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Sep 29,2023

How to Properly Select Industrial Crane Slings

While relocating a hanging weight, it is vital that industrial personnel use the appropriate slings. With the goal of ensuring the secure lifting and moving of heavy equipment, manufacturers of wire rope regularly release cutting-edge new sling designs.

In general, the following criteria should be considered while choosing a industrial crane slings:

• The size and weight of the load

• The sensitivity and temperature of the material being moved

• The configuration and the shape of the load

• Environmental circumstances

• The results of the visual examination (This is to be done before each use to ensure security and effectiveness.

Slings are also often employed for lifting machinery. Incorrect usage of hoisting equipment (including slings) may cause either a speed increase or decrease, in addition to overloading.


Types of Slings:

Six different kinds of slings exist:

• Natural fiber rope

• Synthetic fiber rope

• Metal mesh

• Chain sling

• Synthetic web

• Wire rope

These slings are divided into three more categories:

• Chain

• Wire rope and mesh

• Synthetic web /Fiber rope


Factors to Consider When Selecting Industrial Crane Slings

The following guidelines may be helpful in choosing the proper kind of sling:

Chains Sling

The proper chain will typically be thick, solid, and uncut. Check for any stretches, scratches, cavities, or wear beyond the manufacturer's specifications before using. If any of these problems are present, the slings should be considered unsafe and removed from service immediately. Chains made of alloy steel are widely employed in large lifting machinery due to their high strength and flexibility. Nevertheless, because of its lack of resistance to rapid shocks, improper usage of chain slings may result in the sling breaking, the cargo being damaged, and the workers being injured.

Wire Rope Sling

Wire ropes are made by compiling several separate wires and twisting them into strands. Wire rope is created when these strands are further twisted together. Wire ropes constructed from fiber strands are more flexible but also more easily damaged by the elements. Yet, wire ropes constructed from wire strands have a reputation for being more robust and resistant to fire.

When shopping for a durable wire rope, it's important to consider four key qualities: strength, wear resistance (bending without distortion), abrasion resistance, and Withstanding Abuse.

• Strength

Size (diameter), grade, and construction all play a role in a rope's ultimate breaking strength. The major reason for this is to make sure the wire rope can handle the utmost weight that may be put on it.

• Wear Resistance

The wire rope's capacity to resist fatigue is an important quality to look for. Fatigue failure occurs when tiny fractures form in the rope as a result of repeated bending at a tight radius. Blocking or cushioning the wire rope to extend the bend radius is the most popular way to avoid the emergence of such fractures.

• Endurance to Abrasions

This characteristic is established by the dimensions and quantity of individual wires used in the rope's construction. It has been noted that thinner wires are more malleable since they bend more readily. Yet, they provide little protection against wear and tear. Larger wires, on the other hand, are less pliable but more resistant to abrasions.

• Withstanding Abuse

This is a typical reason for a rope to break. Wire rope slings are easily damaged by improper use or handling, which may lead to kinks and bird caging and, in turn, possible personal injury to anyone working with the slings. Strict adherence to the safety protocols associated with the correct usage of the sling may help avoid such incidents and extend the life of the sling.

Fiber Rope and Synthetic Web Sling

• Fiber Rope Slings

Construction and painting are two examples of short-term uses for fiber rope and synthetic web slings. Most people trust them with pricey and fragile cargo like expensive medical equipment. Nevertheless, fiber rope slings quickly deteriorate when exposed to caustics and acids. Because of this, these ropes must be kept in an environment free of chemicals and solvents. Slings should also be checked for damage such as cuts, gouges, worn surfaces, brittle or discolored fiber, melting, or charring. The sling must be thrown away promptly if any such flaws are found.

Extreme internal wear might be indicated by the accumulation of powdery sawdust on the interior of the fiber rope. The sling has likely been chemically damaged if even lightly brushing the rope strands with a fingernail causes them to break readily. It would be best if you didn’t use ropes like that at all.

• Synthetic Web Slings

Nylon, polyester, and polypropylene are the materials used to create these slings. They conform to the shape of the load and keep it securely in place. They have a 300,000-pound weight capacity (depending on their size). They are also shock-absorbing and won't leave scratches on shiny surfaces. Since they are not affected by mildew, rot, or germs, can withstand chemical action, and have great abrasion resistance, they offer cheap upfront expenses and a long lifespan.  Synthetic web slings should be inspected for damage such as burns, melting, charring, snags, rips, cuts, broken stitches, deformed fittings, excessive wear, and elongation before each use in accordance with the manufacturer's guidelines.


The safety of a sling and the people using it depends on how well it is used and cared for. The aforementioned advice should be useful in getting you acquainted with its crucial features.

With years of experience and a focus on quality, SHANDONG SLING & STRAP has risen to the top of China's lifting sling, ratchet tie-down strap, and tow strap production industries. We provide a wide variety of webbing, including those used in ratchet straps, tie-down straps, tow straps, bolt straps, cargo nets, and round slings. Whether it's the IS09001 quality management system requirements of SGS, the stringent CE and GS quality standards of TUV, or the specific needs of our individual customers, all of our goods meet or exceed all expectations. 


