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Cargo Ratchet Assemblies
Polyester Round Slings
| Inspection
of Round Slings |
INSPECTION
OF POLYESTER ROUND SLINGS:
WEB SLING AND TIE DOWN ASSOCIATION
Type
of Inspection
a. Initial Inspection - Before any polyester round sling
is placed into service it shall be inspected by a design a person to ensure
that the correct round sling is being used, as well as to determine that
the round sling meets requirements of this specification.
b. Frequent Inspection - This inspection shall be made by
a qualified person handling the polyester round sling time the round sling
is used.
c. Periodic Inspection - This inspection shall be conducted
by a designated person. Frequency of inspection should be based on:
1. Frequency of use
2. Severity of service conditions
3. Experience gained on service life of polyester round sling used
in similar applications.
4. Periodic inspection should be conducted at least monthly.
Removal
from Service
A polyester round sling shall be removed from service if any
of the following is visible:
a. If polyester round sling identification from service if any
of the following is visible:
b. Melting, charring or weld spatter of any part of the polyester
round sling.
c. Holes, tears, cuts, embedded particles, abrasive wear, or snags
that expose the core fibers of the polyester sling.
d. Broken or worn stitching in the cover which exposes the core
fibers.
e. Fittings when damaged, stretched or distorted in any way.
f. Polyester round sling that are knotted.
g. Acid or alkali burns of the polyester round sling.
OPERATION
OF POLYESTER ROUND SLINGS:
WEB SLING AND TIE DOWN ASSOCIATION
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Operating
Practices
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- Determine
weight of the load. The weight of the load shall be within the
rated capacity of the polyester round slings(s).
- Select a
polyester round sling having suitable characteristics for the
type of load, hitch and environment.
- Polyester
round slings shall not be loaded in excess of the rated capacity.
Consideration shall be given to the round sling to load angle
which affects rated capacities. (See 2. 10.5)
- Polyester
round slings with fittings which are used in a choking hitch shall
be of sufficient length to assure that the choking action is on
the round sling, and never on the fittings.
- Polyester
round slings used in a basket hitch shall have the ,~ load balanced
to prevent slippage.
- The openings
in fittings shall be the proper shape and size to ensure that
the fittings will seat properly on the polyester round sling,
crane hook, or other attachments.
- Polyester
round slings shall always be protected from being cut by sharp
corners, sharp edges, protrusions, or abrasive surfaces.
- Polyester
round slings shall not be dragged on the floor or over an abrasive
surface.
- Polyester
round slings shall not be twisted, shortened, lengthened, tied
into knots, or joined by knotting.
- Polyester
round slings shall not be pulled
from under heavy loads when the load is resting on the polyester
round sling.
- Do not drop
polyester round slings equipped with metal fittings.
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- Polyester
round slings that appear to be damaged shall I be used unless
inspected and accepted as usable under Section 4.4 and 4.5.
- The polyester
round sling shall be hitched in a manner providing control of
the load.
- Personnel,
including all portions of the human body, should be kept from
between the polyester round
sling and the load, and from between the polyester round sling
and the crane hook or hoist hook. Personnel shall stand clear
of suspended load.
- Personnel
shall not ride the polyester round sling.
- Shock loading
shall be avoided.
- Twisting
the legs (branches) shall be avoided.
- Load applied
to a hook shall be centered in the bowl of t hook to hook to prevent
point loading.
- During lifting,
with or without the load, personnel shall alert for possible snagging
of the polyester round sling.
- The polyester
round slings shall be long enough so the r capacity is adequate
when the sling to load angle is take into consideration. (See
2.10.5)
- Only Polyester
round slings with legible identification tags shall be used.
- Tags and
labels should be kept away from the load, hook and point of choke.
- Polyester
round slings shall not be constricted or bunched between the ears
of a cleaves or shackle, or in a hook. When a polyester round
sling is used with a shackle, it is recommended that it be used
(rigged) in the bow of the shackle.
- Place blocks
under load prior to setting down the load, to allow removal of
the polyester round slings, if applicable.
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INSPECTION
OF SYNTHETIC WEB SLINGS ASME B30.9C 1994
Type
of Inspection
a. Frequent inspection - This inspection should be
made by the person handling the sling each day the sling is used.
b. Periodic inspection - This inspection should be conducted by
designated personnel. Frequency of inspection should be based on:
1. Frequency of sling use;
2. Severity of service conditions; and
3. Experience gained on the service life of slings used in similar
applications.
Periodic inspection should be conducted at least
annually.
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Inspection
Records. Written inspection records,
utilizing the
identification for each sling as established by the user, should be
kept for all slings. These records should show a description of the
new sling and its condition on each periodic inspection.
Removal Criteria. A sling shall be removed from service if
damage such as the following is visible and shall only be returned
to service when approved by a designated person.
a. Acid or charring burns
b. Melting or charring of any parts of the sling
c. Holes, tears, cuts or snags
d. Broken or worn stitching in load bearing splices
e. Excessive abrasive wear
f. Knots in any parts of the sling
g. Excessive pitting or corrosion, or cracked, distorted or
broken fittings
h. Other visible damage that causes doubt as to the strength
of the sling.
OPERATION
OF SYNTHETIC WEB SLING
ASME B30.9C 1994
Operating
Practices
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- Slings having
suitable characteristic for the type of load, hitch and environment
shall be selected in accordance with appropriate table.
- The weight
of load shall be within the rated load of the sling.
- Slings shall
be shortened, lengthened, or adjusted only by methods approved
by the sling manufacturer. Slings shall not be shortened or lengthened
by knotting.
- Sharp corners
in contact with the sling should be padded with material of sufficient
strength to minimize damage to the sling.
- Portions
of the human body should be kept from between the sling and the
load, and from between the sling and the crane hook or hoist hook.
- Personnel
should stand clear of the suspended load.
- Personnel
shall not ride the sling.
- Shock loading
should be avoided.
- Slings should
not be pulled from under a load when the load is resting on the
sling.
- Slings should
be stored in a cool, dry, and dark place to prevent environmental
damage.
- Twisting
and kinking the legs shall be avoided.
- Load applied
to the hook should be centered in the base (bowl) of hook to prevent
point loading on the hook.
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- During lifting,
with or without load, personnel shall be alert for possible snagging.
- In a basket
hitch, the load should be balanced to prevent slippage.
- The sling's
legs should contain or support the load from the sides above the
center of gravity when using a basket hitch.
- Slings should
be long enough so that the rated load is adequate when the angle
of the legs is taken into consideration.
- Slings should
not be dragged on the floor or over an abrasive surface.
- In a choker
hitch, slings shall be long enough so the choker fitting chokers
on the webbing and never on the other fittings.
- Nylon and
polyester slings shall not be used at temperatures in excess of
194F (90 C), or a temperature below -40F (-40 C).
- When extensive
exposure to sunlight or ultraviolet light is experienced by nylon
or polyester web slings, the sling manufacturer should be consulted
for recommended inspection procedures.
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"Reprinted
from ASME B30 .9-1990 by permission of
The American Society
of Mechanical Engineers."
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WIRE ROPE & SUPPLY, LLC