Environmental Engineering Reference
In-Depth Information
IntroductIon
There. are. such. a. myriad. of. safety. hazards. facing. employers. and. workers. within.
the.workplace.that.it.is.dificult.to.select.the.most.important.ones.and.thus.err.by.
leaving.out.ones.that.others.believe.are.signiicant..Although.great.detail.cannot.be.
provided.in.one.chapter,.it.is.the.intent.of.this.chapter.to.provide.enough.informa-
tion. to. set. the. tone. regarding. the. need. to. recognize. and. identify. safety. hazards..
If detailed.information.is.needed,.then.other.references.can.be.sought.by.the.reader.
ABrAsIve BlAstIng (29 cFr 1910.94 And 1910.244)
Abrasive. blasting. cleaning. is. in. wide. use. in. many. industries. and. presents. both. a.
physical. hazard. due. to. the. force. of. particles. being. propelled,. and. a. health. hazard.
depending.upon.what.material.(e.g.,.silica).is.used.to.abrade.the.article.
All. abrasive. blasting. cleaning. nozzles. are. to. be. equipped. with. an. operating.
valve. that. must. be. held. open. manually. and. should. operate. as. a. deadman. switch.
or. .positive-pressure. control.. A. support. should. be. provided. upon. which. the. nozzle.
can.be.mounted.when.not.in.use..All.abrasive.blasting.cleaning.enclosures.must.be.
exhaust.ventilated.in.such.a.way.that.a.continuous.inward.low.of.air.will.be.main-
tained.at.all.openings.in.the.enclosure.during.the.blasting.operation.
ABrAsIve Wheel equIPment/grInders
(29 cFr 1910.212, 1910.215, And 1910.243)
Grinding.wheels.rotate.at.high.speeds.and.have.the.potential.to.break.apart.(explode)..
Thus,.abrasive. wheel.machinery. and. portable.power.tools.should.only.be.used. on.
machines.provided.with.safety.guards,.with.the.following.exceptions:
.
1.. Wheels.used.for.internal.work.while.within.the.work.being.ground.
.
2.. Mounted.wheels,.used.in.portable.operations,.two.inches.(ive.centimeters).
and.smaller.in.diameter.
.
3.. Type.16,.17,.18,.18R,.and.19.cones,.plugs,.and.threaded-hole.pot.balls.where.
the.work.offers.protection.
Abrasive.wheel.machinery.and.portable.power.tool.safety.guards.must.cover.the.
spindle.end,.nut,.and.lange.projections,.except
.
1.. Safety.guards.on.all.operations.where.the.work.provides.a.suitable.measure.
of.protection.to.the.operator.may.be.so.constructed.that.the.spindle.end,.nut,.
and.outer.lange.are.exposed.
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