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Benefits of Using Synthetic Lifting Slings

Synthetic lifting slings are one of the most frequently used equipments on any work site. They can support heavy loads, and their soft material offers better load protection than wire rope made of coarse cloth. Synthetic slings are mostly made from lightweight, durable, and flexible materials such as polyester or nylon. They are widely used in heavy industries such as construction and shipping as they are affordable, durable, and available in various sizes. Types of Synthetic Lifting Slings Synthetic Web slings Web slings consist of flat belt straps with fittings and holes. Web slings are the most commonly used sling. In contrast to chain slings, they have better flexibility and are lighter. They can also be manufactured with a wide breadth to increase surface area to handle heavyweight objects. They are available in two types of material nylon and polyester. During a lift, a user will observe 8-10% stretch for nylon and 3% for polyester. Synthetic Round slings Round slings are designed with load-bearing fibers or core yarns shielded by a woven outer jacket. These slings possess remarkable strength while being soft and pliant, and they safeguard against scratches, dents, and crushing of smooth or polished surfaces. The purpose of a woven outer jacket is to protect the inner core yarns from UV radiation, dust particles, and grease. They can stretch 3-5% during a lift at the weight-load limit. For heavyweight use suitable for automotive, and other heavy industries, there is a particular type of round slings capable of withstanding load lifting limit of up to 500,000lbs. Synthetic Rope Slings While synthetic rope slings have been utilized for more than six decades, the development of high-performance fibers has shifted how they are viewed for overhead lifting tasks. These advanced fibers are renowned for their lightweight build, exceptional strength, flexibility, and adaptability. As a result, they are gaining wider acceptance and are now the preferred choice for specific lifting applications in the offshore and deepwater, shipyard, and construction industries. Many types of synthetic rope material are available in the market, so it's essential to know the particular fiber that a rope is made from to help understand how it would behave during the lifting. Advantages of Synthetic Slings From lifting to rigging, synthetic slings are useful for various industrial applications. Read on further to learn more about what makes these lifting slings so tough and adaptable. Highly Flexible The flexible fibers of these synthetic slings are excellent for quickly gripping irregularly shaped loads. This quality also makes them perfect for lifting fragile or soft objects without scratching or piercing them. Lightweight One of the benefits of lifting slings is that they are made of lightweight material like synthetic polyester, making it easy to transport many lifting slings from one work site to the next. This must be done with something other than chain slings as they are heavy to move around. Customizable According to Applications The uses of lifting slings can vary from industry to industry. The strength and breadth/length of synthetic slings can be customized precisely during manufacture to suit any industry application's needs. Various fittings can be attached to both ends for hitching or hooking a load. Resistant to Abrasion and Cuts Regarding durability, lifting slings are resistant to scratches as they are made from tough synthetic fibers with an added abrasion-proof layer. This quality also makes the sling cut-resistant when the sling drags over a sharp corner while lifting an object. But synthetic fibers are still not as tough on edges as chains or wire ropes, so proper edge protection must be used when handling loads. Chemical Resistant According to fiber quality standards, synthetic slings have variable degrees of resistance against chemicals. For example, nylon slings resist alkaline burning, while polyester slings have resistance against acidic burns. Nylon slings are also unaffected by grease and oil. Adaptable to Industry Applications From mining and construction to shipping, synthetic slings can be manufactured according to specifications to fit the needs of various industry applications. Another advantage is that they can be used in a wide variety of hitches, such as choker hitch, basket hitch, or vertical hitch, to grip diverse objects, making lifting slings exceptionally versatile. Long-lasting A fantastic quality of synthetic fibers is that they do not rot like natural fibers. Moreover, they are rust proof which makes synthetic slings better than chains. Synthetic fibers can tolerate a wide variety of temperatures and weather conditions which natural fibers cannot, making lifting slings long-lasting and rigid. But you should remember that they have low heat resistance compared to chains, so they cannot tolerate extreme heat environments. Neutral and Non-Conductive Lifting slings are not nonconductors of electricity and are non-flammable. This property makes them safe to use in explosive environments. Inexpensive and replaceable Synthetic slings are cheaper to produce as compared to chain slings. Furthermore, synthetic round slings can be repaired if they suffer damage to the outer jacket. This cannot be done with chains; once broken, there is the additional cost of replacing them. So, synthetic slings are the way to go if you want to save on your money. Easy to Deploy When compared to chains, synthetic slings are much more convenient to use. You have to unroll and do a safety inspection which consists of checking for signs of chemical burns and knots in the sling and observing the sling for cuts and abrasions. Once this is confirmed, the sling is ready for use in the field. Final Words In conclusion, synthetic lifting slings are the perfect equipment for lifting loads in heavy industries. Whether you are hoisting, towing synthetic slings and synthetic ropes play a significant role in making the tasks efficient and time-saving.  

