Torches used in enclosed spaces must be shut off when left unattended during lunch or short periods.
Torches must be removed at night.
Never perform welding/cutting in an area containing combustible vapors, flammable liquids or explosive dust. Tanks and other closed containers which have held such materials should not be cut or welded.
Proper ventilation must be always maintained. Where not adequate, mechanical or local exhaust systems should be used.
When welding or cutting operations must be done in confined spaces, proper ventilation must be maintained, and rescue procedures established.
Oxygen must not be used to ventilate, cool, blow away dust or clean clothing, or to clean the work area.
Use of oxygen could increase the hazard of a fire-starting during welding operations.