Anyone working in the lifting industry should know about slings. There are two main types of slings: metal slings and synthetic fiber slings. Metal slings mainly include wire rope slings, chain slings, and sling slings; synthetic fiber slings mainly include ropes and belt slings, and ropes are divided into nylon, polypropylene, polyester, High-strength and high-modulus polyethylene fiber.
So how do you understand the sling, sling, and gear in the sling? Therefore, the name implies hoisting means hoisting, cable means connection, and tool means tool, that is, hoisting function is a tool connected together. Here is how to choose the right sling for everyone.
First: choose the sling from the concept
Wire rope slings are processed from steel wire ropes and are mainly used for hoisting, traction, tensioning and load-bearing ropes. They have high specific strength, light weight, stable work, and are not easy to break suddenly. They are widely used in steel, chemical industry, etc. Transportation, port and other industries.
Chain rigging is a rigging made of metal chain links. According to its formation, there are mainly two types of welding and assembly. According to its structure, it is single and multiple. It is made of high-quality alloy steel. Its outstanding characteristics are wear resistance and resistance. High temperature, low ductility, no elongation after stress, etc. It has a long service life and is easy to bend, which is suitable for large-scale and frequent use occasions. Flexible multi-limbs and multiple combinations can improve work efficiency and reduce costs.
The complete set of sling rigging consists of the main ring, link shackle, sling, and metal end components. The main ring includes long rings, round rings, combined rings, etc. Connecting shackles include bow shackles, chain shackles, etc. The hoisting belt includes flat belts and round belts, and the metal ends include various hooks and other metal parts. This set of sling rigging can be freely optimized and combined according to customer needs.
Second: choose the sling from the precautions for use
Wire rope sling hoisting attention: 1. If it is a single-leg hoisting belt, the hanging point must be vertically above the center of gravity of the object to be hoisted; 2. If it is a double-leg hoisting, the hoisting point should be located on both sides of the cargo, with the hooks on both sides of the goods being hoisted. Above the center of gravity of the object; 3. If it is three-legged or four-legged hoisting, the hanging point must be symmetrically located on the plane around the cargo, and the hook is located directly above the center of gravity of the object to be lifted.
Lifting belt rigging attention: 1. Please pay attention to the relationship between the included angle and the load tonnage during use; 2. If the lifting belt used in the complete set of rigging is damaged, it cannot be used; 3. Avoid impact or vibration load; 4. The safety factor is 4:1, and the specific is 5:1 or 6:1, which should be used within the safety factor.