Maintain Wire Ropes: 9 Expert Tips for Maximum Safety and Longevity (2024)

Properly maintaining wire ropes is essential for ensuring operational safety, efficiency, and durability across industries such as marine, construction, mining, and lifting operations. This comprehensive guide will help you maintain wire ropes effectively, extending their service life and performance.

Why Maintain Wire Ropes?

Effective wire rope maintenance:

• Prevents accidents and unexpected failures.
• Meets regulatory compliance (OSHA).
• Reduces operational downtime and costs.
• Enhances performance and safety.

9 Expert Tips to Maintain Wire Ropes

1. Regular Visual Inspections Inspect regularly for signs of wear, corrosion, broken strands, kinks, and distortion. Address issues immediately to avoid accidents.
2. Apply Proper Lubrication Regularly lubricate ropes using specialized wire rope lubricants to minimize friction, corrosion, and internal wear.
3. Keep Wire Ropes Clean Clean ropes regularly to remove contaminants such as dirt, dust, and corrosive substances.
4. Correct Storage Practices Store ropes in dry, clean environments. Properly coil ropes to avoid twists, kinks, and damage.
5. Monitor Rope Tension Always adhere strictly to specified working load limits. Avoid sudden or excessive loads to prevent damage.
6. Use Correct Handling Techniques Proper handling prevents accidental damage or deformation. Train your team in handling wire ropes safely and efficiently.
7. Scheduled Professional Inspections Arrange periodic inspections by qualified professionals to detect hidden or internal damage.
8. Replace Damaged Wire Ropes Immediately Prompt replacement of damaged ropes is critical for safety and avoiding costly downtime.
9. Educate and Train Personnel Provide regular training for operators on identifying damage, proper use, and maintenance procedures.

Common Mistakes When Maintaining Wire Ropes

• Neglecting minor signs of wear or damage.
• Using improper lubricants not suitable for wire ropes.
• Incorrect storage or handling practices causing damage.

Applications That Benefit from Maintaining Wire Ropes

• Cranes and Hoists: Essential in heavy lifting.
• Marine Operations: Requires corrosion-resistant wire ropes.
• Mining Industry: Dependable performance in harsh environments.
• Elevators and Winches: Critical for operational safety.

Importance of Wire Rope Inspection

Wire rope inspection is crucial for identifying issues early, helping to maintain optimal performance and safety. Regular inspections should be performed by trained professionals to detect potential problems before they lead to failures.

Guidelines for Wire Rope Replacement

Adhering to clear wire rope replacement guidelines ensures safety and operational efficiency. Ropes must be replaced when there are visible signs of significant wear, broken wires, corrosion, or deformation.

External Resources for Wire Rope Maintenance

• OSHA Wire Rope Regulations
• Wire Rope Technical Board (WRTB)

Internal Resources

• Understanding Wire Rope Size Charts
• Proper Handling of Wire Ropes

Conclusion

Adhering to these 9 expert tips will ensure you effectively maintain wire ropes, optimizing safety, reducing operational costs, and ensuring regulatory compliance. Always consult experts and follow industry standards for best practices.

Contact our specialists or explore our internal resources for detailed advice on maintaining your wire ropes properly.

The post Maintain Wire Ropes: 9 Expert Tips for Maximum Safety and Longevity first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

Wire Rope Size Chart: 10 Essential Tips for Choosing the Right Size (2024 Guide)

Choosing the right wire rope size is crucial for safety and efficiency in industries such as construction, marine, mining, and lifting operations. This complete guide provides an easy-to-understand wire rope size chart along with essential tips to make accurate selections.

What is a Wire Rope Size Chart?

A wire rope size chart helps you determine the ideal rope size based on diameter, breaking strength, working load limits, and weight per foot or meter. Using this chart ensures that you select the most appropriate wire rope for your specific application.

Wire Rope Size Chart (2024 Updated)

10 Tips for Selecting the Right Wire Rope Size

1. Define Your Application clearly (lifting, marine, structural).
2. Know the Load your wire rope must handle.
3. Check Breaking Strength requirements.
4. Factor in Safety Margins (commonly a ratio of 5:1).
5. Consult a Reliable Wire Rope Size Chart (as provided above).
6. Consider the Environment (moisture, chemicals, weather).
7. Think About Rope Flexibility and Stiffness based on your equipment.
8. Evaluate Corrosion Resistance Needs (stainless steel recommended for marine applications).
9. Check Compatibility with Fittings and Connectors.
10. Verify Regulatory Standards like OSHA compliance.

Common Wire Rope Applications

• Cranes and Hoists – Essential in lifting operations.
• Marine Rigging – Resists corrosion in harsh environments.
• Mining Equipment – Robust and reliable for heavy-duty tasks.
• Elevators and Winches – Safety-critical applications.

How to Maintain Your Wire Rope

Regular maintenance helps ensure safety and extends rope life:

• Conduct visual inspections frequently.
• Lubricate regularly to reduce friction and wear.
• Replace wire ropes immediately upon signs of damage or excessive wear.

External Resources

• Wire Rope Technical Board (WRTB)
• OSHA Wire Rope Regulations

Internal Resources

• How to Maintain Wire Ropes Properly
• Understanding Working Load Limits Clearly

Conclusion

Utilizing an accurate wire rope size chart and following these essential tips ensures you make safe, cost-effective, and efficient choices. Always consult industry standards and experts when selecting wire ropes for specific applications.

For expert guidance, feel free to contact our specialists or explore more of our internal resources to optimize your operational efficiency.

The post Wire Rope Size Chart: Your Complete Guide for Accurate Selection (2024) first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

how many types of slings are there?

The Lifting slings is an essential part of the overhead lifting process. When you have a heavy pallet of bricks or a bundle of steel frames that need lifting, you can’t just attach the load to a hook on the crane and begin the lift. Most heavy materials are not specifically designed to be lifted by a crane, so it is the sling’s job to secure the load and provide an easy attachment point for the lifting mechanism.

As there are many different objects that need lifting, there are also many different types of slings to suit these objects. Though there are dozens of unique slings on the market, they generally fall into three main categories: synthetic, chain, and wire rope.

1. Web sling

For most general lifting applications (for instance, warehouse facilities), web slings are more than adequate thanks to its lightweight and flexibility. Web slings are also easy to use and can be fitted under any load.

Primarily, you will find web slings made of two materials – nylon and polyester. While nylon has better shock absorption, polyester provides better load control. Nylon slings are mostly used in applications with oil, alkaline, and grease, but are not suitable for acids and bleaches. Polyester slings can be used with common acids and bleaches, but not with concentrated acids.

Advantages of web sling: Lightweight, economical, flexible, easy to use, water and rustproof.

