There are different charts for different kind of welding jobs, hereby we are mentioning the same: Filter lenses for protection during shielded Metal Arc welding Operationįilter lenses for gas welding and oxygen cutting operations Operation But the combined value of the lens shade number and helmet should be equal to the value shown in the tables below. The filter lens which comes along with the welding helmet can be reduced. The shade that is perfect for a fire watch will not be suitable for a professional in automobile industry. The shade number of lens differs in case of different professionals. Requirement of lens protection for different profession: So the guide may help you to decide which lens number is best suited for your job. But you must choose a shade that allows you to see the puddle clearly and without any difficulty you can weld.Īlso the lens should provide ample visibility in time of welding. These numbers correspond with the welding amperage. There are some suggested lens numbers that you can use as a guide when you are unsure of the application.This darkness basically differs in requirement for various professions. The shade number means the amount of darkness the lens will provide.
Any well constructed lens has a screen which filters out 100% UV and IR rays or wavelengths, so you get full protection. This is a myth that the lens shade is corresponded to the amount of protection for the eyes of the wearer. So the higher the shade number is the better protection you will avail from it. The shade number provides information about the intensity of the light radiation that it will protect you from. The eyewear engineered to give your eyes some protection comes with a particular shade number and that is the general process of understanding how good or useful the eyewear is for your purpose. The eyewear should have proper protection on the filter lens, which is indicated by the shade number. So to stay protected while welding, it is your responsibility to arrange for safety glasses, goggles, a good auto-darkening welding helmet or welding face shields.
But the radiant energy or light radiation happens to affect your eyesight and it cannot be reduced by any method.
The burnt skin can get cured and the poisonous gas you inhale by accident may be sorted by taking some medicine. This is most dangerous for the eyes because the damage done cannot be undone. But most dangerous is probably the damage of eye that takes place when the arc is created and the harmful electromagnetic energy given off by the arc. There are risks of getting burnt and nauseating due to the smoke that emits during welding. Welding as a profession has its own share of hazards.