August 1, 2017
The Mine Safety and Health Administration (MSHA) issued a Safety Alert: Nondestructive Testing & Wire Rope Examinations after conducting wire rope nondestructive testing (NDT) and inspections on hoisting ropes that had been determined to be safe for service after a recent examination. MSHA found that the ropes had flaws and no longer met MSHA in-service standards. Therefore, MSHA is recommending that mine operators use NDT equipment, which uses magnetic or ultrasound waves to view the inner workings without cutting into the rope, when conducting required six month inspections of wire ropes. Loss of metallic area, flaws (broken wires and corrosion), and strength loss can be evaluated through NDT for the entire active length of a hoist rope.
MSHA offers the following best practices for mine operators to maintain wire ropes, including conducting nondestructive testing and examinations: