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Extraction and filtering welding fume.
The welding combines intense heat and metal parts to improve the assembly of larger parts. Smoke emerges from base metal and especially electrodes. Welding smoke is a complex mixture of metals, gases and other compounds. It also contains very small particles, including ultra thin substance. The exposure of welders depends on various factors, including workplace characteristics and protective measures.
Protect yourself from welding fumes:
Various dangers have been associated with exposure to welding smoke particles.
These dangers are related to the high concentrations of thin and ultra -thin metal and metal oxide particles made by the welding arc. The heat produced by the ARK melts the electrode which is transferred to the welding pool in the form of excessive heated metal droplets. Spring particles are also formed. Summing particles and heated metal droplets produce excessively saturated metal vapors at high concentrations nucleated to form solid particles. These particles are concentrated and clotting as they cool to the ambient temperatures, which leads to the formation of chain aggregates and aglomere.
Welders operate in a large number of environments, exterior, outdoor, open, well -ventilated areas (eg construction sites) closed, insufficient ventilated areas (eg crawling areas, ship bodies and pipelines). The proximity of the welder to the arc exposes the operator to metal smoke at high concentrations); Therefore, exposure studies often measure the smoke concentrations of the welder's breathing zone. In recent years, researchers have granted an increasing importance to examine the effects of exposure to certain smoke components such as manganese, chromium, nickel and other volatile chemical species and to look for ways to minimize exposure.
A large amount of effort has been made to the development of exhaust ventilation systems to remove welding fumes. Some of these ventilation systems include extraction torch, local exhaust ventilation and welding cabins with built -in exhaust walls. In spite of these options, for practical or economic reasons, welding operations often occur in open areas where there are no engineering controls, where nearby workers who deal with other jobs may be exposed to smoke. This may be particularly widespread in construction or production facilities where workers in multiple stations share the same wide, open work area. In general, although the effort is made to protect the arc and protect nearby employees from exposure to ultraviolet light, very little is done to control and prevent exposure caused by smoke. This not only causes the welder to be exposed to welding smoke, but also to be exposed to second -hand employees.
HiVent Technology, 01/02/2024, Ankara
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