INSPECTION, TESTING AND MAINTENANCE
GENERAL
B. Care shall be taken when inspecting sections
of rapid deterioration such as flange points,
crossover points, and repetitive pickup points
on drums.
32. Periodic inspection
A. The inspection frequency shall be determined
by a qualified person and shall be based on
such factors as
1. expected rope life as determined by
experience on the particular installation or
similar installations
2. severity of environment
3. percentage of capacity lifts
4. frequency rates of operation
5. exposure to shock loads
Inspection need not be at equal calendar
intervals and should be more frequent as the
rope approaches the end of it's service life.
This inspection shall be made at least
annually.
B. Periodic inspection shall be performed by a
designated person. This inspection shall cover
the entire length of the rope. Only the surface
wires need be inspected. No attempt should be
made to open the rope. Any deterioration
results in appreciable loss of original strength,
such as described below, shall be noted and
determination made as to whether use of the
rope would constitute a hazard: points listed
above reduction of rope diameter below
nominal diameter due to loss of core support,
internal or external corrosion, or wear of
outside wires; severely corroded, cracked,
bent, worn or improperly applied connections;
C. Care shall be taken when inspecting sections
subject to rapid deterioration such as the
following:
1. sections in contact with saddles, equalizer
sheaves, or other sheaves where rope
travel is limited
2. sections of the rope at or near terminal
ends where corroded or broken wires may
protrude
ROPE REPLACEMENT
33. No precise rules can be given for determination
of the exact time for replacement of rope, since
many variable factors are involved.
Continued use in this respect depends upon good
judgement by a designated person in evaluating
remaining strength in a used rope after allowance
for deterioration disclosed by inspection.
Continued rope operation depends upon this
remaining strength.
34. Conditions such as the following shall be
reason for questioning continued use of the
rope or increasing the frequency of inspection:
A. in running ropes, six randomly distributed
broken wires in one lay or three broken wires
in one strand in one lay
B. one outer wire broken at the contact point with
the core of the rope structure and protrudes or
loops out of the rope structure. Additional
inspection of this section is required
C. wear of one third of the original diameter of the
outside individual wire
D. kinking, crushing, birdcaging, or any other
damage resulting in distortion of the rope
structure
E. evidence of any heat damage from any cause
F. reduction from nominal diameter of more than
1/64 in. (0.4mm) for diameters up to and
including 5/16 in. (8 mm), 1/32 in. (0.8 mm) for
diameter 3/8 in. (9.5 mm) to and including 1/2
in. (13 mm), 3/64 in. (1.2 mm) for diameter
9/16 in. (14.5 mm) to and including 3/4 in. (19
mm). 1/16 in. (1.6 mm) for diameter 7/8 in. (22
mm) to and including 11/8 in. (29 mm), 3/32 in.
(2.4 mm) for diameters 11/4 in. (32 mm) to and
including 11/2 in. (38 mm)
G. In standing ropes, more than two broken wires
in one lay in sections beyond end connections
or more than one broken wire at an end
connection.
2-13.0.0
05/23/2003
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