Crane slings: Chain sling, Wire rope sling, Synthetic Sling

Crane slings are important for material handling, which influences the crane machine safety and efficiency. How to select the right sling for your lifting crane? How to ensure the safety of your crane sling? How to store your crane slings after used? These and other frequently asked questions on crane slings will be discussed in the following for your reference. MYVHenan Weihua Machinery Co., Ltd
Types of Crane Slings MYVHenan Weihua Machinery Co., Ltd
Crane slings are generally can be divided in the following types: Chain sling, wire rope sling, nylon slings, synthetic web, cargo nets, synthetic web, etc. Each type of crane sling has its own merits and shortcomings. In the following, the most frequently used crane slings will be put in length.MYVHenan Weihua Machinery Co., Ltd

 Chain sling

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Chain sling MYVHenan Weihua Machinery Co., Ltd

• Chain sling is the most commonly used crane sling for the advantages on high strength and durability.
• Chain sling can be used according to their “grade”, which categorizes them by the order of tensile strength.

Notice to chain sling MYVHenan Weihua Machinery Co., Ltd
The chain slings are banned to use when the chain slings are found with defective welds, questionable welds, bending chain links or elongation chain links, cracked or deformed master and coupling links, etc. When the identification tags of the chain slings are miss, it is also forbidden to put into use. Any deformation, cracking or wearing is found, the chain slings are not ready to use. And any other unsafe condition is observed, it is banned to use.MYVHenan Weihua Machinery Co., Ltd

Wire rope sling

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Wire rope sling MYVHenan Weihua Machinery Co., Ltd

 MYVHenan Weihua Machinery Co., Ltd

• Wire rope slings are basically a group of wires, twisted and wrapped around a core.
• The wire rope slings are extensively used for lifting loads.

Notice to wire rope slings MYVHenan Weihua Machinery Co., Ltd

Wire rope slings are not allowed to use when find five broken wires in on strand in on lay, kinking, crushing, bird caging, heat damage, attachment cracking, deforming or wearing, etc.MYVHenan Weihua Machinery Co., Ltd

Synthetic sling

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Synthetic slingMYVHenan Weihua Machinery Co., Ltd

•  Synthetic slings is good in strength, flexibility and elasticity, light in weight and easy to handle.
• Synthetic slings are used to handle slippery loads for its ability to provide good friction which can keep the loads from damages.
• Synthetic slings must be used in the proper working environment, to make the safety of the sling, for they are usually made from polypropylene, polyester, polyamide, nylon or any combination of these.
• Synthetic slings should be inspected accordingly for they are easy to be damaged and deterioration.

Notice to synthetic slingsMYVHenan Weihua Machinery Co., Ltd

The synthetic slings are not qualified to use when the synthetic sling are found acid or caustic burns, age deterioration, melting or charring on the surface, colored thread exposure due to snags, tears, or cuts, etc. And also the synthetic slings are also forbidden to use when the identification tags are unreadable or missing, etc.MYVHenan Weihua Machinery Co., Ltd

Crane slings selections

• When select the crane slings, the following factors should be considered, the single specification, the size of the objects or loads, weight, shape, and the way of the hoisting, etc.
• The lifting capacity must be adequate and work well with the proper length of the used sling.
• When more than one slings are used at same time, the slings must belong the same category.
• The crane sling application environment must be considered for it make affects the safety of the slings.

Factors affects the sling safety

The safety of the crane slings are affected by the following factors:MYVHenan Weihua Machinery Co., Ltd

• 1) Size, Weight, and Center of Gravity of the Load.

By the center of the gravity of the load, it means the crane hook must be directly over the center of gravity point. If NOT, it may result in to dangerous tilting and uneven stress to the sling leg.MYVHenan Weihua Machinery Co., Ltd

• 2) Rated Capacity of the Sling.

The capacity of the crane sling varies with the sling types, sizes, and hitch types, etc. Notice the older crane slings must be used with caution.MYVHenan Weihua Machinery Co., Ltd

• 3) History of Care and Usage.

The sling-related accidents are mainly resulted from the mishandling and misuse of the slings. Proper care of the crane slings is important for maximum service and safety. The crane slings must be protected with wood blocking, burlap padding and cover saddles to prevent sharp bends and cutting edges.MYVHenan Weihua Machinery Co., Ltd

MYVHenan Weihua Machinery Co., Ltd

MYVHenan Weihua Machinery Co., Ltd
Crane slings working rules

For the use of crane slings, the following rules should be followed:MYVHenan Weihua Machinery Co., Ltd

•  Crane slings overhead loading is totally prohibited.
• The broken crane slings is not allowed to be used.
•  Do not pull a sling from a suspended load under tension.
• Crane slings with knots should not be used.
• Do keep the lifting loads away from working staffs.
• Do keep the lifting loads away from the obstructions.
•  Do keep the crane sling from the edges of the loads.

Sling angles and load capacity

Single angles affects the crane sling load capacity. Generally, the greater the crane sling angle is, the greater the stress of the sling is.MYVHenan Weihua Machinery Co., Ltd

MYVHenan Weihua Machinery Co., Ltd

The type of the crane sling is also affects the load capacity of the sling. Multiple crane sling usage largely affects the load capacity. The capacity of the crane sling can be calculated by the following formula:MYVHenan Weihua Machinery Co., Ltd

MYVHenan Weihua Machinery Co., Ltd
MYVHenan Weihua Machinery Co., Ltd
Consult the crane sling manufacturer for more information and proper usage.MYVHenan Weihua Machinery Co., Ltd

Sling storage

After using, the crane sling should be cleaned, checked for damage. If damage is found, it should be reported the related staff. And following the crane sling storage rules to get them stored properly:MYVHenan Weihua Machinery Co., Ltd

• Crane slings should be stored in a dry environment out of the direct sunlight.
• Crane slings should be kept off the floor or ground to prevent corrosion.
• Crane slings should be hung from hooks to prevent tangling and easy access.
• Crane slings should be kept away from electrical sources.
• Crane slings should be stored according to the types. (The steel chain slings should not be mixed with the synthetic slings.)
• Crane slings should be kept in the designated area.

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