Characteristics (1) The main research object of welding labor hygiene is fusion welding, and the labor hygiene problem of bright arc welding is the biggest, and the problems of submerged arc welding and electroslag welding are the least. (2) The main harmful factors of manual arc welding, carbon arc gouging and CO2 gas shielded welding are the soot-welding dust generated during the welding process. Especially the electrode arc welding. And carbon arc gouging, if the welding operation is long in the environment with small working space (boiler, cabin, closed container and pipeline, etc.), and if the sanitary protection is not good, it will cause harm to the respiratory system, etc. Suffering from electric welding dust lungs. (3) Toxic gas is a major harmful factor in gas electric welding and plasma arc welding. When the concentration is high, it may cause poisoning symptoms. Among them are ozone and nitrogen oxides, which are produced by the high temperature radiation of the arc and the oxygen and nitrogen in the air. (4) Arc radiation is a common detrimental factor for all arc welding, and the electro-optical eye disease caused by it is a special occupational disease of arc welding. Arc radiation can also damage the skin, causing welders to suffer from skin diseases such as dermatitis, erythema and small blisters. In addition, cotton fibers are damaged. (5) Tungsten argon arc welding and plasma arc welding, because the welding machine is equipped with a high-frequency oscillator to help arc ignition, there are harmful factors - high-frequency electromagnetic fields, especially high-frequency oscillators with long working hours (such as Some factory-made argon arc welding machines). High-frequency electromagnetic fields can cause welders to suffer from diseases of the nervous system and blood system. Due to the use of strontium tungsten rod electrodes, strontium is a radioactive substance, so there are ray harmful factors (α, β and γ ray), which may cause radioactive hazards around the sinter tungsten rod storage and sharpening of the grinder. (6) When plasma arc welding, spraying and cutting, strong noise is generated, and in the case of poor protection, the welder's auditory nerve is damaged. (7) The main harmful factors in the welding of non-ferrous metals are the oxide dust formed by the evaporation of molten metal in the air, and the toxic gas from the flux. Review Various welding methods have little possibility of existence of a single harmful factor in the welding process. In addition to its main harmful factors, several other harmful factors mentioned above may exist at the same time. It must be pointed out that there are several harmful factors at the same time, which are more toxic to the human body than a single harmful factor. Therefore, for some harmful factors that do not appear to exceed the hygiene standards, the necessary health protection measures should also be taken. Car Screws,Anti Theft Nuts For Car,Hex Flange Nut,Four Angle Welding Nut CANGZHOU LINGANG YUANFENG IMPORT & EXPORT TRADING CO.,LTD , https://www.clyfhardware.com