Unirope  Chain Mesh Sling Inspection Criteria (based on ASME B30.9-1)

Worn or abraided chain links.

Gouged and nicked chain links.

Stretched links due to overloading the sling

Replace scorred and indented CMSS shaft rods

Replace for broken tie-cables, distorted mesh structure

Use of Grade 100 Alloy Chain Mesh Slings in hot environments
Temperature of Chain in degree Temporary Reduction of Rated Load while at Temperature Permanent Reduction of Rated Load after Exposure to Temperature
Celsius  °C Fahrenheit  °F
Below 204 Below 400 None None
204 400 15% None
260 500 25% 5%
316 600 30% 15%
371 700 40% 20%
427 800 50% 25%
482 900 60% 30%
538 1000 70% 35%
Over 538 Over 1000 Remove from Service Remove from Service

Chain slings shall be removed from service if any of the following conditions are present:

  1. missing or illegible sling identification.
  2. cracks or breaks.
  3. excessive wear, nicks, or gouges.
  4. stretched chain links or fittings.
  5. bent, twisted, or deformed chain links or fitting.
  6. evidence of heat damage.
  7. excessive pitting or corrosion.
  8. lack of ability of chain or fittings to hinge freely.
  9. weld slatter.
  10. other conditions, including visible damage, that cause doubly as to the continued use of the sling.
  11. broken or damaged connection steel cables.
  12. any damage to the shaft rods in SLIM CMSS fittings.
  13. a 15% reduction of the original cross-sectional area of any point around the hook opening of the end fitting.
  14. visible distortion of either end fitting out of its plane.

For sling inspection, re-certification and proof testing call Unirope®