Because glass has good mechanical properties and thermal stability, so widely used in the construction, transport and other areas. Flat glass used for windows and doors of buildings, walls, walls and windows, furniture glass, curved glass used in cars, trains and planes and so on. Use should be noted that the glass is not cutting, grinding glass tables, corners not knocking squeeze 12mm tempered glass, adjustment shall be readily available sizes or choose specific design drawings into custom processing. Glass used for large areas of glass curtain wall on the steel should be controlled, choose semi-tempered glass, that the stress is not too large, in order to avoid vibrations caused by wind loads and blew. Tempered glass with high impact strength (4-5 times higher than ordinary plate glass), flexural strength (5 times higher than ordinary plate glass), good thermal stability and smooth, transparent, can be cut and so on. In the case of impact damage, super 8mm tempered glass, debris was scattered small granular, free of sharp edges, so called safety glass. Tempered glass according to the shape into flat glass and curved glass. 4,5,6,8,10,12,15,19mm eight kinds of flat glass thickness; curved glass thickness 5,6,8mm three. Tempered glass into their appearance quality: superior products, quality products categories. Tempered by debris state is divided into: Class I, Ⅱ and Ⅲ class.