Table E-1-Filter Lens Shade Numbers for Protection Against Radiant Energy
Welding operation | Shade number |
Shielded metal-arc welding 1/16-, 3/32-, 1/8-, 5/32-inch diameter electrodes | 10 |
Gas-shielded arc welding (nonferrous) 1/16-, 3/32-, 1/8-, 5/32-inch diameter electrodes | 11 |
Gas-shielded arc welding (ferrous) 1/16-, 3/32-, 1/8-, 5/32-inch diameter electrodes | 12 |
Shielded metal-arc welding 3/16-, 7/32-, 1/4-inch diameter electrodes | 12 |
5/16-, 3/8-inch diameter electrodes | 14 |
Atomic hydrogen welding | 10-14 |
Carbon-arc welding | 14 |
Soldering | 2 |
Torch brazing | 3 or 4 |
Light cutting, up to 1 inch | 3 or 4 |
Medium cutting, 1 inch to 6 inches | 4 or 5 |
Heavy cutting, over 6 inches | 5 or 6 |
Gas welding (light), up to 1/8-inch | 4 or 5 |
Gas welding (medium), 1/8-inch to 1/2-inch | 5 or 6 |
Gas welding (heavy), over 1/2-inch | 6 or 8 |
Table E-2-Selecting Laser Safety Glass
Intensity, CW maximum power density (watts/cm2) | Attenuation | |
Optical density (O.D.) | Attenuation factor | |
10-2 | 5 | 105 |
10-1 | 6 | 106 |
1.0 | 7 | 107 |
10.0 | 8 | 108 |
29 C.F.R. §1926.102