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Why Polyester is Preferred for Lifting & Lashing Field?

In the selection of materials for lifting and lashing equipment, two synthetic fibers, polyester and nylon, are often compared. Both materials offer high strength, wear resistance, and stable performance, making them widely used in industrial applications. However, when it comes to specific products such as   flat webbing slings, round slings, and ratchet tie-down straps , polyester has become the industry’s standard choice. So, what exactly are the differences between polyester and nylon? And why are most lifting and cargo securing products based on polyester rather than nylon? What Is Polyester Fiber? Polyester fiber, commonly known as  PET (Polyethylene Terephthalate) , is one of the most widely used synthetic fibers in industrial applications. Key Characteristics of Polyester: High tensile strength Low elongation under load Excellent dimensional stability Low moisture absorption Good resistance to UV exposure and acids Consistent performance in outdoor environments What Is...
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Lifting Sling Colors: What They Mean for WLL, Durability, and Safe Use

  The colors on   lifting slings   are far more than visual decoration—they serve as a critical safety language on the job site. Different colors correspond to different Working Load Limits (WLL), allowing operators to quickly identify and select the correct sling, thereby preventing misuse from the start. However, in practical use, color is often misunderstood—particularly when it comes to durability, fading, and how to respond when fading occurs. This article explains the relationship between sling color and WLL, examines whether color affects product lifespan, analyzes the causes of fading, and provides clear guidelines for handling faded slings. The Relationship Between Color and WLL Color as a quick identification tool For webbing slings and round slings—particularly those manufactured according to  EN 1492 standards —colors are commonly used to indicate the Working Load Limit (WLL). This allows users to identify sling capacity at a glance, even in busy or low-v...
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Lifting Sling Testing Speed: Why It Matters and How to Control It Properly

  How Fast Should You Test Lifting Slings? When testing lifting slings, most people focus on  test load  and  safety factor . But there is another critical parameter that is often overlooked:   Testing speed (loading rate). The speed at which the load is applied can directly affect: Test accuracy Safety during testing Final test results Sling performance evaluation In this article, we explain  why testing speed matters , how it affects different sling types, and best practices for setting the correct speed during sling testing. Why Testing Speed Matters for Lifting Slings Testing speed refers to  how fast the load is applied  to the sling during proof or breaking tests. If the loading speed is: Too fast  → shock load, unstable readings, unsafe conditions Too slow  → inefficient testing, possible creep effects on synthetic slings Proper speed ensures: Stable load application Accurate test data Compliance with industry standards Protection...
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A Complete Guide to the Selection, Operation, and Maintenance of Shackles in Cold Environments

In port loading and unloading, offshore engineering, mining, wind power installation, and lifting operations in high-latitude regions,   shackles  often need to be used for extended periods in frigid environments. However, low temperatures are not simply a matter of being “a little colder”—they directly affect the mechanical properties of metal materials, thereby impacting lifting safety. Understanding and mitigating this change is crucial for ensuring the safety of every critical lift. How Low Temperatures Affect the Material Properties of Shackles？ Most shackles are made of carbon steel or alloy steel, which offer good strength and toughness under normal temperatures. However, in cold environments, steel undergoes the following changes:   Decreased Toughness and Increased Brittleness As temperatures drop, the ductility and energy absorption capacity of steel significantly decrease. Under impact or sudden loading, it becomes more prone to brittle fracture.   Increas...
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Does rain reduce sling capacity — or does it create other risks?

  Weather conditions are often neglected in lifting operations. While most operators focus on the Working Load Limit (WLL) of a sling, environmental factors—particularly rain and moisture—can significantly impact its safe use. So, does rain actually weaken a lifting sling? Or does it introduce different risks altogether? This article explains  how wet conditions affect lifting slings , using clear examples and practical guidance for safe operations. Do Wet Slings Lose Load Capacity? Rainwater  does not reduce the rated working load limit (WLL)  of a lifting sling. A  1-ton sling remains rated at 1 ton , provided the sling is structurally sound and undamaged. However, moisture conditions introduce a range of other serious risks, which can indirectly and significantly compromise the safe load-bearing capacity of a sling. Therefore, it is essential to reduce its safe working load. Key Risks Introduced by a Moisture Environment Increased Weight (For Synthetic Slings...
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