Product end-of-life standards
1 The forged surface of the rigging accessory hook has cracks and should be scrapped.
2 When the hook of the rigging accessory is twisted and deformed, and the hook body is twisted more than 10 °, it should be scrapped.
3 When the opening deformation of the rigging accessories reaches 10% of the original size, it shall be scrapped; when the opening deformation of other hooks reaches 15% of the original size, it shall be scrapped.
4 When the actual size of the dangerous section of the hook of the rigging accessories is less than 90% of the original size, it should be scrapped. Hook nuts or safety parts are not allowed to wear.
5 The size of the hook of the rigging accessory after corrosion shall not be less than 90% of the original size, otherwise it shall be scrapped.
6 The hook thread of the rigging accessories should try to avoid the occurrence of corrosion, otherwise it should be trimmed and processed to eliminate corrosion defects. When the axial clearance exceeds the allowable value, a new nut must be replaced.
7 The welding repair of rigging accessories hooks and the fact that their hooks are subjected to high temperature, strong corrosion and exceeding the prescribed time limit shall be scrapped.