Disadvantages of web sling: Unsuitable for heavy loads and high temperatures, breakdown due to exposure to UV radiation, short product life.

2. Wire rope sling

As the name suggests, wire rope slings are made of steel wire strands braided into a rope. As compared to other slings, wire rope slings have the least cost for each ton of load. Along with resistance to abrasion and high temperatures, nearly 400-degree Fahrenheit, these slings are better suited for heavier loads and rugged facilities like construction sites.

However, because of their heavier weight, they are harder to use than web slings and can cause minor injuries. Wire rope slings are also prone to damage from kinking, abrasion, and crushing. As a result, they need to be inspected regularly for any damages.

Advantages of web sling: Medium weight, economic, high temperatures, abrasion, and UV resistant.

Disadvantages of web sling: Inflexible, can cause minor injuries, prone to damage.

3. Chain sling

Among the three types of slings, chain slings are the most suited for industrial applications and heavy load lifting. As a result, chain slings are extensively used in steel production plants and environments operating at high temperatures (up to 400-degree Fahrenheit). Chain slings are designed for continuous use, all thanks to their durable strength and long life. They are also more suited to be used in facilities with harsh conditions like foundries and heavy machine factories.

Advantages of web sling: Strength, durability, heavy loads, long life.

Disadvantages of web sling: Heavy, higher purchase cost, difficult to handle.

How to select Lifting Slings?

China’s hoisting and rigging industry is developing rapidly, but the technical standards are very imperfect. Due to the random production of hoisting rings by domestic enterprises and even arbitrarily reducing the safety factor, there are great hidden dangers in China’s hoisting safety. Although the relevant standards are gradually improved, we can not deny the existing problems in the safety of Lifting Slings.

All personnel working in the lifting industry should know the lifting slings, which mainly include metal lifting slings and synthetic fiber lifting slings. Metal slings and riggings mainly include wire rope slings and riggings, chain slings and riggings, hoisting webbing slings and riggings, etc; Synthetic fiber slings mainly include rope and webbing slings, and ropes are divided into nylon, polypropylene, polyester and high strength and high modulus polyethylene fibers.

So how do you understand the lifting, rope and sling in the lifting sling? Therefore, means crane represents hoisting, the cable represents connection, and the tool represents tool, i.e; Hoisting is a tool connected together. Let’s introduce how to choose the right sling.

First: choose rigging from concept

Steel wire rope rigging is processed with steel wire rope as raw material. It mainly includes phosphatized coated steel wire rope, galvanized steel wire rope and smooth steel wire rope. It is used for hoisting, traction, tensioning and bearing. It has the characteristics of high strength, light weight, stable operation and not easy to break suddenly. It is widely used in iron and steel, chemical industry, transportation, port and other industries.

The chain rigging is made of metal chain links. According to its formation, it mainly includes welding and assembly. According to its structure, it adopts high-quality alloy steel. Its outstanding characteristics are wear resistance, high temperature resistance, low ductility and no elongation after stress. It has long service life and is easy to bend. It is suitable for large-scale and frequently used occasions. Flexible multi limb and various combination forms can improve work efficiency and reduce cost.

The complete set of sling consists of main lifting ring, link shackle, lifting belt and metal end components. The main lifting ring includes long lifting ring, round lifting ring, combined lifting ring, etc. The connecting shackle includes bow shackle, chain shackle, etc. the lifting belt includes flat belt and circular belt, and the metal end includes various hooks and other metal parts. The complete set of sling can be optimized and combined freely according to the needs of customers.

Second: select the sling from the use precautions

Attention for hoisting of wire rope rigging: if it is a single leg hoisting belt, the hoisting point must be vertically above the center of gravity of the lifted object.

In case of double leg lifting, the lifting point shall be located on both sides of the goods, and the hook shall be above the center of gravity of the lifted object.

In case of three leg or four leg lifting, the lifting point must be evenly located on the plane around the goods, and the hook must be directly above the center of gravity of the object to be lifted. Note for lifting with sling: please pay attention to the relationship between the included angle and the bearing tonnage during use. If the sling used in the complete set of sling is damaged, it can not be used to avoid impacting or vibrating the load.

The safety factor is 4:1, specifically 5:1 or 6:1, which shall be used within the safety factor range.

Attention to hoisting of chain Lifting Slings: the chain shall not be knotted or twisted during use, and the hook tip shall not be used for load. The normal working temperature of chain Lifting Slings is – 40 ° to + 200 ° C. for single leg Lifting Slings, the hoisting point shall be vertically above the center of gravity of the lifting object; 5. 3 in case of two leg Lifting Slings, the hanging point shall be located on both sides of the lifting object and above the center of gravity. In case of three leg and four leg Lifting Slings, the hanging point shall be evenly located on the level of the center of gravity of the lifting object and above the center of gravity of the object to be lifted.

The post how many types of slings are there?Here introduces 3 types first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

It is the largest lifting weight of single equipment in China,Wire Rope Sling is made by LKS.

Core Abstract: on June 10, the world’s first 3000 ton slurry bed residue hydrotreating reactor, which was hoisted by Sinopec heavy lifting and Transportation Engineering Co., Ltd. and cooperated with the 10th Construction Company, was successfully hoisted in place after 15 hours, which refreshed the overall hoisting weight of a single domestic equipment. The super slurry bed reactor with the heaviest monomer in the world, No. 2141-r-200lc, is the reactor with the largest monomer tonnage in the world. The equipment has a unit weight of 3025 tons, a total length of 72 meters, an outer diameter of 6.156 meters.

On June 10, the world’s first 3000 ton slurry bed residue hydrotreating reactor, which was carried out by Sinopec heavy lifting and Transportation Engineering Co., Ltd. and cooperated with the 10th Construction Company, was successfully hoisted in place after 15 hours, refreshing the overall hoisting weight of a single domestic equipment.

The super slurry bed reactor with the heaviest monomer in the world, No. 2141-r-200lc, is the reactor with the largest monomer tonnage in the world. The unit weight of the equipment is 3025 tons, the total length is 72 meters, the outer diameter is 6.156 meters, and the wall thickness is 320 mm. It is the core equipment of Zhejiang Petrochemical 40 million tons / year refining and chemical integration phase II project.

The hoisting scheme of 5200t hydraulic lifting system main crane and 2000t crawler crane tail sliding is adopted.

The 5200t hydraulic lifting system has the following advantages: the hoisting capacity is large, which can minimize the impact on the construction site; it has the function of overall displacement and reduces the disassembly and assembly steps of the intermediate tower, so as to shorten the overall construction period.

After the reactor 2141-r-200lc was transported from the wharf to the site, the project Department of the second phase project of Zhejiang Petrochemical Company of the tenth construction company worked overtime to complete the preparation for the installation of the reactor cover and equipment.

