Lifting chains are a robust tool that serves as a vital component across various industries. By understanding the different grades of lifting chain and their applications you are helping to ensure safe and efficient lifting operations. This guide seeks to shed light on how to select an appropriate chain based on load capacity, environmental considerations and industry-specific requirements.
Chain Selection Factors
- Load Capacity: It is imperative to determine the maximum weight that the chain will bear. Chains with higher grades can handle heavier load capacities and tensile strength.
- Environmental Conditions: You need to consider the environment where the chain will be used. For example, marine or corrosive environments may require chains with enhanced corrosion resistance, such as galvanised or stainless steel chains.
- Industry Requirements: Different industries have differing regulations and standards for lifting equipment. It is important to ensure that your selected chain complies with industry-specific standards, certifications, and safety requirements.
Chain Grades
Lifting chains are available in various grades, each designed to meet specific load capacities and operational conditions. Additionally, pre-built chain slings in Grade 80, Grade 100 or Grade 120 are also available. These grades an indicative of the chain’s tensible strength, durability, and suitability for different applications. One of the safety measures implemented was to place chain in Grades based on the ultimate breaking strength of that chain. This number is what we see today G30, G43, G70, G80 & G100 and the common chain grades. The number after each letter is N/mm2. For example, G80 means that the maximum stress on the chain at ultimate strength is 800 newtons per millimeter squared.
Applications by Chain Grade
- Grade 80 (G80) Chains: engineered for heavy lifting in demanding conditions, these chains excel in industries such as mining, construction, and offshore rigging. They have immense strength and durability, allowing them to withstand large loads.
- Grade 100 (G100) Chains: These chains provide more strength than those of Grade 80 and are essential in heavy-duty lifting operations. These chains are often used in industries such as construction and mining due to the chain’s durability and reliability.
- Grade 120 (G120) Chains: These chains are designed for the most demanding lifting tasks and are indispensable in situations requiring extreme strength and durability. Grade 120 chains are often used in heavy construction and industrial settings.