. IIIB  - Those liquids having flash points above 200   F. Flammable and combustible liquids vaporize to form flammable mixtures when they are stored in open containers, when they leak or are spilled, or when heated.  The hazard that exists from these mixtures is largely dependent upon the flash point of the liquid, the concentration of the mixture, and the potential of a source of ignition at a temperature sufficient to cause the mixture to burst into flame. Since it is the vapor-air mixture formed from the evaporation of the liquid that poses the hazard, exposures of large liquid surface areas and sources of heat should be avoided or prevented during handling or storage of these liquids. Some  of  the  commonly  used  terms  associated  with  flammable  and  combustible  liquids  are provided below. Auto-Ignition Temperature - The minimum temperature at which a flammable mixture will ignite from its own heat source or contact with a heated surface without necessity of a spark or flame. Flash Point - The   minimum   temperature   at   which   a   liquid   gives   off   vapor   in   sufficient concentration to form an ignitible mixture with air near the surface of the liquid (under controlled test conditions). Flammable Limits - The minimum concentration of vapor in air below which propagation of flame does not  occur  on  contact  with  a  source  of  ignition.    This  is  known  as  the  lower flammable limit (LFL).  There is also a maximum concentration of vapor or gas in air  above  which  propagation  of  flame  will  not  occur.    This  is  called  the  upper flammable limit (UFL). Flammable Range - The  difference  between  the  lower  and  upper  flammable  limits,  expressed  in percentage of vapor or gas in air by volume.  Also known as the explosive range. Propagation of Flame - The spread of flame through the entire volume of the flammable mixture from a single source of ignition.







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.