At 9:17 am on June 9, the lifting of super slurry bed reactor started on time…

At 8 am on June 10, the hoisting of 2141-r-200lc reactor continued…

At 11:27 am on June 10, the reactor with the largest monomer tonnage in the world was hoisted in place! The whole process is safe and stable.

After the hoisting, the 5200t hydraulic lifting system will move as a whole to prepare for the hoisting of the second reactor 2141-r-200lb…It’s just a beginning…

If we read this article carefully,you will find there is a very important thing-lifting & hoisting!We should take carefully about the lifting,all things should be considered espcially about the breaking load of lifting slings.For such big liftings,we use 7:1 safety factor to satisfy with the lifting demands.LKING STEEL LIMITED joined in this lifting design and manufacture wire rope sling.

Here is some technical information from LKING STEEL LIMITED as your reference;

Product features

• Wire rope slings for lifting loads in industrial environments
• 6 x 37 IWRC (independent wire rope core) construction for greater flexibility than a 6 x 7 or 6 x 19 wire rope sling
• Eye-and-eye endings for vertical, choker, and basket lifting configurations
• Mechanical (also called Flemish) splice is stronger than a hand splice
• Meets ASME specification B30.9 and OSHA specification 1910.184

Product description

The LKING STEEL LIMITED 6 x 37 IWRC (independent wire rope core) single-leg wire slings have eye-and-eye endings and a mechanical splice for lifting loads with vertical, choker, or basket configurations in general industry applications. The 6 x 37 IWRC construction contains six strands of wire rope with approximately 37 wires per strand wrapped around a separate 7 X 7 wire rope, which has seven strands with seven wires per strand, in the center of the sling. This construction provides more flexibility than a 6 x 7 or 6 x 19 wire rope slings. The wire rope construction has more abrasion and heat resistance than a web sling. This eye-and-eye sling has an eye, or loop, on both ends, and can be used with vertical, choker, and basket lifting configurations. The eyes are secured with a mechanical (also called Flemish) splice that is stronger than a hand splice. This sling has a minimum D/d ratio of 25 and meets American Society of Mechanical Engineers (ASME) specification B30.9 and Occupational Safety and Health Administration (OSHA) specification 1910.184.

Slings are used to lift heavy objects for industrial applications. Types of slings include web slings, wire rope slings, chain slings, and mesh slings. The appropriate type of sling for an application depends on the strength-to-weight ratio, flexibility and resistance to bending, resistance to abrasion and cutting, resistance to crushing, resistance to stretching, and resistance to high temperatures and other environmental stressors. Slings have one, two, three, or four legs; or a continuous loop of webbing or wire rope. Legs are support branches that extend from a single point at the top of the sling to the item being lifted so the weight of the load is distributed evenly among the branches. Slings have eyes (loops) or alloy steel fittings on the ends.

A vertical lifting configuration connects a crane hook directly to a load with a single, vertical sling, usually by means of a hook. In a choker configuration, the sling wraps entirely around the load, and one loop passes through the other to form a slip noose, or choker. In a basket configuration, the sling passes under the load and both ends of the sling connect to the crane hook. Load capacity is the maximum weight to be lifted in a vertical configuration. The capacity in a choker configuration is approximately equal to the vertical capacity times 0.8. The capacity in a basket configuration, with sling ends at a 90-degree angle, is approximately equal to twice the vertical capacity. Load capacity in a basket configuration decreases if the angle of the sling is less than 90 degrees. For example, a sling with a capacity of 2,000 lb. in a vertical configuration will have an approximate capacity of (2,000)(0.8)=1,600 lb. in a choker configuration and an approximate capacity of (2,000)(2)=4,000 lb. in a basket configuration, if the sling ends are at a 90-degree angle to the load. A wire rope sling’s capacity in a basket configuration applies only when the configuration meets the sling’s minimum D/d ratio, which is the ratio of the diameter of the rope’s curve around the load (D) to the diameter of the sling (d). If the minimum D/d ratio is not met, the capacity of the sling is decreased.

LKING STEEL LIMITED Lifting Technologies manufactures lifting solutions including slings, cranes, and hoists. Founded in 1967, the company is headquartered in Shanghai, China.

Attention for lifting

A) if a single leg cable sling, the hanging point must be located directly above the center of gravity of the suspended object.
B) if the 2legswire rope sling, the hanging points should be on both sides of the goods and the hooks are above the center of gravity of the suspended objects.
C) if it is three legs or four legs wire rope sling, the hanger must be proportioned on the plane around the cargo and the hook is located directly above the center of gravity of the suspended object.

Pressed Steel Wire Rope Slings

• ZL 2006 3 0000330.7

• This specification of the wire rope used for the working load: from 6mm to 60mm with construction 6 x37 type b-1670.
• Different construction of the rope means different working load, we can calculate the working load according with the steel wire rope construction which the customer required.
• The sling’s breaking load is 5 times of the working load.
• When the wire rope diameter is up to 90mm, should be pressed two aluminum alloy joints on each end of sling.
• We use one aluminum ferrule painted with the blue color as the quality ID of LKS Sling.

Wire rope sling specification

Approx. eye length A is not applicable to the WCF and WCW series.

The post LKS Wire Rope sling Success hoisting of the world’s first 3000 ton Super Reactor first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

High Quality Bright Wire Rope from LKS

The specification and model of bright wire rope shall meet the requirements of tower crane operation manual, with good lubrication and no friction with metal structure. The steel wire rope shall not be twisted, flattened, bent, broken strand, cage shaped distortion and broken core, and shall not be seriously worn. (the diameter shall not be reduced by 7%, and the number of broken wires shall not be greater than 10% of the total number.)

The main wire rope is an item that must be checked in the inspection. If the main wire rope is not qualified, it can be judged that the tower crane installation is unqualified. Please check yourself.

The steel wire rope is an important link in the hoisting process, and any slip or loss will lead to major events. Therefore, the inspection of steel wire rope is particularly important. TST steel wire rope flaw detection system is suitable for single person to carry, or easy to temporarily install and transfer. It can detect the static and non moving steel wire rope, and can also detect the moving wire rope.

A、 What should the wire rope check and how to check wire rope?

1. Whether the wire is broken: the steel wire whose crack or scar has reached half of the diameter of the steel wire is regarded as broken wire.
2. Check wear and damage: pay attention to concentric wear and eccentric wear.
3. Corrosion: check the degree of corrosion, pitting corrosion and pitting corrosion. It is easy to corrode in rainy season in South China.
4. Deformation: check the twist, waviness and flatness to confirm the deformation degree.
5. Arc and heat effect: if the steel wire is found to be tempered or burnt, the wire shall be broken.
6. Check the fastening parts of the rope end: check whether the fixed part of the rope end is pulled out or sliding due to the defects, cracks and deformation of the pressing block.
7. At the same time, pay attention to the drum and pulley: check the wear condition at the bottom of rope groove and the rotation of pulley.

