The objects worked on and the environment must have proper controls as well. Quite
often one hears of a person who attempts to repair a container that had a fuel in it.
The vapors ignite and explode, usually resulting in severe injury or death. By filling
such containers with water or sand or by cleaning them and flushing out residual fuel,
welding can be performed safely. The environments for welding and cutting must be free
of flammable gases. In confined spaces, adequate ventilation and breathing air is needed.
Welders should wear proper protective clothing, and welders and others involved in
welding and cutting operations must have training in the operations, their hazards, and
proper controls.