O&MM Fabricator - November/December 2017 - 32

people in the nation's workforce that are required
to wear a respirator. Yet according to DOL statistics, 66,000 workers suffer from exposure to
airborne contaminants each year.
First thing's first. A mask is not a respirator.
Respirators meet specific guidelines of efficacy, imposed by NIOSH. Still, they don't eliminate the problem; they literally just mask it, and
should be considered a last line of defense.
That said, there are some fairly effective types
of respirators.
Before we launch into a discourse on respirators, a quick glance at terminology will
be helpful.
Respirators are broadly classed into two
varieties. These are air purifying, which use
filters, cartridges or canisters to remove impurities from the air; and atmosphere supplying respirators which provide clean air from
an uncontaminated, self-contained source.
Beyond that, respirators are further categorized by the manner in which they are worn.
Tight-fitting respirators depend on a seal
between the respirator and face in order to
function properly. There are three kinds of tight
fitting respirators. (1) Filtering facepiece, which

work only for particulates; these are typically
discarded after use. (2) Half-facepiece elastomeric, which use replaceable filters for particulates, or cartridges for gases and vapors.
Half-facepiece models can be cleaned and
re-used. (3) Full facepiece elastomeric respirators. These also use filters and cartridges
but provide better protection than does the halffacepiece style. (4) Self-contained breathing
apparatus, better known as SCBA. These provide the highest level of protection, but unless
your shop is either under water or at ground
zero of a HAZMAT site, they may be overkill.
Loose fitting respirators don't depend on
any kind of seal but are used with a hood or
helmet. A good example of this type is the
Powered Air Purifying Respirator, or PAPR. It
pulls air through filters and pushes it into the
facepiece, hood or helmet. Welding helmets
are available with these respirators built into
them. They're also a good option for men with
beards since they don't require a tight seal
against the face.
Airline respirators are another kind of loose
fitting respirator (although there are some
airline respirators that use a tight fitting mask).

Housekeeping
The last part to the challenge of clean air is
basic shop hygiene. Despite the best efforts of
air cleansers or exhaust ventilation systems,
there will still be some residual settled dust.
A good commercial vacuum with a HEPA filter
will take care of this. Don't even think about
using a shop vac, which only takes settled dust
and sprays it, in even finer particles, back into
the air. And one more thing. Always wash your
hands before taking a lunch break or handling
food; your lungs aren't the only way contaminants can enter your body. For contaminants
that can be absorbed through the skin, it's best
to wash your hands with cold water, which
closes the pores.

Variable Speed
Ultimate Tubing Notcher
Model 400-VSUADJ w/Adjustable Height Vise Shown

>

Notches from
3/4i to 2-1/2i OD
>

They don't use filters but instead rely on a hose
connected to a cylinder to provide fresh air to
the wearer. NIOSH only approves supplied-air
type respirators for abrasive blasting.
So if tight-fitting respirators depend on
proper fit to be effective, how do you know
if the fit is, indeed, proper? Ideally, you
should perform what's known in govspeak
as a qualitative fit test (QLFT). The formal
taxonomy notwithstanding, this is nothing
more than donning the respirator and then
going through a short repertoire of motions.
These include normal breathing, deep breathing, shaking your head, nodding your head,
bending or jogging in place, talking, and then
some more normal breathing. You do all this
while someone waves an OSHA approved
test agent in front of your nose. Accepted
test agents are isoamyl acetate, for organic
vapors; saccharin or bitter, for particulates;
and irritant smoke.
Obviously, this is a cumbersome chore
and most employers would rather the worker
be doing something more productive, like
fabricating.

1-1/2HP

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A Final Word
Before he succumbed to metal fume fever
from breathing zinc oxide smoke, Paw Paw
Wilson recorded a final shop demo. Herein is
the eerie prologue.
"Well folks. This is a hell of a way to do
a demo. I did something stupid that I knew
better than to do, thinking I was tougher than
a little smoke. Well, I miscalculated and now
I am dead."
Indeed.
Footnote:

1	 Fabricator, Sept/Oct 2010

32 | November/December 2017 * O&MM Fabricator

755976_Mittler.indd 1

8/1/15 5:44 AM


http://www.mittlerbros.com http://www.mittlerbros.com

Table of Contents for the Digital Edition of O&MM Fabricator - November/December 2017

