Web Slings

Inspection Criteria

Inspection Criteria for Web Slings (ASME B30.9-5.9 2006)

9-5.9.4 Removal Criteria
A Synthetic webbing sling shall be removed from service if conditions such as the following are present:

  1. Missing or illegible sling identification (see Section 9-5.7)
  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. Fittings that are pitted, corroded, cracked, bent, twisted, gouged, or broken
  10. For hooks, removal criteria as stated in ASME B30.10
  11. For rigging hardware, removal criteria as stated in ASME B30.26
  12. Other conditions, including visible damage, that cause doubt as to the continued use of the sling.


9-5.9.1 Initial Inspection
Prior to use, all new, altered, modified, or repaired slings shall be inspected by a designated person to verify compliance with the applicable provisions of this Chapter.


9-5.9.2 Frequent Inspection

  1. A visual inspection for damage shall be performed by the user or other designated person each day or shift the sling is used.
  2. Conditions such as those listed in paragraph 9-5.9.4 or any other condition that may result in a hazard shall cause the sling to be removed from service.  Slings shall not be returned to service until approved by a qualified person.
  3. Written records are not required for frequent inspections.


9-5.9.3 Periodic Inspection

    • A complete inspection for damage to the sling shall be periodically performed by a designated person.  Each sling and component shall be examined individually, taking care to expose and examine all surfaces.  The sling shall be examined for conditions such as those listed in paragraph 9-5.9.4 and a determination made as to whether they constitute a hazard.
    • Periodic inspection frequency.  Periodic inspection intervals shall not exceed 1 year.  The frequency of periodic inspections should be based on:
  1. Frequency of sling use
  2. Severity of service conditions
  3. Nature of lifts being made
  4. Experience gained on the service life of slings used in similar circumstances
  • Guidelines for the time intervals are:
  1. Normal service – yearly
  2. Severe service – monthly to quarterly
  3. Special service – as recommended by a qualified person
  • A written record of the most recent periodic inspection shall be maintained.