B、 In case of any of the following conditions, the wire rope shall be scrapped:

1. For the cross-wound wire rope, the number of broken wires in a lay length (refers to the axial distance around a circle of any wire rope strand) reaches 10% of the total number of wires in the rope.
2. The number of scrapped broken wires of wire rope for hoisting hot metal or dangerous goods shall behalf of that of the general crane, i.e. 5%.
3. The corrosion or wear of the steel wire on the surface layer of the wire rope reaches 40% of the original wire diameter on the surface.
4. The wire rope has obvious internal corrosion.
5. The diameter of the wire rope is reduced by 7%.
6. There are cracks or slip deformation at the joint between the steel wire rope and aluminum alloy; the splicing part of the spliced steel wire rope is seriously pulled off; the joint between the cast steel wire rope anchorage and the steel wire rope is displaced, resulting in the pull-out phenomenon.
7. There are wear or corrosion on the surface of Bright wire rope and a certain number of broken wires.
8. The whole strand is broken or burnt out.
9. The elongation of partial outer steel wire rope is “cage” shape or the diameter of steel wire rope fiber core increases seriously.
10. Serious deformation of wire rope, such as kinking, dead angle, hard bending, plastic deformation, hemp core falling out, etc.

LKS offer long service life bright wire rope for different applications

Bright steel wire rope refers to general wire rope without surface treatment, free from zinc, tin, copper and other types of metallic coatings. So they are normally lubricated with grease to protect the wire rope from corroding.

Feature:

• Made of high quality high carbon steel.
• With lower price than galvanized wire ropes.
• Capable to carry same loads as galvanized wire ropes.
• Long lasting if used in climate controlled environments.
• Available in the diameter from 1.2mm to 19mm.

Application:

• Lifting cranes.
• Tackles.
• Choker ropes.
• Machines in various industries.
• Dredging.
• Excavating.

A coil if bright steel wire rope is fully lubricated for shinny surface.

• Trolley lines.
• Logging.
• Oil.
• Boom lines.
• Marine applications.
• Winch lines.

6 × 7 FC

6 × 19 FC

6 × 19 IWRC

6 × 21 FC & Filler wire

6 × 26 IWRC & Compacted

6 × 37 FC & WS

6 × 37 IWRC & WS

19 × 7 WSC & Rotation resistant

8 × 19 IWRC & Rotation resistant

19 × 19 WSC & Rotation resistant

Note:
Here, the word “bright” doesn’t mean shiny. Normally, the shiny surface of wire ropes only occurs when they are submerged in oil.

The post Bright Wire rope unqualified 19 pictures summary! Better to Know first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

Elevator Wire Rope from LKS

Abstract: the elevator wire rope mainly refers to the traction steel rope. The traction rope bears all the weight of the elevator, and in the operation of the elevator, it bends in one direction or alternately around the traction wheel, guide wheel or anti rope wheel. The steel rope also bears high specific pressure in the rope groove, so the steel rope must have high strength, flexibility and wear resistance. This paper analyzes the main factors affecting the fatigue life from the installation, use, maintenance and production process of the steel rope.

The steel rope is a load-bearing element in the elevator, which almost bears all the weight of the elevator. The quality of the steel rope will directly affect the safety of the elevator operation. In the operation of the elevator, the wire rope is bent unidirectionally or alternately around the traction wheel, guide wheel and anti rope wheel. The steel wire rope bears high specific pressure in the rope groove, so the steel wire rope for elevator is required to have high strength, flexibility and wear resistance.

The steel rope is generally circular strand structure, which is mainly composed of steel wire strand and rope core. Steel wire is the basic component of wire rope, which requires high strength and toughness. The strand of wire rope is made of steel wire, usually 8 to 9 strands. The core is usually made of sisal fiber or synthetic fiber of alkene.

The factors affecting the service life of steel rope for elevator mainly include the following aspects: safety factor of traction steel wire rope, tensile load of steel rope, bending radius of steel rope in use, material and groove type of traction wheel, material and twisting quality of steel wire rope itself, lubrication of steel wire rope, use and maintenance of wire rope, etc.

1. Safety factor of traction wire rope

The safety factor of elevator partly depends on the safety factor of traction wire rope. There are static and dynamic loads in the operation of elevator wire rope, but the main factor affecting the service life of steel wire rope is static load. In practical application, in order to simplify calculation, only static load is considered for practical calculation. The diameter of steel wire rope for elevator is very important. In order to improve the strength of steel wire rope and prolong its service life, the diameter of steel wire rope must be the most appropriate size. For the calculation of safety factor, the corresponding safety factor is calculated according to the national approved standard by selecting the diameter of steel wire rope, so as to ensure the safety performance of steel wire rope for elevator The service life of the rope.

2. Tensile load of steel rope

The tensile load is the load that the elevator wire rope bears in the operation of the elevator and the variation in its movement. In a well maintained and debugged elevator, the load of each steel rope in the operation process should be basically the same. If the tension of each rope is uneven in operation due to improper maintenance of the wire rope, the compressive stress between one or several wire ropes and the wheel groove will be greatly increased, which will accelerate the wear of the wire rope and directly affect the service life of the wire rope. Therefore, it is clearly stipulated in the elevator supervision and inspection rules that the deviation between the traction wire rope tension and the average value is not more than 5%.

3. Bending radius of steel rope in use

The curvature radius of steel rope is determined according to the pitch diameter and relative position of traction wheel, anti rope pulley and guide wheel in the use of steel wire rope. Different positions and different pitch diameter determine the bending times and bending stress of steel wire rope in use. The bending stress is inversely proportional to the pitch diameter of each wheel. Article 9.2.1 of gb7588-1995 < Safety Code for elevator manufacture and installation > > stipulates that the ratio of pitch diameter of traction wheel, pulley or drum to the nominal diameter of suspension rope shall not be less than 40 regardless of the number of strands of steel wire rope. During the bending process of steel wire rope, the relative displacement of steel wire in the strand occurs, and there is wear inside. The greater the bending stress, the greater the contact stress between strands With the accumulation of time, the steel wire will break because of stress concentration. Therefore, under the condition that the traction capacity is satisfied, the radius of curvature should be increased as much as possible, the number of rope wheels should be reduced, the reverse bending or twisting of wire rope should be avoided, and the bending stress of steel rope should be reduced in the process of using, so as to reduce the adverse factors on the service life of wire rope.

