What are the purchase standards of broken bridge aluminum doors and windows? This is also a problem that customers are worried about, because now many suppliers are doing whatever they can to make profits, which makes many customers suffer a lot of dumb losses! All of the aluminum doors and windows under the company's standard analysis of Shanghai window!
Selection standard of broken bridge aluminum doors and windows
The thickness, strength and oxide film of aluminum profiles used for high-quality aluminum alloy doors and windows shall comply with the relevant national standards. The wall thickness shall be more than 1.2 mm, the tensile strength shall be 157 n / m2, the yield strength shall be 108 n / m2, and the oxide film thickness shall be 10 μ M. If not up to the above standards, it means that this is poor quality aluminum alloy doors and windows, can not be used.
Selection standard of broken bridge aluminum doors and windows II: look at processing
High quality aluminum alloy doors and windows, fine processing, exquisite installation, good sealing performance, switch freely. Poor quality aluminum alloy doors and windows, blind selection of aluminum profile series and specifications, rough processing, saw cutting instead of milling processing, installation not in accordance with the requirements, poor sealing performance, not only air and rain leakage and glass burst phenomenon, but also encounter strong wind and external force, easy to pull parts or glass blow or hit, damage and hurt people.
Third look at the price of the selection standard of broken bridge aluminum doors and windows
In general, the price of high-quality aluminum alloy doors and windows is about 30% higher than that of inferior aluminum alloy doors and windows due to its high production cost. The tensile strength and yield strength of some aluminum alloy doors and windows made of aluminum profiles with wall thickness of only 0.6-0.8 mm are much lower than the relevant national standards and are not safe to use.