How To Inspect Synthetic Web Slings? – Use These Methods

Large-scale material movement can not afford any kind of loss caused by accidents. These accidents occur because of failure of equipment or human error. If we talk about the heavy movement of goods, webbing slings are used to lift them. Instead of metal chains, these nylon and polyester straps are used, which are cost-effective. Furthermore, they are available in different sizes.  What needs to be discussed here is the synthetic web sling inspection routine. How often should you inspect these webbing slings at your workplace to avoid accidents? It is a responsibility of a field supervisor to ensure the inspection of all the webbing slings before starting operations. On a monthly or semi-annually basis, inspection is mandatory. There are many reasons why a webbing sling needs to be inspected because one negligence can cause lots of damage. What you need to do is see some signs of damage, which we have mentioned below.  Marks of Tearing, Pilling, and Worn-Out Stitches   Tons of weight are lifted by webbing slings, and they are one of the secure ways of handling massive objects. However, wear and tear are inevitable, and need to be inspected after some months or weeks. If you detect any torn threads, that means your webbing sling needs to be tested. Light or mild is also a serious concern because it may break during the operation. Tensile pressure and the rough surface can make webbing slings lose their strength after some time. It is usual, and you must inspect before the sling finally breaks down. You can find these apparent signs on the surface of slings or have them inspected by an expert. Unreadable or Illegible Safety Label If a webbing sling’s label is damaged or unreadable, you need to remove it. There is a reason why a label is installed in it. Safety labels must be inspected before using web slings. All the details are mentioned on it about material type, weight-bearing limit, angle of the sling, length, code, inspection standard, and company’s name. This information is important before using a sling to avoid mistakes. If you select a sling with low strength, it may break down slowly or even suddenly. Moreover, there are warning signs mentioned on the label, which show the usage method and angular movement. Operators in supply chain and logistics industries have to be cautious of this warning label.  Any Damage Caused by Chemical, Heat, and UV Rays Chemicals are dangerous for almost every type of material. In the case of web slings, you need to look for damage caused by chemicals like acid and caustic. Acid can melt many types of materials, especially nylon. If you have a nylon sling, you need to look for any damage caused by acidic material. If you use a polyester sling, you need to find any marks caused by caustic material. Both types of chemicals can damage the webbing sling, which can break at any time if pressure is applied to it.  Since they are made of polyester and nylon, they must be protected from heat. Too much heat can melt the sling where it gets most contact with fire or hot objects. Even sunlight can damage and break the threads of web slings. UV rays can penetrate the plastic and it can reduce its life. In Addition, high temperatures can damage webbing slings too quickly because their polyester strands can shrink because of heat. If you find any burn marks on the slings, time to replace them.  Look For Any Cuts, Abrasions, Holes, or Knots Using slings on objects with sharp edges can cause abrasions and cuts on them. You need to inspect your slings more frequently. If you find any marks of damage, it is time to change the slings. Moreover, if you inspect holes in slings, it is a sign that they may break down soon. Cuts, holes, abrasions, and every torn spot of a sling are identified as risk factors. Some people ignore knots, which are also a sign of a problematic sling. A knot can reduce the breaking strength of the sling, which is a risk of an accident. Measure the Length to Meet the Minimum Criteria  Slings have specific lengths, which need to be ensured before using them. Synthetic web sling inspection of length is necessary because a short sling for a long purpose can cause problems. Also, it will have an impact on the tensile strength of a sling. Inspect the sling if it has been cut or shortened because of any reason. If you find two different slings tied together, remove that sling immediately. This kind of sling can break at any moment.  Conduct Professional Standard Tests  There are many standards in the industry, which are followed for the testing of webbing slings. You need to have your webbing slings tested if you have doubts about them. A number of verified and well-known standards are followed for them. They are ASME B30.9, EN 1492-1, EN 1492-2, OSHA 1910.184, and ANSI/ASME B30.10.  This synthetic web sling inspection is important for the safety of workers and materials during the movement of goods on-site. Construction, supply chain, shipping, logistics, and similar industries follow these standards for the testing of webbing slings. If any webbing sling fails to succeed, it is discarded. Safety Tips for Web Slings Usage To avoid any accident, one needs to do a synthetic web sling inspection. These precautions can help you if you use webbing slings at your workplace.  1. Cover the web slings with protective layers. 2. Avoid pulling slings on rough or abrasive surfaces. 3. Prevent contact between web slings and sharp objects. 4. Do not use a webbing sling if it is already showing signs of damage. 5. Cut off the eyes of damaged slings to prevent reusability. 6. If a sling is in poor condition, discard it by cutting it into small pieces. 7. Do not weld the broken hooks, change them instead. 8. Do not leave web slings in direct sunlight or extremely hot temperatures. 9. Avoid using nylon slings for acidic materials and polyester slings for caustic materials. Using the right type of webbing sling for the right purpose will increase the success rate, and it will also get better performance of webbing slings in operations. To maintain the safety of material and workers, inspect every sling on a regular basis.  

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