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  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...

  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...

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...