4. Traction wheel material and groove type

4.1 the groove type and material of traction wheel are closely related to the service life of steel rope. Generally speaking, the wear of steel rope should be very slow due to its higher hardness than rope operation. However, due to the matching of the rope tension and groove type, the elevator wire rope slips, eccentric wear and roll in the groove, which causes wear with the rope groove. Generally, there are semicircular groove, semicircular groove with notch and V-groove. The contact area between the semicircular groove and the rope is relatively large, the specific pressure distribution of the wire rope in the groove is more uniform, and the wear of the rope is relatively small. In order to limit the deterioration of traction conditions due to wear, the lower part of traction wheel is often cut when the rope groove is not subject to additional hardening treatment. The specific pressure distribution of steel rope in the semicircular groove with notch is relatively concentrated, and the specific pressure increases when the notch angle increases. However, due to the small contact area between V-groove and steel wire rope, the specific pressure distribution of steel rope in the rope groove is relatively concentrated, the V-shaped angle is reduced, the specific pressure is increased, and the damage to the steel wire rope is greater in use, which affects the service life of the wire rope.

4.2 generally, the hardness and elastic modulus of the groove should be considered for the material of traction wheel. If the material with soft material is used, the external stress will be reduced, but the wear of the steel wire rope will turn to the inside of the wire rope, and the fracture of the steel wire inside the wire rope will increase. Therefore, it is suggested to use polyurethane rope groove liner on the traction wheel. The liner is embedded into the corresponding groove, and transverse grooves are processed on the liner. The friction coefficient of the appropriate grooved wheel to the non lubricated steel wire rope is almost unchanged, and the polyurethane wear resistance is also very good, which improves the service life of the liner and greatly increases the service life of the elevator wire rope.

5. Steel rope itself

Fatigue is one of the main reasons for more broken wires in the process of using elevator wire rope. The broken wire of elevator wire rope moving around traction wheel is the result of bending fatigue and wear fatigue. The research and understanding of the production process and fatigue essence is helpful to take measures in the production process, improve the fatigue resistance of elevator wire rope and prolong the service life of elevator wire rope It can reduce the operation cost and improve the safety and reliability of elevator operation.

5.1 effect of rope making steel wire

The best metallographic structure is suitable for drawing steel wire. In the production process, due to the surface damage of steel wire, or serious scratches, scars, rust pits, and non-metallic inclusions formed in the steel smelting process, it is easy to form fatigue sources. The content and particle size of non-metallic inclusions in steel have a significant impact on the fatigue performance of steel  rope, because the reticular ferrite in the metallographic structure after sorbite can promote the rapid propagation of fatigue crack, so the network ferrite is not allowed in lead quenched steel wire. The austenitizing temperature of steel wire and the isothermal transformation temperature of lead quenching determine the generation of network ferrite Qualitative influence, the automatic control furnace temperature and lead temperature technology of lead quenching production line is conducive to the uniformity of sorbite structure, and the lead liquid circulation is conducive to the uniform sorbite structure of steel wire at different positions in the lead pot, which can ensure that the strength of steel wire after lead quenching is relatively uniform, so as to ensure the minimum fluctuation range of mechanical properties of steel wire after drawing. The optimum combination of strength and toughness is beneficial to improve the fatigue resistance of wire rope. Generally, straight wire drawing machine and water box drawing machine belong to non torsion drawing, which is beneficial to obtain high strength and high toughness steel wire. The lubrication and cooling capacity of water tank is better than that of dry wire drawing machine. Larger diameter drum and tower wheel can reduce the bending deformation of steel wire winding. Multi pass low compression ratio drawing can obtain high toughness.

5.2 selection of steel rope structure

The structure of wire rope has an important influence on the fatigue resistance of steel rope. Generally, surface contact steel rope is caused by line contact wire rope, and wire contact wire rope is caused by point contact wire rope. For the steel rope for elevator, due to the limitation of service conditions and the relatively narrow space environment of elevator shaft, the traction wheel with larger diameter cannot be selected. The rigidity and flexibility of surface contact wire rope are large, because the elevator wire rope produced by forging, die drawing or rolling is rarely used. 6-strand or 8-strand wire contact wire rope is used for ordinary elevator rope, and parallel twisted wire rope is used for high-speed elevator. According to the design concept of modern steel steel rope, it is beneficial to improve the fatigue resistance of steel rope to keep proper gap between strands and layers of steel rope, but the gap between strands and ropes must be uniform. Therefore, it is very important to determine the wire diameter ratio, wire diameter tolerance and hemp core diameter.

5.3 selection of steel rope grease

The quality of grease used in steel wire rope has an important influence on the fatigue resistance of steel rope. It must be selected according to the use and environment of steel rope and the technical index of grease. The elevator wire rope is mainly used in the indoor elevator shaft. When the elevator shaft does not take temperature and humidity control measures, the internal environment of the elevator shaft is closely related to the overall environment of the area, such as low temperature and dry in the northeast, high temperature and humidity in the southern coastal area. The regional temperature and humidity are very different, so the use of steel wire rope end users must be considered when selecting grease The effect of temperature on the physical properties of oil is obvious. The lubricity of the steel wire rope should be kept as long as possible. The grease has certain high and low temperature performance. Generally, the high temperature performance is measured by the drop point of the grease, and the low temperature performance is measured by the low temperature brittleness of the grease. The selected grease should ensure that the high temperature does not drip and the low temperature does not embrittlement.

5.4 oil application method and quantity of elevator rope

In the production process of elevator wire rope, the oiling of rope strand can be generally divided into wire oiling, strand oiling and rope oiling, and the oiling methods can be divided into immersion type and spray type. According to the purpose of the production of steel wire rope to determine the oiling method, but must ensure that the oil evenly distributed on the surface of the steel wire, at the same time for the physical properties of the selected grease, twisting speed to determine the oil content to meet the requirements. Generally, too high oil temperature will lead to grease denaturation, too large amount of oil will reduce the friction between the wire rope and the traction wheel, which is easy to throw out in the process of use; too small amount of oil will reduce the lubrication performance of the wire rope and reduce the fatigue resistance of the wire rope.

5.5 selection of rope core

Most of the steel rope of elevator adopts fiber core structure, and few of them use metal core. The main function of the rope core is to support the rope strand to keep its original shape in any state. Secondly, the rope core can store grease. In the process of use, the oil source for long-term lubrication of the steel wire rope can make the steel wire well lubricated. In addition, it can improve the contact between steel wire strands and wires and reduce the impact load. Therefore, the performance of the rope core has an important impact on the service performance of the wire rope. If the rope core is too thin, the diameter of the wire rope will be reduced, and a certain gap can not be maintained between the strands; if the rope core is too thick, the diameter of the wire rope will increase and the gap between the strands will be generated; if there is a large hemp core joint, the wire rope will bulge, and the contact between the wire rope and the rope wheel will wear quickly due to stress concentration, resulting in wire breakage and strand breakage, so as to ensure the straightness of the rope core Diameter accuracy and joint control are very important. It is one of the ways to prolong the bending fatigue life of the steel wire rope by using the wire rope with high elastic core to reduce the contact stress between the strands when the wire rope bears the bending stress on the rope pulley.

