2016-11-01

When there are the following defects, the Lifting Hooks for Cranes should be scrapped and replaced: (1). Hook surface with crack or break; (2). Dangerous section erosion rate more than 10% of the original size; (3). Dangerous section and hook neck part with plastic deformation; (4). Casting gap increase of 15% compared to the original size; (5). Tip of the hook torsional deformation of more than 10%; (6). Board hook bushing wearing capacity reaches 30% of the thickness dimension, the bushing should be scrapped. (7). Board hook spindle wearing capacity reaches 5% of the original size, mandrel should be scrapped.........