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Wirerope Inspection

Wirerope Inspection image

TKS inspects marine wire rope in accordance with :

 

  • ISO 4309:2010 Wire Rope: Care and maintenance, inspection and discard
  • ASTM E 1571: Standard Practice for Electromagnetic Examination of Ferromagnetic Steel Wire Rope and
  • DIN EN 12927-6: Safety requirements for cable way inspections designed to carry persons

 

And other relevant standards using magnetic flux leakage, ultrasonic, acoustic emission and other visual techniques. Cross-sectional area loss is measure to assess a severity rating for the cable.

 

Decrease in Cross-Sectional Area (CSA) due to corrosion or wire breaks Severity Rating
6 x ø (~ 1 lay) 30 x ø 500 x ø Description Level
< 2% < 4% < 10% Slight 1
2% – 4% 4% – 6% 10% – 18% Medium 2
4% – 5% 6% – 8% 18% – 21% High 3
5% – 6% 8% – 10% 21% – 25% Very High 4
≥ 6% ≥ 10% ≥ 25% Discard 5

 

Severity Rating Recommendations
1 Maintain current NDT inspection interval
2 Increase NDT inspection interval
3 Perform follow-up NDE in critical locations (visual, AE, etc…)
4 Continuous monitoring using AE
5 Retire from service/replace
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