Class IB Liquid

Class IB liquids with flashpoints below 73°F and boiling points at or above 100°F. Examples of Class IB flammable liquids are benzene, gasoline, and acetone (NFPA Diamond 3). 

Class IB liquids have flash points below 296 K (73°F) and boihng points at or above 311 K(100°F). 

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). 

There are several exceptions to Table 3.5 which would permit glass or plastic containers of no more than 1 gallon capacity to be used for class lA and class IB liquids (a) if a metal container would be corroded by the liquid (b) if contact with the metal would render the liquid unfit for the intended purpose (c) if the application required the use of more than one pint of a class lA liquid or more than one quart of a class IB liquid (d) an amount of an analytical standard of a quality not available in standard sizes needed to be maintained for a single control process in excess of 1/16 the capacity of the container sizes allowed by the table and (e) if the containers are intended for export outside the United States. 

Storage tanks should have temperature monitoring with alarms to detect the onset of reactions. The design should comply with all applicable industry, federal, and local codes for a class IB flammable liquid. The storage temperature should be below 37.8 °C. Storage should be under an atmosphere of dry nitrogen and should vent vapors from the tank to a scmbber or flare. 

Class IB flammable liquid...Flash point below 73°F and boiling point at or above 100°F. 

Class lA flammable liquid Flash point below 73°F and boiling point below 100°F Class IB flammable liquid Flash point below 73°F and boiling point at or above 100°F Class IC flammable liquid Flash point at or above 73°F and below 100°F Class 11 combustible liquid Flash point at or above 100°F and below 140°F Class IIIA combustible liquid Flash point at or above 140°F and below 200°F Class IIIB combustible liquid Flash point at or above 200°F... 

Chemical Physical Properties MW 78.1 BP 176°F Sol 0.07% FI.P 12°F IP 9.24 eV Sp.Gr O SS VP 75 mmHg FRZ 42°F UEL 7.S% LEL 1.2% Class IB Flammable Liquid Personal Protection/Sanitation (see Table 2) Skin Prevent skin contact Eyes Prevent eye contact Wash skin When contam Remove When wet (flamm) Change N.R. Provide Eyewash Quick drench Respirator Recommendations (see Tables 3 and 4) NIOSH ScbaF Pd,Pp/SaF Pd,Pp AScba Escape GmFQv/ScbaE See Appendix E (page 351) ... 

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