How to identify quality lifting chain?

At present there are 80,100 level lifting chain, buy  Rope hoist  ,  manual hoist  and other equipment, chain quality is essential, here tells you how to identify the lifting chain quality?

The most important is that  load chain  fastening, and most likely to occur where the phenomenon is not tight at the inclination of doors and windows, such as welding is not good, and a certain degree of strength to withstand the pressure occurs after fracture phenomena. So buy it, pay attention to whether the inclination of doors and windows are hand welded, if the manual welding, insulation and windows that can not reach the high standard anti-stress.
Lifting chain structure in different ways, its hardware accessories are also different, different ways to make doors and windows open tightness are very different, their prices are not the same. In general, if the selected hardware accessories imported brands, the price and quality is relatively higher. Of course, some brands may be somewhat less of small manufacturers in order to save cost and reduce the accessories, such as double-sided locking pieces should be, he may be changed to a single set of accessories.