Environmental Engineering Reference
In-Depth Information
tABle 24.1
Function of various types of Protective eyewear
operation
hazards
recommended Protectors: (see Figure 21-2)
Acetylene-burning
Sparks,.harmful.rays,.
molten.metal,.lying.
particles
7,.8,.9
Acetylene-cutting
Acetylene-welding
Chemical.handling
Splash,.acid.burns,.fumes
2,.10.(For.severe.exposure.add.10.over.2)
Chipping
Flying.particles
1,.3,.4,.5,.6,.7A,.8A
Electric.(arc).welding
Sparks,.intense.rays,.
molten.metal
9,.11.(11.in.combination.with.4,.5,.6.in.tinted.
lenses.advisable)
Furnace.operations
Glare,.heat,.molten.metal
7,.8,.9.(For.severe.exposure.add.10)
Grinding-light
Flying.particles
1,.3,.4,.5,.6,.10
Grinding-heavy
Flying.particles
1,.3,.7A,.8A.(For.severe.exposure.add.10)
Laboratory
Chemical.splash,.glass
2.(10.when.in.breakage.combination.with.4,.5,.6)
Machining
Flying.particles
1,.3,.4,.5,.6,.10
Molten.metals
Heat,.glare,.sparks,.splash
7,.8.(10.in.combination.with.4,.5,.6.in.tinted.
lenses)
Spot.welding
Flying.particles,.sparks
1,.3,.4,.5,.6,.10
Source:
. Courtesy.of.the.United.States.Department.of.Energy.
tABle 24.2
Filter shades for radiant energy Protection
shade
number
Welding operation
Shielded.metal-arc.welding.1/18-,.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
12
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.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.to.1/2.inch
5.or.6
Gas.welding.(heavy),.over.1/2.inch
6.or.8
Source:
Courtesy.of.the.United.States.Department.of.Energy.
