The heavy chain is strictly prohibited after the deformation break, and the chain is abnormal. Due to the overload or maintenance of the overload or maintenance in the process of use. In order to avoid this abnormalities, it is necessary to use it without overload and maintain it regularly. The risk coefficient after deformation of the lifting chain increases, so we must not make trouble. The lifting chain is mainly used on the lifting gourd and other lifting equipment. It is one of the important lifting of the lifting and traction operation. It is widely used in manufacturing, mining, transportation and other fields. It can be said that it provides a lot of convenience for our production and life. The lifting chain also called up the heavy hanging chain and the short ring chain for the lifting and reasons, because it is composed of a short -loop chain welded by round steel, and The lifting crane is made from the test.