welding helmet

 

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Welding helmet

A welding helmet is typically worn when arc welding.

Welding helmets are headgear used when performing certain types of welding to protect the eyes, face and neck from flash burn, ultraviolet light, sparks and heat. Most commonly used with arc welding processes such as shielded metal arc welding and gas metal arc welding, welding helmets are necessary to prevent arc eye, a painful condition where the cornea is inflamed. Welding helmets can also prevent retina burns, which can lead to a loss of vision. Both conditions are caused by unprotected exposure to the highly-concentrated UV rays emitted by the welding arc (which can also damage uncovered skin, similar to a sunburn).

All welding helmets include a small window, called a lens shade, through which the welder looks at the weld. In older helmets, the window can be made of darkly tinted glass, or perhaps a pair of polarized lenses. In more modern helmet designs, transparent material that darkens automatically when exposed to the flare of a welding arc are more common. Either type, however, is susceptible to damages such as cracks that can compromise the protection from ultraviolet rays. In addition to the lens shade, the helmet has a shroud around the face to protect it from hot metal sparks generated by the arc. Some older models have a leather covering protecting the neck and shoulders as well.[citation needed]

 

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