In the door and window hardware industry, the relevant quality inspection departments have not explicitly stipulated the required quality assurance period standard, which reflects from one side that the concept of quality assurance is not very important. Many businesses in the market will say that their products can be guaranteed for ten years. In fact, they are making selling points and have no practical effect.
Although there is no warranty period standard, there are still quality inspection and a series of data indicators related to the product.
Door and window hardware products belong to physical structure products, and there will be physical losses in the use process. Almost all hardware products are based on the standard that the products can operate normally without obvious damage under the use times and stress conditions. For example, ground spring: if the product can operate normally after 400000 times of operation, it is a national qualified quality inspection product. Therefore, under normal use conditions, such products may not have problems for several years or even more.