Hypertherm HT4100 Plasma Arc Cutting System Operating - Manual (Page 13)

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SAFETY
HT4100 Instruction Manual: Operation
WARNING
• Do not touch the front of the torch when starting it. After cutting, allow time for the
front of the torch to cool.
Toxic Fume Prevention
To protect against the danger of toxic fumes which may be produced during cutting:
• Keep the cutting area well-ventilated.
• Remove all chlorinated solvents from the cutting area before cutting. Certain
chlorinated solvents decompose when exposed to ultraviolet radiation to form
phosgene gas.
• Wear proper breathing mask when cutting galvanized metal and use proper
ventilation.
• Do not cut containers with toxic materials inside or containers that have held toxic
materials. Clean such containers thoroughly before cutting.
Do not cut metal or painted metals containing zinc, lead, cadmium or beryl-
lium unless the operator, or anyone else subjected to the fumes, is wearing
respiratory equipment or an air-supplied helmet.
Fire Prevention
Cutting with a plasma system produces hot metal, sparks and slag. Take the follow-
ing precautions against fire:
• Make fire extinguishers available in the cutting area.
• Remove combustible material from the immediate cutting area to a distance of at
least 35 feet (10 meters).
• Quench freshly cut metal or allow metal to cool before handling it or bringing it into
contact with combustible materials.
• Never use a plasma system to cut containers with potentially flammable materials
inside. Such containers must be thoroughly cleaned prior to cutting.