The Safe Operation of Gas Tungsten Arc Welding

The TIG harmful factors
Argon arc welding affect the body of harmful factors in three areas:
1, radioactive
Thorium tungsten thorium is a radioactive element, thorium tungsten tungsten arc welding radiation dose is very small, within the allowable range, there is little risk. If the radioactive gases or particles into the body as within the radioactive source, it will seriously affect their health.
2, high-frequency electromagnetic field
Using high-frequency arc, the high-frequency electromagnetic field strength between 60 ~ 110V / m, more than the health standard (20V / m) several times. But since time is very short, has little effect on the human body. Frequent starting arc, or the continued use of the high-frequency oscillator as a stable arc device in the welding process, the high-frequency electromagnetic fields can become one of the harmful factors.
3, the harmful gases - ozone and nitrogen oxides
Argon arc, the arc column temperature. UV radiation is much larger than the general arc welding in the welding process to produce large amounts of ozone and nitrogen oxides; In particular, the ozone concentration is far above the reference health standard. If you do not take effective ventilation, these gases impact on human health, argon arc welding the main harmful factors.
Second, the security measures
1, ventilation measures
Argon arc welding work site should have good ventilation, the discharge of harmful gases and dust. In addition to the plant ventilation, welding capacity, welder concentration install several axial flow fan out the exhaust.
In addition, measures can be applied to local exhaust ventilation will arc around the harmful gases siphoned, such as open arc exhaust hood, exhaust gas torch, light a small fan.
Protective ray measures
Maximize the use of very low radiation dose of cerium tungsten. Thorium-tungsten and cerium tungsten processing, should be sealed or exhaust the grinding wheel, the operator should wear personal protective equipment such as masks, gloves, face and hands should be washed after processing. Thorium tungsten and cerium tungsten pole should be placed on aluminum box within save.
3, high-frequency protection measures
Preparedness and weaken the influence of high frequency electromagnetic fields, the measures taken are:
(1) The workpiece is well grounded, the torch cable and ground use metal braided wire shield;
(2) the appropriate lower frequency;
(3) Try not to use high-frequency oscillator as a stable arc device, reducing the duration of action of high frequency electricity.
(4) other personal protective measures
Argon arc when, due to ozone and ultraviolet rays are strongly advised to wear non-cotton clothes (such as acid, tussah silk, etc.). Welding inside the container can not use local exhaust ventilation, air helmet and air mask or anti-virus masks and other personal protective measures.
 

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