Chain slings play a crucial role in various hoisting and heavy cargo transportation operations. However, as tools that withstand tremendous tension, the safety of chain slings is of utmost importance. During use, if a chain sling exceeds the specified elongation, it requires our immediate attention. Particularly, when a chain sling shows more than 3% elongation at any position, it should be immediately discarded to ensure operational safety.

Why should a chain be discarded after more than 3% of stretch? Firstly, chains that exceed this stretch limit may have experienced significant changes in their physical properties. Their strength and stability may have been greatly reduced, and continued use could pose serious safety risks. Additionally, excessively stretched chains are more prone to fatigue damage, thereby shortening their service life.

In practice, regular inspections and maintenance of chain rigging are essential. Should any significant stretching be detected in the chain rigging, operators should immediately cease use and conduct a professional inspection. If the stretching exceeds 3%, the chain rigging should be immediately retired and replaced with new equipment.

Neglecting the stretching issue of chain rigging can lead to severe consequences. In lifting operations, once the chain breaks, it not only may result in property loss but also poses a threat to the safety of the operators. Therefore, strictly adhering to the scrapping standards and promptly replacing over-stretched chain rigging is a crucial measure for ensuring operational safety.

Moreover, we should also be aware of other potential safety hazards associated with chain rigging, such as wear on the chain links and weld cracks. These issues can also impact the performance and safety of the chain rigging. Therefore, when using chain rigging, we must remain vigilant and conduct regular inspections and maintenance.

In summary, chains and rigging should be promptly discarded and replaced with new equipment if they exhibit more than 3% of stretch at any position. This is a crucial measure to ensure the safety of lifting and heavy cargo transportation operations. Additionally, we should enhance the daily inspection and maintenance of chains and rigging to promptly identify and address various safety hazards, thus safeguarding the lives of workers and the property of the enterprise.