In oxyfuel gas welding or cutting where the torch produces a high yellow light, it is desirable to use a filter lens that absorbs the yellow or sodium line the visible light of the (spectrum) operation. 1 the shade lens number required for arc welding exceeding 400 amperes can be determined using the formula: Arc welding exceeding 400 amperes requires a shade lens number.
Lens Shade for Welding Helmets Chart With Calculator
Shade #10 and 11 are generally used for tig welding.
Shade number = 1.5 + log(i/5), where i is the welding current in amperes 2.
Then go to a lighter shade which gives sufficient view of the weld zone without going below the minimum. Welding safety & health head & face aws shade selector filter lenses for protection during shielded metal arc welding1 operation electrode size arc current (amperes) osha. Browse our full line of welders,. Welding helmets with filter lenses are intended to protect users from arc rays, weld sparks and spatter, which impinge directly against the helmet.
If you can get the gold plated shade it helps to. According to standard safety recommendations, the appropriate shade lens number for arc welding at this level should be high enough to provide adequate protection. Stick welding and mig welding generally require #12 or 14 shades. Many experts or professionals recommend a shade number between 9 to 13 as a good and safe number.
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Arc welding exceeding 400 amperes requires a shade lens number: Used for low to moderate current plasma arc cutting.
