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A look at the materials. The aluminum profiles used in high-quality aluminum alloy door and window equipment, thickness, strength and oxide film, should comply with the relevant national standards, the wall thickness should be above 1.2 mm, and the tensile strength reaches 157 Newtons per square meter. The yield strength should reach 108 Newtons per square millimeter, and the thickness of the oxide film should reach 10 microns. If the above standard is not met, it is inferior aluminum alloy door and window equipment, which cannot be used.
Second, processing. High-quality aluminum alloy door and window equipment, fine processing, exquisite installation, good sealing performance, easy to switch. Inferior aluminum alloy door and window equipment, blindly choose aluminum profiles and specifications, processing coarse and shoddy, cutting instead of milling, no Installation according to requirements, poor sealing performance, the switch is not free, not only leaking wind and rain and glass bursting phenomenon, but also encounter strong wind and external force, it is easy to scrape or touch the sliding part or glass, destroying and injuring people.
Third, look at the price. Under normal circumstances, high-quality aluminum alloy door and window equipment due to high production costs, the price is about 30% higher than the inferior aluminum alloy door and window equipment. Some aluminum alloy door and window equipment made of aluminum profiles with a wall thickness of only 0.6-0.8 mm, The tensile strength and yield strength are much lower than the national standards. It is very unsafe to use. In addition, there are many self-employed households who process aluminum alloy doors and windows. They do not understand the structural characteristics and performance of aluminum alloy door and window equipment.
In order to reduce the cost of cutting corners, shoddy, product hidden dangers are generally not suitable. It is better to use the products of regular aluminum alloy door and window equipment manufacturers. Here is a special point: the current national standard profile thickness is 1.4mm, If the supplier chooses 1.2mm or 1.0mm wall thickness or even thinner materials, it is a non-standard product, please pay attention when purchasing.
The quality of aluminum alloy door and window equipment can be judged from the selection of raw materials, the surface treatment of aluminum and the quality of internal processing, and the price of aluminum alloy door and window equipment. The following is a brief introduction to how to judge the quality of aluminum alloy door and window equipment: