(Source: Table 7, CSA W117.2:19, Safety in welding, cutting, and allied processes. © 2019 Canadian Standards Association. Figure 2 below is extracted from Table 7 of CSA W 117.2 and illustrates a shade selection chart for different processes and current levels for arc welding and thicknesses for Oxy-Acetylene welding and cutting.įigure 2.
#Shade control for welding helmet series#
The desired shade requirement can be found in safety literature from the helmet manufacturer or in welding safety standards such as CSA W117.2 Standard for Safety in Welding, Cutting and Allied Processes. Lincoln Electric Replacement Viking 2450 & 3350 Series Graphic Helmet Shells Top Features Compatible with 4th Gen 3350 & 2450 Series Lenses Gloss protective finish increases durability Constructed of proprietary nylon material which was designed to provide both durability and flexiblity Includes low profile external grind button. The shade selection is normally 9 to 13, but some models offer shade selection from 5 to 9 for grinding and cutting materials using Oxy-Fuel or Plasma and then 9 to 13 for arc welding.
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Low amperage MIG or TIG welding is best performed with low shade levels to assure adequate visibility of the welding arc puddle. The shade adjustment control allows the welder to choose whatever shade required for the welding process used and the intensity of the amperage. Wear a welding helmet fitted with a proper shade of filter to protect your face and eyes when welding or watching. For example, welding on thick materials at high amperages generally requires higher shade levels. Most auto-darkening helmets use a solar cell array which captures the light from the welding arc and signals the Electro-optic welding lens to darken within 1/25,000 of a second. Lincoln Electric K3034-4 Auto-Darkening Helmet 5. This ensures that that helmet and lenses have been passed through independent testing showing that they can protect from UV and infrared radiation.
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It has solar backup to save energy during any use. When choosing a welding helmet, you should first consider that the helmet is meeting the ANSI Z87.1 2003 standards. Comes with Variable Shade / Control: 9-13 External. Tekware True Color Auto Darkening Welding Helmet 4. For cost-conscious welders ready for a considerable starter helmet, this Jackson Safety Fixed Shade 10 welding helmet is a smart choice. Antra Wide Shade Auto-Darkening Helmet 3. Auto-darkening helmets, Figure 1, work basically by sensing the light from the arc and electronically activating a liquid crystal filter within the lens to darken to a preselected shade and protect the welders face and eyes from ultraviolet and infrared radiation (UV/IR). Best Auto-darkening Welding Helmet Here’s an informative comparison guide on the key features of all 8 products: Contents 1.