Inspection of Chain Mesh Slings
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|
|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:
- missing or illegible sling identification.
- cracks or breaks.
- excessive wear, nicks, or gouges.
- stretched chain links or fittings.
- bent, twisted, or deformed chain links or fitting.
- evidence of heat damage.
- excessive pitting or corrosion.
- lack of ability of chain or fittings to hinge freely.
- weld slatter.
- other conditions, including visible damage, that cause doubly as to the continued use of the sling.
- broken or damaged connection steel cables.
- any damage to the shaft rods in SLIM CMSS fittings.
- a 15% reduction of the original cross-sectional area of any point around the hook opening of the end fitting.
- visible distortion of either end fitting out of its plane.
For sling inspection, re-certification and proof testing call Unirope®