Flammable and Combustible Liquids Flammable liquids v Class

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 1 a

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 1 b

Flammable liquids v Flammable liquids give off ignitable vapors 1 c

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

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 F • Class IIIB liquids have flashpoints at or above 200 degrees F 1 e

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

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

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

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

Handling and storage procedures v Flammable liquids used at workstations must not exceed the sum of: • 25 gallons of Class IA liquids in containers • 120 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 tank 2 e

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 2 f

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

Flood emergencies and storage tanks v Categories of storage tanks • Above ground • Underground • Tanks inside of buildings 3 b

Flood emergencies and storage tanks v Types of storage tanks • Atmospheric • Low-pressure • Pressure vessels 3 c

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