FLAMMABLE AND COMBUSTIBLE LIQUIDS

• LEL AND UEL (Same as LFL and UFL)• FLASH POINT• VAPOR PRESSURE• SPECIFIC GRAVITY• VAPOR DENSITY

CLASSES OF LIQUIDS

• FLAMMABLE• COMBUSTIBLE

FLAMMABLE LIQUIDS

• Definitions under OSHA 1910 Standards– What about 1926 standards??

• FLASH POINT BELOW 100 DEGREES F– CLASSES– IA - FP BELOW 73 DEGREES BOILING POINT BELOW

100 DEGREES– IB - FP BELOW 73 DEGREES BOILING POINT AT OR

ABOVE 100 DEGREES– IC - FP AT OR ABOVE 73 DEGREES AND BELOW 100

DEGREES

COMBUSTIBLE LIQUIDS

• FLASH POINT AT OR ABOVE 100 DEGREES F• CLASSES– II - FP AT OR ABOVE 100 DEGREES AND BELOW

140 DEGREES– IIIA - FP AT OR ABOVE 140 DEGREES AND BELOW

200 DEGREES– IIIB - FP AT OR ABOVE 200 DEGREES

Applying the OSHA Standards

• What type of facility is it?• What types of liquids fall under 1910.106?• If it is an industrial facility, is the handling of

flammable and combustible liquids a major requirement of the business process or is it incidental use?

• If incidental use, then follow 1910.106(e) Industrial Facilities

Storage cabinets

• 1910.106 (d)(3)• Design, construction, and capacity of storage

cabinets– Specific requirements on design and construction. • Must withstand a 10 minute fire test.

– No more than 60 gallons of Class I & II liquids should be stored in a cabinet and a maximum of 120 Gallons of Class III.

Inside Storage Rooms

• Design requirements for inside storage rooms:• OSHA Standards– 1910.106(d)(4)– "Design and construction of inside storage rooms"

Inside Storage Rooms

• Be sure to address in your case study: – Room construction (ratings, doors, etc)– Electrical Wiring– Ventilation– Clear aisles– This list may not be all inclusive (read the

standards)

Point of Use Procedures

• If handling occurs in an industrial facility, follow requirements under 1910.106(e)(6)

• Why is grounding and bonding required?– For example, what classes of liquids?

• What impact does using a plastic safety can have on this?

• Are plastic safety cans acceptable for use in the workplace by OSHA?

Aboveground Storage Tanks

• 1910.106(b)(2) addresses aboveground tanks• Topics include tank design and construction,

spill containment, dikes, venting, etc.