5.6 Steel rope twisting process

The quality of Steel rope twisting directly affects the fatigue life of steel wire rope. The following mainly analyzes the selection and use of twisting process parameters.

5.6.1 selection of lay length

Lay distance is a very important parameter in the technical index of steel wire rope, which has a great influence on the comprehensive performance of wire rope. The size of lay distance directly affects the production efficiency of steel wire rope, the strength loss in the process of steel wire twisting, the breaking force of the whole rope, the flexibility, looseness, fatigue resistance, pressure resistance, impact resistance, structural elongation and diameter of steel wire rope. Therefore, the choice of lay distance should not be too large or too small, and the comprehensive influence of various factors should be considered.

5.6.2 use of tooling

Pre deformer and post deformer are the main fixture for wire rope production. The design of main process parameters is generally based on wire rope diameter, strand diameter and experience

According to the formula, in order to make the parameters more reasonable and scientific, combined with practical production experience and the strength level of wire rope, the process parameters are formulated respectively.

5.6.3 use of pretensioning

The main purpose of wire rope pretensioning is to partially or completely eliminate the structural elongation of steel wire rope that cannot be completely avoided in use. Proper pre tensioning treatment can eliminate the twisting defects of steel wire rope, improve the uniform distribution of tension of steel wire and wire rope strand when bearing, make the strand rope in the most stable position in structure, which is conducive to improve the fatigue strength of steel wire rope and prolong the wire rope Service life.

6. Lubrication of Steel rope

The lubrication of elevator rope can effectively reduce the friction of steel wire rope and prolong the service life of steel wire rope. Generally speaking, in the applicable places with large diameter of traction wheel and dry temperature, the steel wire rope still has enough lubricating oil after using for 3 to 5 years, and it is not necessary to add new oil. However, no matter how long it is used, maintenance lubricating oil must be added as long as rust or drying signs occur on the elevator wire rope.

7. Use and maintenance of elevator rope

The use and maintenance of elevator rope is to effectively maintain the steel wire rope after the completion of elevator installation, mainly from the following four aspects of maintenance and replacement, to ensure the safe use of elevator rope, and achieve the expected service life.

7.1 during the operation of the elevator, timely and regularly check the operation condition of the steel wire rope, mainly including the number, position and twist distance of the steel wire rope; the thinning of the wire rope diameter; the uniform tension of the wire rope; the lubrication, cleaning and corrosion of the steel wire rope; whether the assembly of the steel wire rope end has elongation or abnormal conditions.

7.2 observe the wear and deformation of the elevator wire rope during operation, and confirm whether to replace it with a new one. The phenomenon of sudden fracture of elevator wire rope under normal working conditions is rare, and its damage is generally formed in long-term operation due to wear, bending fatigue, corrosion or external damage, so timely observe the abnormal phenomenon of steel wire rope in operation to avoid unnecessary safety factors.

7.3 for the condition of elevator wire rope in rope groove, check whether the working surface of rope groove is smooth and whether the depth of steel wire rope lying in rope groove is consistent.

7.4 corrosion inspection of elevator wire rope: the elevator steel wire rope will rust during the use process, the mechanical properties will be reduced, the diameter of steel wire will become thinner, and the strands will be loose, resulting in brittle fracture. This kind of fracture is avalanche fracture, which is more dangerous than general wire breaking or wear. Regular addition of maintenance lubricating oil is a way to prevent wire rope corrosion.

Conclusion: as the most important part of elevator suspension device, elevator wire rope plays an important role in the safety performance of elevator. In the production process, the design of process parameters and the control of production process have a crucial impact on the fatigue resistance of steel wire rope. Taking measures against these factors can improve the fatigue resistance of wire rope. In the use of elevator wire rope, the correct installation and maintenance can also extend the service life of  steel rope.

LKS elevator wire rope recommands;

Our elevator rope wire is made from bright phosphated and redrawn galvanized wires. They are designed for use in traction- and deflection sheaves. Featuring high tensile strength and excellent ductility, the wire helps increase the service life of your rope. Meets EN-10264-2 specifications. The wire is customizable to your project.

Assuring your performance

Bekaert has a full range of elevator rope wire of bright phosphated and redrawn galvanized wires. They are ideal for the creation of elevator ropes because of their high tensile strength and excellent ductility. On the rope level, these properties lead to optimal fatigue performance. The wire can increase the service life of your rope and reduce your rope’s maintenance.

Meeting your requirements

The smooth coating surface of the wire, and the adapted packing they come in, helps your production process run smoothly. They are suitable for double-twist stranding machines. Bekaert elevator rope wire meets the standard EN-10264-2 specifications. Our global team of experts can also help customize the properties to your specific requirements.

Creating a reliable tension member

The quality of the steel wires used for elevator cores has a substantial impact on the service life of the rope. When running over the traction- and deflection sheaves, the wires in the rope are exposed to high tension- and flexural stresses, causing friction which will result in abrasive wear. Our elevator rope wire’s excellent mechanical properties are a solution for these issues.

Elevator Steel Wire Ropes with FC & IWRC

Steel wire ropes are one of the best choices for elevator applications owing to its two main features: redundancy and detectability as shown below:

• Redundancy is very important for safety-relevant applications. If one of individual elements is broken, other elements will take on its function and remain in operation taking advantages of interaction between wires.
• Detectability means the capacity to determine the end of service life and the degree of bending fatigue of running wires. As fatigue increase, more external wire breaks so that it is possible to estimate by visible inspection before the condition becoming dangerous.

Normally, elevator wire ropes feature parallel strand construction for reducing incidence of abrasion compared with ropes with cross laid construction. Meanwhile, they have a high fatigue bending life and less wear to running sheaves.

Construction:
Depending on the intended needs, two different core types are available: fiber core (FC) and independent wire rope core (IWRC).

• Fiber core, made of natural or synthetic fibers, is widely used in ropes and makes elevator ropes easier to adjust up to the relevant groove shape. Meanwhile, fiber core provides excellent resistance against contact pressure and long-term support for elevator wire ropes.
• Independent wire rope core effectively increases the metallic cross-section of elevator wire ropes and reduce tensile stress in individual wires. Meanwhile, steel cores low the elongation of elevator wire ropes under same loads compared with fiber core.

