1、吊钩应是正式专业厂按吊钩技术条件和安全规范要求生产制造的， 产品应具有生产厂的质量合格证书， 否则不允许使用。
2、新钩应做负荷试验 ， 测量钩口开度不应超过原开度的0.25%。
4、吊钩应每年进行一次试验。试验时以1.25 倍容许工作荷重进行10min 的静力试验， 用放大镜或其他方法检查， 不应有裂纹、裂口及残余变形。
5、三个危险断面应用煤油清洗 ， 用放大镜看有无裂纹。对板式钩应检查衬套、销子磨损情况。
1. The hook shall be manufactured by a formal professional manufacturer according to the hook technical conditions and safety specifications, and the product shall have the manufacturer's quality certificate, otherwise it is not allowed to use.
2. Load test shall be carried out for new hook, and the measured opening of hook mouth shall not exceed 0.25% of the original opening.
3. Frequently check the hook for cracks, serious deformation, corrosion and wear during use
4. The hook shall be tested once a year. During the test, the static test shall be carried out with 1.25 times of the allowable working load for 10min. The magnifier or other methods shall be used to check that there shall be no cracks, cracks and residual deformation.
5. The three dangerous sections shall be cleaned with kerosene and checked for cracks with a magnifying glass. For plate type hook, check the wear of bushing and pin.
6. The defects on the hook shall not be repaired.