Chain scrap judgment
1. The allowable wear value of the sling chain shall not exceed 10% of the diameter of the ring chain bar or the thickness of the auxiliary equipment
2. Calculated from the plane where the main ring is not bent, if the main ring is twisted more than 10 degrees, it should be scrapped
3. It is forbidden to use if any part of the sling has cracks, bending or twisting, and there is jamming or stiff blocking between the ring hinges and cannot be ruled out.
4. The permanent elongation of both the chain and the single ring shall not exceed 5% of the original length.
