Crane hook supervision and inspection

Crane Hook is a very important type of lifting devices, which has played an important role in types of cranes and hoists and the quality of the lifting hook is directly related to the safety of personal and property. To prevent the occurring of the hook fracture failure accidents, the supervision over the quality of the hook and the hook inspection should be strengthened.

Supervision of new hooks entering the factory

• Review the material certificate of the hook, heat treatment report and other quality assurance documents, and require the manufacturing factory to carry out production in strict accordance with GB 10051-1988, and the raw materials of the crane hook should be among the 5 materials specified in the standard.
• Check the surface of the hook to ensure it is smooth and clean, without cracks, sharp angles, burrs, peeling and other defects;
• There should be no cracks, white spots or inclusions in the hook.
• Measure the original shape and weight of the hook and save it for the next check.

Inspections in use of hooks

• Non-destructive testing shall be carried out on the parts where the stress is concentrated. When the cracks are detected, the crane hook should be stopped in use immediately and replaced by a new lifting hook.
• The abrasion or corrosion of the dangerous section of the hook should be inspected regularly. When the actual size of the lifting hook is less than 95% of the original one, the crane hook should be replaced.
• When the deformation of the hook opening reaches 15% of the original size, the crane hook should be replaced.
•  Welding is not allowed for the lifting hook.
• Dangerous section or hook handle must not have plastic deformation.

Lifting hook is a wearing part and the frequently used accessory in machinery factory, which may cause serious person and equipment accident extremely easily, once fracture and fall accident occurred. Thus, pay more attention on crane hook safety, quality supervision and regular inspection.

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