Revision 1
9.
Equipment limitations -
It
should be recognized that protective equipment may not
necessarily protect the operator from injury by direct high pressure water jet impact.
G.
Pre-Operating Procedures
1.
Planning - Each job shall be preplanned. Personnel familiar with the equipment
to
be
cleaned or the material
to
be
cut and the work environment shall meet with the
personnel that will be doing the work and outline potential hazards of the work area,
environmental problems, safety standards, and emergency aid procedures.
2.
Check List - A check list shall be used to assure that the proper procedures and
proper equipment selection are followed. (See page 2-5.)
3.
Dump Valve - All systems shall incorporate at least one (1) fluid shut off or dump
device. The lance operator must always be able
to
shut down the water jet by releasing
pressure on the trigger, switch or foot valve pedal.
4.
Warning
barriers
- Barricades shall be erected
to
encompass the hazard area and
signs posted
to
warn personnel that they are entering a hazardous area. The perimeter
should be outside the effective range
of
the water jet wherever possible. Barriers may
be
of
rope, safety tape, barrels, etc., as long
as
they give an effective warning and are
highly visible.
5.
Hook-up
a.
Hose - Hose shall be arranged so a tripping hazard does not occur. Hoses, pipes and
fittings shall be supported to prevent excessive sway and/or wear created by vibration
or stress
of
the end connections when laid on the ground, over sharp objects or on
vertical runs.
b.
Fittings - All fittings shall be cleaned and lubricated before installing in the system.
Be sure all fittings, hoses and nozzles are fit for the purpose.
c.
Hose - All hoses shall be checked for evidence
of
damage, wear or imperfection. The
check shall be made periodically during the operation.
d.
Pre-flushing - The system shall be completely flushed with sufficient water
to
remove
any contaminants before installing the nozzle.
e.
Nozzle - All orifices shall be checked in all nozzles for any stoppage, damage or
imperfections.
f.
Electrical equipment - Any electrical equipment in the immediate area
of
the
operation that presents a hazard
to
the operator shall be de-energized, shielded or
otherwise made safe.
© Copyright January,
2001
NLB Corporation 2-20
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