Michigan Administrative Code
Department - Labor and Economic Opportunity
MIOSHA
General Industry and Construction Safety and Occupational Health Standards
General Industry Safety Standards
Part 33 - PERSONAL PROTECTIVE EQUIPMENT
EYE AND FACE PROTECTION
Section R. 408.13312a - Filter lenses
Current through Vol. 24-16, September 15, 2024
Rule 3312a.
(1) An employer shall ensure that each affected employee uses equipment that has filter lenses which have shade numbers appropriate for the work being performed for protection from injurious light radiation.
(2) Table 1 is a listing of appropriate shade numbers for various operations.
(3) Table 1 reads as follows:
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TABLE 1 FILTER LENSES FOR PROTECTION AGAINST RADIANT ENERGY |
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|
OPERATIONS |
PLATE THICKNESS (INCHES) |
PLATE THICKNESS (MM) |
MINIMUM* PROTECTIVE SHADE |
|
Gas Welding: |
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|
Light |
Under 1/8 |
Under 3.2 |
4 |
|
Medium |
1/8 to 1/2 |
3.2 to 12.7 |
5 |
|
Heavy |
Over 1/2 |
Over 12.7 |
6 |
|
Oxygen Cutting |
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|
Light |
Under 1 |
Under 25 |
3 |
|
Medium |
1 to 6 |
25 to 150 |
4 |
|
Heavy |
Over 6 |
Over 150 |
5 |
|
OPERATIONS |
ELECTRODE SIZE 1/32 IN. |
ARC CURRENT |
MINIMUM* PROTECTIVE SHADE |
|
Less than 3 |
Less than 60 |
7 |
|
|
Shield metal |
3 to 5 |
60 to 160 |
8 |
|
Arc welding |
more than 5 to 8 |
161 to 250 |
10 |
|
more than 8 |
251 to 550 |
11 |
|
|
Gas metal arc welding and flux |
cored arc |
Less than 60 60 to 160 |
7 10 |
|
welding |
161 to 250 |
10 |
|
|
251 to 500 |
10 |
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|
Gas tungsten arc |
Less than 50 |
8 |
|
|
welding |
50 to 150 |
8 |
|
|
151 to 500 |
10 |
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|
Air carbon |
(Light) |
Less than 500 |
10 |
|
Arc cutting |
(Heavy) |
500 to 1000 |
11 |
|
Plasma arc welding |
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|
20 to 100 |
8 |
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|
101 to 400 |
10 |
||
|
401 to 800 |
11 |
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|
Plasma arc cutting |
(Light)** |
Less than 300 |
8 |
|
(Medium)** |
300 to 400 |
9 |
|
|
(Heavy)** |
401 to 800 |
10 |
|
|
Torch brazing Torch soldering Carbon arc welding |
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|
3 |
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|
2 |
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|
14 |
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* As a rule of thumb, start with a shade that is too dark to see the weld zone. Then go to a lighter shade that gives a 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.
** These values apply where the actual arc is clearly seen. Experience has shown that light filters may be used when the arc is hidden by the workpiece.
