Lifting sling chains are commonly used as lifting tools to connect large objects to the hooks of cranes or other lifting machinery.
Choosing the right lifting sling chain
First, it is necessary to be clear about the size, characteristics, fastening methods, lifting environment, and what issues need to be avoided when lifting the object.
Second, check the product label of the lifting chains and slings to confirm the identification number, rated load, chain diameter, manufacturer, and other information.
Third, determine the lifting route and lifting method, close the operating area, and ensure that unrelated personnel cannot enter the operating area during the lifting process.
Note: do not use lifting sling chains with defects or missing markings!
Precautions for lifting sling chains during lifting
Keep the angle between any two single-leg lifting sling chains ≤ 90 degrees.
Protect the sharp edges of the object to prevent the object from being worn by the chain.
Use guide ropes to control the swing and rotation of the lifted object.
Use the double-bundle sling knot method to tie long, rectangular objects.
When using lifting clamps, only lift one object at a time.
Use suitable chain rigging accessories to shorten the chain.
Correct use of lifting sling chains
Before lifting the object, the lifting rigging must be selected correctly, including the number of lifting sling chains, the diameter of the chain, and the ultimate working load (WLL). If it is a multi-leg lifting sling chain, you need to understand the ultimate working load of the lifting sling chain at different angles.
When using the lifting sling chain, it is necessary to follow the laws, regulations, and relevant safety standards for lifting operations.
The chain is prohibited from twisting or knotting.
It is forbidden to drag the load from below.
When the chain wraps around the corners of the lifted object, a cushion must be added to prevent damage.
To prevent load impact or imbalance, an adjuster can be used if necessary.
When the hook is used, the load should act at the lowest point of the hook groove and should not be applied directly to the hook tip.
Lifting sling chains are prohibited from being used in acidic solutions and gas environments, which may cause chain corrosion or trigger brittle mechanisms and cracks.
Without the permission of the lifting sling chain manufacturer, no further processing, including galvanizing, electroplating, coating, heating, and acid washing, is allowed for the lifting chain.
When transporting important or dangerous items, professional personnel must conduct risk assessments and adjust the ultimate working load of the lifting sling chain accordingly.
Before the first use of lifting sling chains, it must be confirmed that the lifting sling chains meet the order requirements and are accompanied by a certificate of inspection. The markings on the lifting sling chains and the ultimate working load are consistent with the certificate. Before each use, the lifting sling chain must be checked for damage and wear. The weight of the lifted object in a static state must not exceed the ultimate working load of the lifting sling chain.
