Hypertherm V9 Series Phoenix Rev.11 - Manual (Page 17)

Safety and Compliance SC-17
Safety
CUTTING CAN CAUSE FIRE OR EXPLOSION
Fire prevention
• Be sure the area is safe before doing any cutting.
Keep a fire extinguisher nearby.
• Remove all flammables within 35 feet (10 m) of the
cutting area.
• Quench hot metal or allow it to cool before handling
or before letting it touch combustible materials.
• Never cut containers with potentially flammable
materials inside – they must be emptied and properly
cleaned first.
• Ventilate potentially flammable atmospheres before
cutting.
• When cutting with oxygen as the plasma gas, an
exhaust ventilation system is required.
Explosion prevention
• Do not use the plasma system if explosive dust or
vapors may be present.
• Do not cut pressurized cylinders, pipes, or any
closed container.
• Do not cut containers that have held combustible
materials.
WARNING
Explosion Hazard
Argon-Hydrogen and Methane
Hydrogen and methane are flammable gases that
present an explosion hazard. Keep flames away from
cylinders and hoses that contain methane or hydrogen
mixtures. Keep flames and sparks away from the torch
when using methane or argon-hydrogen plasma.
WARNING
Hydrogen Detonation with
Aluminum Cutting
• Do not cut aluminum underwater or with water
touching the underside of the aluminum.
• Cutting aluminum underwater or with the water
touching the underside of the aluminum can result in
an explosive condition that can detonate during
plasma cutting operations.
WARNING
Explosion Hazard
Underwater Cutting with Fuel Gases
• Do not cut under water with fuel gases containing
hydrogen.
• Cutting under water with fuel gases containing
hydrogen can result in an explosive condition that
can detonate during plasma cutting operations.