Normally, an elevator wire rope is composed of six, eight or nine strands with FC or IWRC as shown in the following pictures:

Standard elevator wire ropes with FC

6 × 19 FC & Warrington

6 × 25 FC & Filler wire

8 × 19 FC & Warrington

8 × 19 FC & Seale

8 × 21 FC & Filler wire

8 × 25 FC & Filler wire

Six strands FC style:

• Large metallic cross section for high breaking loads.
• Relatively lower elongation.
• Competitive price per meter.
• Ideal for slow traveling freight elevators.
• Suitable for low-duty passenger elevators.

Eight strands FC style:

• Rounder cross section than six strands ropes.
• Favorable contact pressure condition.
• Flexible cross section for easier adjustments to worn grooves.
• Thinner wires offer better fatigue bending property.
• Medium price per meter.

8 × 19 IWRC & Warrington

9 × 21 IWRC & Filler wire

9 × 25 IWRC & Filler wire

Eight strands IWRC style:

• Rounder cross section than six strands ropes.
• Suitable for grooves with a large undercut.
• Little or no permanent and elastic elongation.
• More flexible structure offers better fatigue bending property.
• Ideal for heavy-duty elevators

Nine strands IWRC style:

• Offer an extremely round cross section
• Low contact pressure between rope and groove.
• Minimal permanent and elastic elongation.
• Much thinner wires offer better fatigue bending property.
• Ideal for all elevators with large shaft height.
• Suitable for traction drive elevators with a larger number of deflection sheaves.

Details:

• Material: quality bright steel wires, galvanized steel wires or stainless steel upon request.
• Nominal tensile strength: 1370N/m², 1570N/m², 1770N/m² up to 2500N/m² as your request.
• Cable diameter: 1/4″ to 3/4″ or custom diameters.
• Structure: parallel laid structure.
• Packing: in coils wrapped with oil paper and hessian cloth or on wooden reels.
• Core: FC or IWRC.

The post Here! Understand the 7 influence factors of elevator wire rope service life first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

LKS Crane Wire Rope in 1200TONS Crane

In the afternoon of June 8, with the 350 ton crane arm slowly put back to the shelf, the installation of crane wire rope for 1200 ton pile around crane and 350 ton pile winding crane of H6018 ship was successfully completed, and the maximum work before the tilt test of the project was successfully completed.

The deck of H6018 ship is equipped with two pile winding cranes, including five 1200 ton crane wire rope, two luffing wire rope of 50 * 1500 meters, two main hook wire ropes of 58 * 2000 meters, and one auxiliary hook wire rope of 50 * 1000 meters; the 350 ton crane has three luffing wire rope of 42 * 900 meters * 1, the main hook wire rope of 42 * 1200 meters * 1, and the auxiliary hook wire rope of 42 * 300 meters * 1.

The installation of the above crane wire rope involves 690V main power supply of the crane, ballast adjustment of the ship and installation of the sliding contact line. Among them, the steel wire installation of the 1200 ton crane needs floating berthing, and the floating berthing needs to reserve a distance of 70 meters from the stern. The ship needs to be moved, and the cross operation with the pile leg is carried out, and the extreme weather is also faced…

Due to the heavy workload, complex process and many cross operations, and the ship ballast can not be used, it is difficult to adjust it manually. According to the past experience, the period needs one month, which will not meet the requirements of tilt test.

On May 20, the project team took the lead to organize ZPMC manufacturers, material department, general assembly department and other units to hold a special meeting, which launched a “battle against the clock” to ensure the node.

Retrospection

1、 Set up a temporary group to tackle difficulties and overcome difficulties

At the symposium, a temporary group for tackling difficulties was established, which was composed of project team, design department I, material department, commissioning operation area, ship loading operation area, electric loading operation area, mechanical loading operation area, technical construction method personnel, lifting workers, erection workers and other personnel. The division of labor was clear, the responsibilities were assigned to each person, and all the personnel made concerted progress;

2、 Strong plan

Formulate a special plan with the morning, afternoon and evening shift as the time points, and make it clear that the work will be completed on June 8. The node is the order, and the plan will not be relaxed;

3、 Focus on planning:

The start of the project coincides with the two sessions and the safety month. The rope threading process involves factors such as floating state adjustment, high-altitude operation, extreme weather and other factors. Therefore, it is planned to adjust the operation to the daytime. The shift is carried out at noon to race against the time. During this period, the generator characteristic test and crane cross operation, peak stagger planning is particularly critical. At 5:30 a.m. every day, the commissioning operation area is in place, the generator power supply is turned on, the Zhenhua construction personnel are in place to start operation, the machine installation personnel keep on adding water and drainage, waiting for ballast adjustment, and the gantry crane is on duty for 24 hours at any time;

4、 Dare to innovate:

Since the installation of the sliding contact line of the 1200 ton crane involves professional manufacturers, the installation cycle takes about 10 days, which can not meet the planned demand. At the meeting, it was immediately decided to use the temporary power line for bridging. In the commissioning operation area, the cable was constantly searched and collected, and the lunch break was actively given up to complete the temporary cable bridging work.

Overview of operation

From May 21 to 23, 1200 tons of electrified idling inspection and luffing crane wire rope installation

From May 25 to 31, 350 ton sliding contact line installation, medium voltage cable withstand voltage inspection, idling inspection, h6018 ship moving

From June 01 to June 06, the installation of 1200 tons of main and auxiliary crane steel wire ropes was completed

June 07-08 350 tons of main and auxiliary crane wire rope installation completed

The above series of data are created by the joint efforts of all staff of H6018 project team after half a month’s hard work, which shortens the planned one month cycle to 18 days and compresses a full 12 days.

Here show crane wire rope specification:

Crane Wire Ropes for Hoisting & Lifting

Crane wire ropes play an important role in ensuring a smooth conduct of work processes in harbors, off-shore platforms or various other applications where cranes are needed. Whether you need tower crane ropes or offshore crane ropes, galvanized or stainless steel ropes, you will find the optimal solution in our company.

High resistant to corrosion.Features:

• Excellent ductility for optimal fatigue properties on rope level.
• Highest breaking strength leading to outperforming steel crane wire ropes.
• Excellent impact resistance owing to its radially elastic rope structure for absorbing dynamic force easily.
• Superb flexibility ensures excellent spooling conditions in multiple layer winding and all hoisting processes.
• High cost-effectiveness taking advantages of its strong and durable structure to reduce downtime and maintenance cost.
• Rotating and rotation resistant ropes are available.
• Optional compacted and non-compacted ropes.

