Wire Rope

Wire Rope Inspection

All wire rope eventually wears out making periodic inspections necessary throughout the service life of the rope. Wire rope is prone to damage and wear due to abrasion, fatigue, corrosion, and improper handling. Taratech personnel look for localized flaws or loss of metallic cross-sectional areas using a variety of inspection methods. The least complicated method is visual inspection. Taratech purely looks for broken strands, wear and corrosion on the surface of the cable. For a more comprehensive evaluation, Taratech uses a number of different methodologies and corresponding instruments that allow inspectors to assess the internal areas of wire rope cable.

One of the more widely used of these instruments employs magnetism to inspect the rope. The inspection instrument is placed around the wire rope and moved along the rope or the rope is pulled through the instrument. Strong permanent magnets or electromagnets are used to create a strong magnetic field within the rope. The rope is said to be magnetically saturated as it is carrying all the magnet flux it can. In areas where the rope is damaged, it cannot support as much of the magnet flux and some of it “leaks” out of the rope. Instrument sensors in the inspection head detect the magnetic flux leakage caused by the internal or external defects in the rope. Defects as small as 0.05 % of the rope’s cross-sectional area can often be detected.