Tweco K4000 - Manual (Page 12)

2-4
Skin should also be protected from arc rays, heat and molten metal. Always wear
protective gloves and clothing that will not allow skin to become exposed. Close all
pockets and sew shut all cuffs. Wear leather aprons, sleeves, leggings, etc. for out-of-
position gouging/cutting, or for heavy metal-removal operations using large elec-
trodes. High top work shoes provide adequate protection from foot burns. Use leather
spats for added protection. Do not use flammable hair preparations when gouging/
cutting. Wear ear plugs to protect ears from sparks.
2.05 Shielding Booths
Where the work permits, the arc welder should be enclosed in an individual booth
painted with a finish of low reflectivity—an important factor for absorbing ultraviolet
radiations—such as zinc oxide and lamp black. The welder may also be enclosed in
similarly painted noncombustible screens.
2.06 Fire and Burn Hazards
WARNING
WELDING SPARKS CAN CAUSE FIRES AND EXPLOSIONS.
Causes of fire and explosion include combustibles reached by the arc, flame, flying
sparks, hot slag or heated materials. Remove combustibles from the work area and/or
provide a fire watch. Avoid oily or greasy clothing as a spark may ignite them. Keep a
fire extinguisher nearby, and know how to use it.
Be alert to the danger of conduction or radiation. For example, if you will be gouging/
cutting on a metal wall, partition, ceiling or roof, take precautions to prevent com-
bustibles from igniting on the other side. Do not gouge/cut containers that have held
combustibles. Vent all hollow spaces, cavities and containers before gouging/cutting
to permit air or gases to escape. Purging with inert gas is recommended.