Inspection of Wire Rope Slings
- Missing or illegible sling identification
- Excessive broken wires
- Severe localized abrasion or scraping
- Kinking, crushing, bird caging or any other damage resulting in damage to rope structure
- Evidence of heat damage
- End attachments that are cracked, deformed or worn
- Severe corrosion of the rope, end attachments, or fittings
- Other conditions, including visible damage, that cause doubt as to the continued use
ASME B30.9 outlines the inspection of wire rope slings:
- Initial inspection: Prior to use, all new, altered, modified, or repaired slings shall be inspected by a designated person. Written records are not required.
- Frequent inspection: A visual inspection for damage shall be performed by the user or other designated person each day or shift the sling is used. Any condition that may result in a hazard shall cause the rigging hardware to be removed from service. Written records not required.
Periodic inspection: A complete inspection for damage to the sling shall be periodically performed by a designated person. Inspection shall be performed on the entire length including splices, end attachments, and fittings. The sling shall be examined and a determination made as to whether they constitute a hazard. Written records of periodic inspection intervals shall not exceed one year. The frequency of periodic inspections should be based on:
- Frequency of sling use
- Severity of service
- Nature of lifts being made
- Experience gained
Broken Wires Removal Criteria:
Strand laid and single part slings – 10 randomly broken wires in one lay or 5 wires in one strand in one rope lay is cause for removal.
6 part braid – 20 per braid length – 8 part braid – 40 per braid length