President’s Letter
Letter From the Executive Director
NOMMA Network
NOMMA Education Foundation
First Look: 2018 Metalfab / Fencetech Attendee Brochure
It's in the Air
A Fabricator’s Ergonomics
Seven Costly Management Mistakes
Supplier Members
New & Returning NOMMA Members & Iron Club Members
Gold Members
High-Tech Laser Machine Allows Business to Boost Productivity and Expand Product Offerings
Index of Advertisers
O&MM Fabricator - November/December 2017 - intro
O&MM Fabricator - November/December 2017 - cover1
O&MM Fabricator - November/December 2017 - cover2
O&MM Fabricator - November/December 2017 - 3
O&MM Fabricator - November/December 2017 - 4
O&MM Fabricator - November/December 2017 - 5
O&MM Fabricator - November/December 2017 - 6
O&MM Fabricator - November/December 2017 - 7
O&MM Fabricator - November/December 2017 - 8
O&MM Fabricator - November/December 2017 - 9
O&MM Fabricator - November/December 2017 - 10
O&MM Fabricator - November/December 2017 - President’s Letter
O&MM Fabricator - November/December 2017 - 12
O&MM Fabricator - November/December 2017 - Letter From the Executive Director
O&MM Fabricator - November/December 2017 - 14
O&MM Fabricator - November/December 2017 - NOMMA Network
O&MM Fabricator - November/December 2017 - NOMMA Education Foundation
O&MM Fabricator - November/December 2017 - 17
O&MM Fabricator - November/December 2017 - 18
O&MM Fabricator - November/December 2017 - First Look: 2018 Metalfab / Fencetech Attendee Brochure
O&MM Fabricator - November/December 2017 - 20
O&MM Fabricator - November/December 2017 - 21
O&MM Fabricator - November/December 2017 - 22
O&MM Fabricator - November/December 2017 - 23
O&MM Fabricator - November/December 2017 - 24
O&MM Fabricator - November/December 2017 - 25
O&MM Fabricator - November/December 2017 - 26
O&MM Fabricator - November/December 2017 - 27
O&MM Fabricator - November/December 2017 - 28
O&MM Fabricator - November/December 2017 - 29
O&MM Fabricator - November/December 2017 - It's in the Air
O&MM Fabricator - November/December 2017 - 31
O&MM Fabricator - November/December 2017 - 32
O&MM Fabricator - November/December 2017 - 33
O&MM Fabricator - November/December 2017 - 34
O&MM Fabricator - November/December 2017 - 35
O&MM Fabricator - November/December 2017 - A Fabricator’s Ergonomics
O&MM Fabricator - November/December 2017 - 37
O&MM Fabricator - November/December 2017 - 38
O&MM Fabricator - November/December 2017 - 39
O&MM Fabricator - November/December 2017 - 40
O&MM Fabricator - November/December 2017 - Seven Costly Management Mistakes
O&MM Fabricator - November/December 2017 - 42
O&MM Fabricator - November/December 2017 - 43
O&MM Fabricator - November/December 2017 - 44
O&MM Fabricator - November/December 2017 - Supplier Members
O&MM Fabricator - November/December 2017 - 46
O&MM Fabricator - November/December 2017 - New & Returning NOMMA Members & Iron Club Members
O&MM Fabricator - November/December 2017 - 48
O&MM Fabricator - November/December 2017 - Gold Members
O&MM Fabricator - November/December 2017 - 50
O&MM Fabricator - November/December 2017 - High-Tech Laser Machine Allows Business to Boost Productivity and Expand Product Offerings
O&MM Fabricator - November/December 2017 - 52
O&MM Fabricator - November/December 2017 - Index of Advertisers
O&MM Fabricator - November/December 2017 - 54
O&MM Fabricator - November/December 2017 - cover3
O&MM Fabricator - November/December 2017 - cover4
http://www.nxtbook.com/naylor/NOMS/NOMS0518
http://www.nxtbook.com/naylor/NOMS/NOMS0418
http://www.nxtbook.com/naylor/NOMS/NOMS0318
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http://www.nxtbook.com/naylor/NOMS/NOMS0617
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http://www.nxtbook.com/naylor/NOMS/NOMS0317
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http://www.nxtbook.com/naylor/NOMS/NOMS0616
http://www.nxtbook.com/naylor/NOMS/NOMS0516
http://www.nxtbook.com/naylor/NOMS/NOMS0416
http://www.nxtbook.com/naylor/NOMS/NOMS0316
http://www.nxtbook.com/naylor/NOMS/NOMS0216
http://www.nxtbook.com/naylor/NOMS/NOMS0116
http://www.nxtbook.com/naylor/NOMS/NOMS0615
http://www.nxtbook.com/naylor/NOMS/NOMS0515
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