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| GENERAL
REQUIREMENTS AND INSPECTION CRITERIA FOR SLINGS |
| Safe
operating practices (OSHA 1910.184) - Whenever any
sling is used the following practices shall be observed |
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1.
Slings that are damaged or defective shall not be used.
2. Slings shall not be shortened with knots or bolts or other
makeshift devices.
3. Sling legs shall not be kinked.
4. Slings shall not be loaded in excess of their rated capacities.
5.
Slings used in a basket hitch shall have the loads balanced
to prevent slippage.
6. Slings shall be securely attached to their loads.
7. Slings shall be padded or protected from the sharp edges
of their loads.
8. Suspended loads shall be kept clear of all obstructions.
9. All employees shall be kept clear of loads about to be
lifted and of suspended loads.
10. Hands or fingers shall not be placed between the sling
and its load while the sling is being tightened around the
load.
11 Shock loading is prohibited.
12. A sling shall not be pulled from under a load when the
load is resting on the sling. |
| Inspections
- Each day before being used, the sling and all fastenings and
attachments shall be inspected for damage or defects by a competent
person designated by the employer. Additional inspections shall
be performed during sling use where service conditions warrant.
Damaged or defective slings shall be immediately removed from
service. |
| REMOVAL
CRITERIA |
| Wire
Rope Slings (ASME B30.9) - A wire rope sling shall
be removed from service if conditions such as the following
are present: |
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1.Missing
or illegible sling identification.
2. Broken Wires:
*For strand-laid and single-part
slings, ten randomly distributed broken wires in on rope lay,
or
five broken wires in on
stand in one rope lay.
*For cable-laid slings, 20 broken
wires per lay.
*For six-part braided slings,
20 broken wires per braid
*For eight-part braided slings,
40 broken wires per braid.
3. Severe localized abrasion or scraping.4.
Kinking, crushing, bird caging, or any other damage resulting
in damage to the rope structure.
5. Evidence of heat damage
6. End attachments that are cracked, deformed, or worn to
the extent that the strength of the sling is substantially
affected.
7. Severe corrosion of the rope, end attachments, or fittings.
8. for hooks, removal criteria at stated in ASME B30.10.
9. Other conditions, including visible damage, that cause
doubt as to the continued use of the sling. |
| Nylon
Web Slings (ASME B30.9) - A synthetic webbing sling
shall be removed from service if conditions such as the following
are present: |
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1. Missing
or illegible sling identification.
2. Acid or caustic burns.
3. Melting or charring of any part of the sling.
4. Holes, tears, cuts, or snags.
5. Broken or worn stitching in load bearing splices.
6. Excessive abrasive wear.
7. Knots in any part of the sling.
8. Discoloration and brittle or stiff areas on any part of
the sling, which may mean chemical or ultraviolet/sunlight
damage.
9. Fitting that are pitted, corroded, cracked, bent, twisted,
gouged, or broken.
10. For hooks, removal criteria as stated in ASME
B30.10
11. Other conditions, including visible damage, that cause
double as to the continued use of the sling. |
| Polyester
Round Slings (ASME B30.9) - A synthetic round sling
shall be removed from service if conditions such as the following
are present: |
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1.Missing
or illegible sling identification.
2. Acid or caustic burns.
3. Evidence of heat damage.
4.
Holes, tears, cuts, abrasive wear, or snags that expose the
core yarns.
5. Broken or damaged core yarns.
6. Weld splatter that exposes core yarns.
7. Round slings that are knotted.
8. Discoloration and brittle or stiff areas on any part of
the slings, which may mean chemical or ultraviolet/sunlight
damage.
9. Fitting that are pitted, corroded, cracked, bent twisted,
gouged, or broken.
10. For hooks, removal criteria as stated in ASME
B30.10
11. Other
conditions, including visible damage, that cause double as
to the continued use of the sling. |
| Alloy
Steel Chain Slings(ASME B30.9) - An alloy steel chain
sling shall be removed from service if conditions such as the
following are present: |
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1. Missing
or illegible sling identification.
2. Cracks or breaks
3. Excessive wear, nicks, or gouges.
4. Stretched chain links or components
5. Bent, twisted, or deformed chain links or components.
6. Evidence of hear damage.
7. Excessive pitting or corrosion.
8. Lack of ability of chain or components to hinge (articulate)
freely.
9. Weld splatter.
10. For hooks, removal criteria as stated in ASME
B30.10
11. Other conditions, including visible damage, that cause
double as to the continued use of the sling. |
| Wire
Mesh Slings (ASME B30.9) - A metal mesh sling
shall be removed from service if conditions such as the following
are present: |
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1. Missing
or illegible sling identification.
2. Broken weld or a broken brazed joint along the sling edge
3. Broken wire in any part of the mesh.
4. Reduction in wire diameter of 25% due to abrasion or 15%
due to corrosion.
5. Lack of flexibility due to distortion of the mesh.
6. Distortion of the choker fitting so the depth of the slot
is increased by more that 10%
7. Distortion of either end fitting so the width of the eye
opening is decreased by more than 10%
8. A 15% reduction of the original cross-sectional area of
any point around the hook opening of the end fitting.
9. Visible
distortion of either end fitting out of its plane.
10. Cracked end fitting.
11. Slings in which the spirals are locked or without free
articulation shall not be used.
12. Fitting that are pitted, corroded, cracked, bent, twisted,
gouged, or broken.
13. Other conditions, including visible damage, that cause
doubt as to the continued use of the sling. |
| For
additional information, please refer to the OSHA and ASME standards. |
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