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Earthing of the work piece
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Selective screening of other cables and installations
Endangerment through heat and light radiations
The plasma arc produces intense ultraviolet and infrared radiation that can hurt the eyes and
skin. Therefore the following precautions have to be arranged:
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Wearing of flame-retardant welding clothes (helmet, apron, gloves, safety shoes)
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Hand or head shield with protective glasses of medium shade for watching the cutting
process
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Preparing the cutting area so that reflection and transmission of ultraviolet light is
reduced:
-painting of walls in dark colour
-use of protective walls and screens
Endangerment through fumes and smoke
Due to the plasma process itself hazardous substances may be produced. To avoid risks on
health the following has to be done:
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Keep cutting place well ventilated
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Remove fumes and smoke by exhaustion devices
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Remove all chlorinated and other solvents from the cutting area. They could form
phosgene gas when exposed to ultraviolet radiation
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Wear a breathing mask when cutting galvanised materials
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Ensure that toxic limits are not exceeded
Endangerment through noise
Be aware that during plasma cutting a high noise level arises.
Cutting current
Thickness
Noise level in distance of
0,5 m
1,0 m
No load
56dB(A)
80A
4mm
82 dB(A)
79 dB(A)
160A
l6mm
86 dB(A)
83 dB(A)
240A
l6mm
96 dB(A)
92 dB(A)
Above levels are general. Variations may occur.
Therefore wear proper ear protection.
Endangerment through spatter
During plasma cutting sparks, slag and hot metal are produced. The risk of burns and fire
exists! To avoid these endangerments the following has to be advised:
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remove all potential flammable materials from cutting area, at least in a 10 m distance
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cool down freshly cut material before handling
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make fire extinguisher available in the cutting area
Handling of pressure cylinders
In some cases compressed gases are required for the plasma cutting process. To avoid
endangerments the following has to advised:
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Place cylinders upright in secured position
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Never use damaged cylinders, pressure reducers and armatures
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Use pressure reducers only for the gas it is determined
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