2. The new hook should be subjected to a load test, and the opening of the measuring hook should not exceed 0.25% of the original opening.
3.During use, check whether the hook is cracked or severely deformed, corroded and worn.
4. The hook should be tested once a year. During the test, carry out a static test of 1.25 times the allowable working load for 10 minutes, and check with a magnifying glass or other methods. There should be no cracks, cracks and residual deformation.
5. The three dangerous sections should be cleaned with kerosene. Use a magnifying glass to see if there are cracks. For plate hooks, check the bushings and pins for wear.
6. Defects on the hook shall not be repaired.
