Flammable and Combustible Liquids

Flammable liquids v Class I - liquids have flashpoints below 100 degrees F, with vapor pressures not exceeding 40 psia v Class IA - liquids having flashpoints below 73 degrees F and boiling points below 100 degrees F 1a

Flammable liquids v Class IB - liquids having flashpoints below 73 degrees F and boiling points at or above 100 degrees F v Class IC - liquids having flashpoints at or above 73 degrees F and below 100 degrees F 1b

Flammable liquids v Flammable liquids give off ignitable vapors 1c

Combustible liquids v Class II liquids have flashpoints at or above 100 degrees F and below 140 degrees F 1d

Combustible liquids v Class III liquids have flashpoints at or above 140 degrees F Class IIIA liquids have flashpoints at or above 140 degrees F and below 200 degrees FClass IIIA liquids have flashpoints at or above 140 degrees F and below 200 degrees F Class IIIB liquids have flashpoints at or above 200 degrees FClass IIIB liquids have flashpoints at or above 200 degrees F 1e

Handling and storage procedures v Two forms of storage: Reserve storage in drumsReserve storage in drums Operational storage in small quantities at work stationsOperational storage in small quantities at work stations v Connect drums to a grounding system 2a

Handling and storage procedures v Liquids can be dispensed by two methods: Gravity flowGravity flow Pump methodsPump methods 2b

Handling and storage procedures v Areas where flammable liquids are transferred from one container to another must: be protected from ignition sourcesbe protected from ignition sources have drainage or other methods to control spillshave drainage or other methods to control spills have natural or mechanical ventilationhave natural or mechanical ventilation 2c

Handling and storage procedures v Store flammable liquids in approved safety cans 2d

Handling and storage procedures v Flammable liquids used at workstations must not exceed the sum of: 25 gallons of Class IA liquids in containers25 gallons of Class IA liquids in containers 120 gallons of Classes IB, IC, II, or III liquids in containers120 gallons of Classes IB, IC, II, or III liquids in containers 660 gallons of Class IB, IC, Class II, or Class IIIA liquids in a single portable tank660 gallons of Class IB, IC, Class II, or Class IIIA liquids in a single portable tank 2e

Handling and storage procedures v Use specially designed waste cans for the disposal of waste v Remember that it is the vapors, not the liquid that burns v Use specially developed absorbent materials for spill cleanup 2f

Flood emergencies If flammable liquids are stored in tanks, review and understand the location and contents of flood emergency instructions v Emergency action plans 3a

Flood emergencies and storage tanks v Categories of storage tanks Above groundAbove ground UndergroundUnderground Tanks inside of buildingsTanks inside of buildings 3b

Flood emergencies and storage tanks v Types of storage tanks AtmosphericAtmospheric Low-pressureLow-pressure Pressure vesselsPressure vessels 3c

Flood emergencies and storage tanks v Keep debris and vegetation away from the tank area v Situate tanks in areas where high- level water will not occur v Anchor horizontal tanks if more than 70 percent of the tank’s capacity will be submerged 3d