Boei is a kind of sling, which is widely used in various industries such as electric power, metallurgy, petroleum, machinery, railway, chemical industry, port, mining, construction and so on. Boeis are the same as other slings. They have their own set of application and invalidation specifications. Note for the use of boeis: The boeis must correctly support the load.
Dit wil sê, die effekskrag moet langs die as van die middellyn van die boei wees om buiging en onstabiele vragte te voorkom, om nie te praat van oorlading nie. Die gebruik en ongeldigheid van dieboei should be rolled flexibly in the lifting hole, and no jamming is allowed. Phenomenon: The boei body must not bear the effect of lateral bending moment, that is, the effect bearing capacity should be in the plane of the body.

Die maksimum ingesluit hoek tussen die twee bene wat deur dieboei cannot be greater than 120 degrees. The use and invalidation of boeis The boei is that when the wire rope sling is used as a binding sling, the horizontal pin part of the boei should be connected with the keyhole of the wire rope sling. The appearance is when the rigging is lifted.

Die konflik tussen die tou en dieboei causes the boei to roll, and there is a risk of detachment. The use and invalidation specifications of the boei. The pin is deformed up to 5% of the original size; the bolt is necrotic or slippery.