Welding Lens Recommendations

Welding Lens Recommendations
Chart for Lens Tint for Protection against
Radiant Energy
General operations
Operation
Shielded metal
arc welding
Electrode Size
in Arc Current
1/32″ (0.8mm)
<3
3-5
5-8
>8
Gas Metal arc Welding
and Flux cored arc
welding
Gas Tungsten arc welding
Air Carbon
Arc Cutting
Light
Heavy
Plasma Arc Welding
Plasma Arc Cutting
Torch Brazing
Torch Soldering
Carbon Arc Welding
1
Light 2
Medium 2
Heavy 2
Arc Current
< 60
60-160
160-250
250-550
< 60
60-160
160-250
250-500
< 50
50-150
150-500
< 500
500 – 1,000
< 20
20-100
100-400
400-800
< 300
300-400
400-800
Minimum 1
Protective Shade
7
8
10
11
7
10
10
10
8
8
10
10
11
6
8
10
11
8
9
10
3
2
14
As a rule of thumb, start with a shade that is too dark to see the weld zone. Then go to a lighter shade
which gives sufficient view of the weld zone without going below the minimum. 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 in the visible light of the (spectrum) operation.
2
These values apply where the actual arc is clearly seen. Experience has shown that lighter filters may
be used when the arc is hidden by the work piece.
Operations
Plate Thickness
Light Gas Welding
Medium Gas Welding
Heavy Gas Welding
Light Oxygen Cutting
Medium Oxygen Cutting
Heavy Oxygen Cutting
< 1/8 ” (3.2mm)
1
/8″- ½” (3.2-12.7mm)
> ½” (12.7mm)
< 1 (25mm)
1-6″ (25-150mm)
> 6″ (150mm)
Minimum 1 Protective
Shade
4
5
6
3
4
5
Construction Industry Lens Shades for Radiant Energy
Construction Industry Requirements for Filter Lens Shade Numbers for
Protection Against Radiant Energy
Welding Operation
Shielded metal-arc welding
1/16-, 3/32-, 1/8-, 5/32-inch diameter electrodes
Gas-shielded arc welding (nonferrous)
1/16-, 3/32-, 1/8-, 5/32-inch diameter electrodes
Gas-shielded arc welding (ferrous)
1/16-, 3/32-, 1/8-, 5/32-inch diameter electrodes
Shielded metal-arc welding
3/16-, 7/32-, 1/4-inch diameter electrodes
5/16-, 3/8-inch diameter electrodes
Atomic hydrogen welding
Carbon-arc welding
Soldering
Torch brazing
Light cutting, up to 1 inch
Medium cutting, 1 to 6 inches
Heavy cutting, more than 6 inches
Gas welding (light), up to 1/8-inch
Gas welding (medium), 1/8- to 1/2-inch
Gas welding (heavy), more than 1/2-inch
Source: 29 CFR 1926.102(b)(1) (www.OSHA.gov)
Shade
10
11
12
12
14
10 – 14
14
2
3 or 4
3 or 4
4 or 5
5 or 6
4 or 5
5 or 6
6 or 8
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