maintenance, and transfer of materials; the potential consequences of a fire
on line operations; the value of process equipment; and past accident
experience in similar operations.
b. Rate of rise, light-actuating, ultraviolet, or other quick action
devices for automatic control of deluge systems are recommended.
Such
automatic controls should be backed by quick-acting manual controls.
10. The distributing outlets of the deluge system (nozzles, spray, heads)
should be located as close to the exposed surface of the explosives as
possible, and should be consistent with the outlet discharge pattern. This
will ensure immediate drenching of all parts of the machine under extreme
conditions. When explosives are located under tight hoods or covers inside
machines, distributing outlets should be located inside the enclosed space.
11. Where explosive vapors, gases, or dusts may enter outlets and interfere
with their operation, internal non-metallic spring-held caps should be
placed on the outlets.
a. Their design must provide immediate release of the cap when pressure
is exerted within the outlet.
b. Caps with small nonferrous chains should be attached to outlets to
prevent loss of the cap.
PART D - INSPECT TOOLS, GAGES, AND HOUSEKEEPING
1.
Check that all hand tools that will be used during the maintenance
operation are in repair.
Hand tools are defined as tools that are
lightweight and can be handcarried, to include mechanical and electric
tools.
2.
Hand tools must be
made
of
good
quality
material
and
should
be
appropriate for the job.
a. Hand tools should be inspected frequently, kept in good repair and
tempered, dressed, or repaired by qualified personnel only.
b. Tools with sharp cutting edges or sharp points should have sheaths
for workers' protection.
c. Portable electric tools with exposed non-current carrying metal
parts should have a means of grounding.
Double insulated electric tools
need not be grounded, but the tool must be so identified.
16
MM4673
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