As a major part of the mechanical drive - chain in machinery and equipment industry has played an important role in lifting chain, with it can make proper functioning of the machinery and equipment, so the quality of the chain is very high. Our production chain as a major industry manufacturers, has a long history of production, advanced production equipment, strong technical force, improve the management system, detection means complete, for decades never had any quality problems, a large national market coverage praise the majority of users, product quality, special specifications can be customized according to user requirements. All products are has a limited life, in general, the length of life in addition to the material and the product itself, performance related, and our daily operation and maintenance of a very large contact, the same is true for the lifting chain , and its lifetime is saying the quality, the adequacy of the methods used and whether maintenance and other aspects of a relationship. Lifting chain of good quality life is relatively long, because the level of the chain there are many common are 70, 80, 100, etc., the higher the level, the safety factor of the chain of high quality will have a certain upgrade, so that the chain has a good wear resistance, the use of life will be longer period, so for the majority of manufacturers, the choice must pay attention to product quality, to select the appropriate chain based on the actual situation, in order to extend its life. Also even better quality products, we should also properly use, because the use of the adequacy of the impact of the chain of life, the correct use can reduce the chain wear Tianjin lifting chain, will not affect the life of the chain appears, in other words Chen had to extend the life of the role of the lifting chain, so we should be reasonable use of the product in order to ensure their normal life. In everyday use, we also should pay attention to maintenance 100 lifting chain, which is to extend the main part of their life, to regularly carry out maintenance on the chain, can reduce corrosion occurs, avoid corrosion, and compare the impact of the chain to use small, then life is affected due to improper maintenance, therefore routine maintenance is the key to extend its useful life. By pulling tension measuring chain elongation 1. To remove the entire chain of clearance  to be applied to some extent in the chain measurement 2. measurement   order to minimize errors in measuring 6-10 Section 3 (link) where The inner and outer L1 L2 size  roller measuring the number of links between the order of the judge dimension L = (L1 + L2) / 2 4. determine the length of the chain elongation  This value chain elongation before items Use limit values ??to compare the size of the chain elongation = judgment - a reference length / reference length * 100% reference length = chain pitch * number of sections _ lifting chain lifting chain Material Specification (Online) _ lifting chain from Hebei chen sling Manufacturing Limited. Hebei chen sling Manufacturing Co., Ltd. (www.qzhon.com) Hebei Baoding, forestry machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chen led force in a sling with the staff warmly welcome all inquiries negotiations to create chen sling a better future.