Technical requirements for hooks

2025-08-12 05:47:35

  1. The purchase of hooks should be made with the manufacturer's certificate of conformity and other technical documents before they can be used; important departments purchase hooks such as railways, ports, etc., and the hooks need to be strictly inspected (flaw detection) when leaving the factory.

  2. The hook must not have defects that affect the safe use performance; the hook defects must not be welded and repaired; the surface of the hook should be smooth and there should be no defects such as cracks, folds, sharp angles, burrs, peeling, and overburning.

  3. Two appropriate positions can be selected at the short distance of the hook opening *** to print the signs that are not easy to wear, and the distance of the signs is measured as the basis for detecting whether the opening degree has changed during use.

  4. The hook material can be made of 20 high-quality carbon steel or hook special materials DG20Mn, DG34CrMo, etc., and cast hooks are strictly prohibited. The materials of plate hooks are generally made of A3 and C3 ordinary carbon steel, or 16Mn low alloy steel. 5. The technical conditions of homemade hooks should comply with the provisions of GB 10051.1-88~GB 10051.5-88 (New standard: GB10051.1-2010~GB 10051.5-2010)

  6. The longitudinal axis of the plate hook and hook sheet must be located in the rolling direction of the steel plate, and the hook sheet is not allowed to be spliced.

  7. The hook and hook piece is riveted with countershot rivets, and the high-stress bending parts in which the plate hook and the lifting point are not allowed to be connected with rivets.

  8. Fully closed welding is not allowed between the plate and hook stacks, only intermittent welding is allowed.

  9. Hooks that have undergone overload tests should be scrapped.

 

  1. The purchase of hooks should be made with the manufacturer's certificate of conformity and other technical documents before they can be used; important departments purchase hooks such as railways, ports, etc., and the hooks need to be strictly inspected (flaw detection) when leaving the factory.

  2. The hook must not have defects that affect the safe use performance; the hook defects must not be welded and repaired; the surface of the hook should be smooth and there should be no defects such as cracks, folds, sharp angles, burrs, peeling, and overburning.

  3. Two appropriate positions can be selected at the short distance of the hook opening *** to print the signs that are not easy to wear, and the distance of the signs is measured as the basis for detecting whether the opening degree has changed during use.

  4. The hook material can be made of 20 high-quality carbon steel or hook special materials DG20Mn, DG34CrMo, etc., and cast hooks are strictly prohibited. The materials of plate hooks are generally made of A3 and C3 ordinary carbon steel, or 16Mn low alloy steel. 5. The technical conditions of homemade hooks should comply with the provisions of GB 10051.1-88~GB 10051.5-88 (New standard: GB10051.1-2010~GB 10051.5-2010)

  6. The longitudinal axis of the plate hook and hook sheet must be located in the rolling direction of the steel plate, and the hook sheet is not allowed to be spliced.

  7. The hook and hook piece is riveted with countershot rivets, and the high-stress bending parts in which the plate hook and the lifting point are not allowed to be connected with rivets.

  8. Fully closed welding is not allowed between the plate and hook stacks, only intermittent welding is allowed.

  9. Hooks that have undergone overload tests should be scrapped.

 

  1. The purchase of hooks should be made with the manufacturer's certificate of conformity and other technical documents before they can be used; important departments purchase hooks such as railways, ports, etc., and the hooks need to be strictly inspected (flaw detection) when leaving the factory.

  2. The hook must not have defects that affect the safe use performance; the hook defects must not be welded and repaired; the surface of the hook should be smooth and there should be no defects such as cracks, folds, sharp angles, burrs, peeling, and overburning.

  3. Two appropriate positions can be selected at the short distance of the hook opening *** to print the signs that are not easy to wear, and the distance of the signs is measured as the basis for detecting whether the opening degree has changed during use.

  4. The hook material can be made of 20 high-quality carbon steel or hook special materials DG20Mn, DG34CrMo, etc., and cast hooks are strictly prohibited. The materials of plate hooks are generally made of A3 and C3 ordinary carbon steel, or 16Mn low alloy steel. 5. The technical conditions of homemade hooks should comply with the provisions of GB 10051.1-88~GB 10051.5-88 (New standard: GB10051.1-2010~GB 10051.5-2010)

  6. The longitudinal axis of the plate hook and hook sheet must be located in the rolling direction of the steel plate, and the hook sheet is not allowed to be spliced.

  7. The hook and hook piece is riveted with countershot rivets, and the high-stress bending parts in which the plate hook and the lifting point are not allowed to be connected with rivets.

  8. Fully closed welding is not allowed between the plate and hook stacks, only intermittent welding is allowed.

  9. Hooks that have undergone overload tests should be scrapped.

 

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