what is Technical requirements for hooks
The utility model can be used to select the two suitable positions to print the marks which are not easy to wear at the shortest distance of the opening of the hook, and to measure the distance of the marks as the basis for detecting whether the opening degree is changed in use.
The purchase of the hook should be the manufacturer's certificate and other technical documents can be used; an important part of the procurement of hooks, such as: railways, ports and so on, the need for strict inspection of the hook factory
The technical conditions of the self made hook shall comply with the requirements of GB 10051.1-88 to GB 10051.5-88 (new standard: GB10051.1-2010 ~ GB 10051.5-2010)
The hook material can be made of 20 high quality carbon steel or hook material DG20Mn, DG34CrMo and so on. The material of plate hook is generally applied A3, C3 ordinary carbon steel, or 16Mn low alloy steel
The hook should not have defects which affect the performance of the safety hook; defect repair welding; hook surface should be smooth, no cracks, folding, acute, burr, stripping, burning and other defects.
