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to Inspection
Criteria and Sling Properties Main Page |
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| 1. |
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Tell-Tails, if installed in the type
of sling, should extend 1/2" past the tag area of each sling. If both
Tell-Tails are not 1/2" long remove the sling from service. If the
Tell-Tails show evidence of chemical degradation, remove the sling from
service. Send to manufacturer for repair evaluation. |
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| 2. |
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Slings should be inspected for evidence
of cutting or tearing of the outer cover. Slings with cuts should be removed
from service and sent back to the manufacturer for repair evaluation. Damage
to the cover may indicate core damage. |
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| 3. |
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Inspect slings for evidence of heat
damage. Slings with polyester or Covermax covers should not be exposed to
temperature above 82°C/180°F. Aramid Sparkeater Slings should not
be exposed to temperatures over 149°C/300°F. K-Spec Core Slings
should not be exposed to temperatures above 82°C/180°F. Cold temperature
exposure down to minus 40°C/minus 40°F do not effect the strength
of the products. Other temperatures should be referred to the manufacturer. |
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| 4. |
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Slings using aluminum fittings shall
not be used where fumes, vapors, sprays, or mists of alkalis or acids are
present. |
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| 5. |
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Twin-Path® and Uni-Path® Lifting
Slings and any fittings attached should be the subject of frequent and regular
inspections. In addition to the initial inspection by a competent person
and frequent written inspections, the slings should be visually inspected
before each use. |
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| 6. |
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Written inspections should be performed
as required and documents of such inspection by a competent person shall
be kept on file in the safety department of the plant or site where used.
Inspections may be done more often based on frequency of use, severity of
conditions, experience of past service life. |
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| 7. |
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Slings should be examined throughout
their length of abrasion, cuts, heat damage, fitting distortion or damage,
tag legibility, and if any doubts are held by the inspector, the sling should
be removed from service. Core integrity is determined by fiber optic light
transfer if this type of tell-tail is installed in the sling. If a deterioration
is found, the sling must be removed from service and returned to Unirope®
for evaluation. |
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| 8. |
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Slings removed from service that are
not capable of repair should be destroyed and rendered completely unfit
for future use. |
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| 9. |
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Abrasion, heat damage or cuts to the
cover may indicate a loss of strength to the load core and these slings
should not be used until evaluated by the Unirope®. At area of damage,
Unirope® will open the cover and have the core yarns counted and visually
inspected. |
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| Uni-Path® and
all other roundslings are constructed from a single load carrying
yarn bundle. ANY damage to this bundle may result in sling failure. |
Twin-Path® slings
are constructed from 2 or more INDIVIDUAL load bundles and are actually
two or more separate slings in one. There is unique backup protection. |
If the outer cover
is damaged the sling should be taken out of service. Shown above is
a double cover with contrasting colours. Some Roundslings have a single
cover ONLY. |
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| Uni-Path® and
Twin-Path® slings can be repaired with patches like this. Each
sling is proof tested by us after repair. Do NOT attempt to repair
slings yourself! |
Traditional Shrink
Tails disappear when the sling has been overstretched. This type is
standard on all Twin-Path® slings with Polyester load fibers. |
The combination
of Fiber Optic Tell Tails and traditional Shrink Tails is standard
on Twin-Path® slings with K-SPEC yarns. The fiber optic cable
runs through the entire sling length. If no light travels through
the cable then there is the potential of core yarn damage. |
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