Take a look at the materials. The aluminum profiles, thickness, strength and oxide film used for good aluminum alloy doors and windows should comply with the relevant Chinese standards. The wall thickness should be above 2.0 mm, the tensile strength should reach 157 Newtons per square millimeter, the yield strength should reach 108 Newtons per square millimeter, and the oxide film thickness should reach 10 microns. If the above standards are not met, the aluminum alloy doors and windows are of inferior quality and cannot be used.
Second look at processing. Good aluminum alloy doors and windows, fine processing, exquisite installation, good sealing performance, easy to open and close. Inferior aluminum alloy doors and windows, blindly select the series and specifications of aluminum profiles, shoddy processing, use saw cutting instead of milling, do not install as required, poor sealing performance, inconvenient switching, not only air leakage and rain and glass bursting phenomenon, but also encounter Under strong wind and external force, it is easy to scrape or knock down the sliding part or the glass, causing damage to people.
Three look at the price. In general, the price of good aluminum alloy doors and windows is about 30% higher than that of inferior aluminum alloy doors and windows due to the high production cost. Some aluminum alloy doors and windows made of aluminum profiles with a wall thickness of only 0.6-0.8 mm, the tensile strength and yield strength are lower than the relevant standards in my country, and they are prone to injury. In addition, there are many self-employed people who process aluminum alloy doors and windows, and they do not understand the structural characteristics and performance of aluminum alloy doors and windows. In order to reduce costs and cut corners, use shoddy products, and the hidden dangers of products are relatively large, so it is generally not suitable to use. Choose products from regular aluminum alloy doors and windows manufacturers. Here is a special point: the thickness of the profile in my country is 1.4mm. If the supplier chooses a material with a wall thickness of 1.2mm or 1.0mm or even thinner, it is a product that does not meet the standard. Please pay attention when purchasing .