Details:

• Material: high carbon steel wire, galvanized steel wires or stainless steel wires.
• Standard: complying with EN-10264 or other custom specs.
• Tensile strength: 1370N/mm² up to 2260N/mm².
• Coating: bright phosphate wire, galvanized wire or other custom coatings.
• Wire diameter: 0.3mm to 4mm or thicker diameter upon request.
• Structure: rotating & rotation resistant wire ropes, compacted & non-compacted wire ropes.
• crane wire rope standards

CWR-826 WS

Feature:

• Eight regular strands
• Parallel lay structure.
• Fully lubricated.
• Non-rotating.
• Application: electrical hoist, twin hoist, lifting device.

CWR-10 Compacted

Feature:

• Ten compacted outer strands
• Parallel lay structure.
• Fully lubricated.
• Non-rotating
• Application: electrical hoist, twin hoist, lifting device. Not suitable for overhead cranes and using with swivels.

CWR-347Compacted

Feature:

• Thirty-four compacted strands.
• Low rotation.
• Optional plastic encapsulated core.
• Application: tower crane, electrical hoist, mobile crane, boom crane, offshore crane and overhead crane.

CWR-636 Compacted

Feature:

• Six compacted strands.
• Non-rotating.
• Optional plastic encapsulated core.
• Excellent crush resistant.
• Application: container crane, tower crane, boom crane, unloader crane, dockside cranes, offshore crane and overhead crane.

CWR-826 Compacted

Feature:

• Eight compacted strands.
• Parallel-laid structure.
• Excellent crush resistance.
• Extremely high breaking force.
• Applications: boom crane, dockside cranes, offshore cranes and overhead cranes.

.

CWR-826 Plastic injected

Feature:

• Eight compacted strands.
• Plastic encapsulated core.
• Ideal for multi-layer coiling.
• Reduced stretch.
• Application: boom crane, unloader crane, dockside crane, offshore crane and overhead crane.

CWR-187 Compacted

Feature:

• Eighteen compacted strands.
• Optional plastic encapsulated core.
• Rotation resistant.
• Application: tower crane, mobile crane, boom crane, dockside crane, offshore crane and overhead crane.

CWR-1819 Compacted

Feature:

• Eighteen compacted strands.
• Rotation resistant.
• Ideal for single-fall and multi-reeve applications.
• Application: offshore crane, mobile crane, overhead crane.

CWR-637 WS

Feature:

• Six strands. .
• Durable design.
• High flexibility.
• Application: container crane, clamshell crane, tower crane, mobile crane and overhead crane.

.

CWR-626 WS

Feature:

• Six strands.
• Good balance between wear resistance and flexibility.
• Fully lubricated.
• Application: container crane, tower crane, mobile crane, overhead crane and offshore crane.

CWR-6 Swaged

Feature:

• Six special wire strands.
• Hammer swaged for high damage resistance.
• Smooth surface area reduces wear of sheaves and drums.
• Application: container crane, tower crane, offshore crane and clamshell crane.

CWR-728 Seale

Feature:

• Seven outer strands.
• Good spooling in single layer & multi-layer winding applications.
• Application: overhead crane and various high cycle applications.

Tips:
When you are picking up crane wire ropes, make sure that the breaking strength of new wire ropes is five times the sizes of the largest load for lifting applications and three times for pulling applications.

The post Installation of 1200TONS Crane Wire Rope There is no fastest, only faster first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

At the beginning of 2019,LKS High performance Wire Ropes used in the lifting of “The world’s first crane”, the construction and installation site of the largest equipment (ethylene 2 propylene tower) of China Science and technology refining and chemical integration project, “the world’s first crane” challenges the hoisting of 1000 ton ethylene 2 propylene tower with the largest volume, the highest height, the largest hoisting difficulty and the highest hoisting requirements of the island refining and chemical project.

XCMG xgc88000 4000t crawler crane and 1250t crawler crane have double tail sliding. The main crane 4000t crawler crane adopts 102 main boom + 33m fixed auxiliary boom working condition, and the working radius is 34m. The ethylene 2 propylene tower with a diameter of 6.804m was successfully installed in place. The erection height is 108.6m, and the main hoisting weight is 1435t

On March 15, 2019, the “fattest” large tower of China Science and technology refinery project, the quench oil tower of 800000t / a ethylene steam cracking unit, was successfully hoisted and fixed.

On April 4, 2019, in less than 3 hours, the large ethylene tower with a height of 100 meters, a diameter of 5.2 meters and a weight of 800 tons in the ethylene refining plant of China Science and Technology Corporation jumped up in the air and stably hoisted in place.

On June 20, 2019, XCMG xgc88000 crawler crane, the “Big Mac” combined with 500t crawler crane, successfully hoisted the absorption tower of coal to hydrogen plant, a large-scale refining equipment of China Science and Technology Corporation. The lifting equipment is the first high tower of the coal to hydrogen plant and the key core equipment of the plant, with a diameter of 4.8m, a height of about 90m and a total lifting weight of more than 800 tons.LKS High performance Wire Ropes is used for lifting.

For sure XGC 88000 crawler crane is the big guys in the lifting engineering, there is the most important we should take care is the crane wire rope,LKS specially manufactures Wire Rope for XGC 88000.Then we can see this big guy to lifting the products easily and safety.

What should be paid attention to in the use of High performance Wire Ropes?

First of all, no matter what type of High performance Wire Ropes, pay attention to the lubrication effect; if the crane wire rope is not lubricated in place and the grease cannot effectively penetrate into the wire rope strand, the wire rope will cause early wire breakage, especially the internal core after long-term wear and corrosion.

Second, the steel wire rope of the crane should pay attention to the kink phenomenon. If the special steel wire rope of the crane, such as 35W * 7 / 4V * 39s + 5FC, is not installed in place, there will be stress phenomenon at the beginning of the installation. Then the High performance Wire Ropes without rotation will also kink during the lifting of heavy objects, and some steel wire ropes will bite on the rope arranging drum.

So what if the Wire Ropes head of the truck crane is treated? When installing a new steel wire rope for the crane, the two ends of the new rope shall be tied tightly with thin soft wires to prevent loose ends and strands.

So how to eliminate the kink and undercut of wire rope? In general, when the new wire rope is uncoiled, we should keep the High performance Wire Ropes in a horizontal and natural state, so as to eliminate the stress, so as to avoid the kink phenomenon and extend the service life of the wire rope when replacing the wire rope.

What is wire rope specifications construction?

Product Parameter

The post LKS high performance wire ropes in “The world’s first crane” in 2019 show best of best first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

Long threaded stud assembly for a commercial application.

The post Long threaded stud assembly for a commercial application. first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED

Twenty 8mm x 2metre 7×19 g2070 wire rope slings complete with copper ferrule swaged thimble each end, made and proof load tested to 16.3kN.

The post Twenty 8mm x 2metre 7×19 g2070 wire rope slings complete with copper ferrule first appeared on LKING STEEL LIMITED and is written by LKING STEEL LIMITED