Miller ARC PAK 350 Gebruikershandleiding - Pagina 5
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SECTION
1
-
SAFETY RULES FOR OPERATION OF
ARC
WELDING POWER SOURCE
1-1.
INTRODUCTION
We learn
by
experience. Learning safety through
per
sonal
experience,
like
a
child
touching
a
hot
stove
is
harmful,
wasteful,
and unwise. Let the
experience
of oth
ers
teach
you.
Safe
practices developed
from
experience
in the
use
of
welding
and
cutting
are
described in this manual. Re
search~
development,
and
field
experience
have
evolved reliable
equipment
and safe
installation,
opera
tion,
and
servicing practices.
Accidents
occur
when
equipment
is
improperly
used
or
maintained. The
rea
son
for the safe
practices
may
not
always
be
given.
Some
are
based
on common
sense,
others
may
require
technical volumes
to
explain.
It is wiser
to
follow the
rules.
Read and understand these safe
practices
before
at
tempting
to
install, operate,
or
service
the
equipment.
Comply
with these
procedures
as
applicable
to the
par
ticular
equipment
used and their instruction
manuals,
for
personal
safety
and for the
safety
of others.
Failure
to observe
these safe
practices
may
cause
seri
ous
injury
or
death. When
safety
becomes
a
habit,
the
equipment
can
be used with confidence.
These safe
practices
are
divided into
two
Sections:
1-General
Precautions,
common
to
arc
welding
and
cut
ting;
and 2-Arc
Welding (and Cutting) (only).
Reference standards: Published Standards
on
safety
are
also available for additional and
more
complete
pro
cedures than those
given
in
this manual.
They
are
listed
in the
Standards
Index in this manual. ANSI Z49.1
is the
most
complete.
The National
Electrical
Code,
Occupational Safety
and
Health
Administration,
local industrial
codes,
and
local
inspection
requirements
also
provide
a
basis
for
equip
ment
installation,
use, and
service.
12.
GENERAL PRECAUTIONS
Different
arc
welding
processes, electrode
alloys,
and fluxes
can
produce
different
fumes,
gases,
and
radiation levels. in addition
to
the Information In this
manual,
be
sure
to
consult flux and electrode
manu
facturers Material
Safety
Data Sheets
(MSDSs)
for
specific
technical data and
precautionary
measures
concerning
their material.
A.
Burn Prevention
Wear
protective
clothing-gauntlet
gloves
designed
for
use
in
welding,
hat,
and
high safety-toe
shoes. Button
shirt collar and
pocket flaps,
and
wear
cuff less trousers
to
avoid
entry
of
sparks
and
slag.
Wear helmet
with
safety goggles
and
glasses
with side
shields
underneath,
appropriate
filter lenses
or
plates
(protected by
clear
cover
glass).
This
is
a
MUST for
welding
or
cutting, (and chipping)
to
protect
the eyes
from radiant
energy and
flying
metal.
Replace
cover
glass
when
broken,
pitted,
or
spattered.
See 1-3A.2.
Avoid
oily
or
greasy
clothing.
A
spark
may
ignite
them.
Hot metal such
as
electrode stubs and
workpieces
should
never
be handled without
gloves.
Medical first aid
and
eye
treatment.
First aid facilities and
a
qualified
first aid person should be available for each
shift unless medical facilities
are
close
by
for immediate
treatment of
flash burns of the eyes and skin burns.
Ear
plugs
should be
worn
when
working
on
overhead
or
in
a
confined space.
A
hard hat should be
worn
when
others work overhead.
Flammable hair
preparations
should
not
be used
by
per
sons
intending
to
weld
or
cut.
B.
Toxic Fume Prevention
Severe
discomfort,
illness
or
death
can
result from
fumes,
vapors,
heat,
or
oxygen enrichment
or
depletion
that
welding (or cutting)
may
produce.
Prevent them
with
adequate
ventilation
as
described
in
ANSI Standard
Z49.1 listed
in
Standards
Index. NEVER ventilate with
oxygen.
Lead
-,cadmium-, zinc-,
mercury-, and
beryllium-bear
ing
and similar
materials,
when welded
(or cut)
may pro
duce harmful concentrations of toxic fumes.
Adequate
local
exhaust ventilation
must be
used,or
each person in
the
area as
well
as
the
operator
must
wear an
air-sup
plied respirator.
For
beryllium,
both
must
be used.
Metals coated with
orcontaining
materials
that emit toxic
fumes should
not
be heated unless
coating
is removed
from the work
surface,
the
area
is well ventilated
and,
if
necessary, while
wearing
an
air-supplied respirator.
Work
in
a
confined space
only
while it is
being
ventilated
and,
if
necessary,
while
wearing
an
air-supplied respira
tor.
Gas
leaks in
a
confined space should be avoided.
Leaked gas
in
large
quantities
can
change
oxygen
con
centration
dangerously.
Do
not
bring
gas
cylinders
into
a
confined space.
Leaving
confined
space,
shut OFF
gas
supply
at
source
to
prevent
possible
accumulation of gases
in
the space if
downstream valves have been
accidentally
opened
or
left open.
Check
to
be
sure
that the space is safe before
re-entering
it.
Vapors
from
chlorinated solvents
can
be
decomposed
by
the heat of the
arc
(or flame)
to form
PHOSGENE,
a
highly
toxic gas, and other
lung
and eye
irritating prod
ucts.
The ultraviolet
(radiant)
energy
of the
arc can
also
decompose trichloroethylene
and
perchloroethylene
vapors
to
form
phosgene.
DO NOT WELD
or
cut
where
solvent vapors
can
be drawn into the
welding
or
cutting
atmosphere
or
where the radiant energy
can
penetrate
OM-126
853
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