The wholesale quality of insulated broken bridge doors and windows can be roughly judged from the raw aluminum profiles, followed by inspection of the surface treatment and internal processing quality of the broken bridge profiles, and the price of the broken bridge aluminum doors and windows.

　　Quality Standard:

　　Look at the material; the thickness, strength, and oxide film of the aluminum profiles used for broken bridge doors and windows must comply with national standards. The wall thickness should be above 1.2mm, the tensile strength should be qualified, and the yield strength should reach 108 Newtons per square millimeter. , The thickness of the oxide film should reach 10 microns; if it does not meet the above standards, it is inferior broken bridge profiles, doors and windows, and it is not recommended to buy and use.

　　Second, look at the processing; good quality broken bridge profiles, doors and windows, fine processing, careful installation, good sealing performance; inferior broken bridge profiles, doors and windows, rough processing, using sawing instead of milling, completely not installed as required, poor sealing performance , Not only leakage of wind and rain or even glass cracking phenomenon, but also when encountering strong wind and external force, it is easy to scrape and knock the sliding part or glass off, destroying and hurting people.