voestalpine Bohler Welding URANOS NX 2700 TLH Mode D'emploi page 10

• Sparks and incandescent particles might easily be sprayed quite far and reach the surrounding areas even through minute
EN • Do not perform welding operations on or near containers under pressure.
•
operations on pipes or containers even if these are open, empty and have been cleaned thoroughly. Any residue of gas, fuel,
oil or similar materials might cause an explosion.
• Do not weld in places where explosive powders, gases or vapours are present.
• When you finish welding, check that the live circuit cannot accidentally come in contact with any parts connected to the earth
circuit.
• Position a fire-fighting device or material near the work area.
1.5 Prevention when using gas cylinders
Inert gas cylinders contain pressurized gas and can explode if the minimum safe conditions for transport, storage
and use are not ensured.
• Cylinders must be secured in a vertical position to a wall or other supporting structure, with suitable means so that they cannot
fall or accidentally hit anything else.
• Screw the cap on to protect the valve during transport, commissioning and at the end of any welding operation.
• Do not expose cylinders to direct sunlight, sudden changes of temperature, too high or extreme temperatures. Do not expose
cylinders to temperatures too low or too high.
• Keep cylinders away from naked flames, electric arcs, torches or electrode guns and incandescent material sprayed by
welding.
• Keep cylinders away from welding circuits and electrical circuits in general.
• Keep your head away from the gas outlet when opening the cylinder valve.
• Always close the cylinder valve at the end of the welding operations.
• Never perform welding operations on a pressurized gas cylinder.
• A compressed air cylinder must never be directly coupled to the machine pressure reducer! Pressure might exceed the
capacity of the reducer which could consequently explode!
1.6 Protection from electrical shock
Electric shocks can kill you.
• Avoid touching live parts both inside and outside the welding system while this is active (torches, guns, earth cables,
electrodes, wires, rollers and spools are electrically connected to the welding circuit).
• Make sure that the welding system and the welder are electrically isolated by using dry bases and floors that are adequately
isolated from earth.
• Ensure the system is connected correctly to a socket and a power source equipped with an earth conductor.
• Do not touch two torches or two electrode holders at the same time.
• lf you feel an electric shock, interrupt the welding operations immediately.
The arc striking and stabilizing device is designed for manual or mechanically guided operation.
Increasing the length of torch or welding cables more than 8 m will increase the risk of electric shock.
1.7 Electromagnetic fields and interferences
The current passing through the internal and external system cables creates an electromagnetic field in the
proximity of the welding cables and the equipment itself.
• Electromagnetic fields can affect the health of people who are exposed to them for a long time (the exact effects are still
unknown).
• Electromagnetic fields can interfere with some equipment like pacemakers or hearing aids.
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