Dando DUKE STAGE IV, Руководство по эксплуатации и техническому обслуживанию, Страница: 24 / 400

r. When equipment using wire rope is kept in dead storage for any length of
time, the rope should not be left on the equipment.
s. Connections, fittings, fastenings, parts etc. used in conjunction with cables
and ropes should be of good quality and of proper size and strength and
should be installed in accordance with the recommendation of the
manufacturer.
t. Socketing, splicing and sizing of wire rope should be performed by qualified
persons.
u. All eye splices should contain the proper size of rope thimble.
v. When wire rope c
lips are used, the base of the clip must bear on the “live”
end of the rope -
the “live” end being the free-running portion of the rope. The
“U” section of the clip bears on the dead end of termination fold of the rope.
Failure to follow this procedure cou
ld cause the “U” bolt to kink or cut the live
end of the anchor and cause failure.
w.
Spacing of the clips, or “U” Bolts, is also important. They should be installed
about six rope diameters apart, and tightened securely before the rope is
placed in tension - and tightened again after the rope is put into use. The
pulling on the rope can cause a slight reduction in its diameter with a
resultant loosening of the clips.
x. When a wedge socket-type of fastening is used, the dead of shortened end
of the rope should be clipped with a U-bolt or otherwise made secure against
loosening.
y. Winch ropes should not be lopped, knotted, or kinked around themselves or
any other object except suit
ably designed “D” etc.
z. Lifting hooks or shackles should be attached to the winch rope via a swivel
connection which can operate under maximum load.
aa. Whenever possible, new wire rope should be run under light load for a short
period after it has been installed in order to adjust the rope to working
conditions.
bb. Sudden, severe stresses are damaging to wire rope and such applications
should be reduced to a minimum. A jerk line may be rigged and clamped to
the drilling line when it is necessary to have considerable jarring in one place.
cc. Experience has indicated that wear increases with speed: economy results
from moderately increasing the load and diminishing the speed.
dd. All winch ropes should be checked from time to time for excessive wear and
be replaced when necessary.
ee. Personnel should be kept a safe distance from lines being used for hoisting
and pulling. They should never straddle them of reach across them, since
serious injuries can result from the whiplash of a line that either breaks or is
loosened suddenly. When straightening cable of winding it onto a hoist
drum, the operator should be constantly alert at the controls.
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