What do you mean by 80 and 90 aluminum alloy doors and windows?
There are five kinds of aluminum alloy doors and windows: push-pull aluminum alloy doors, push-pull aluminum alloy windows, flat aluminum alloy doors, flat aluminum alloy windows and aluminum alloy ground spring doors. There are national building standard design drawings.
Each kind of doors and windows is divided into basic doors and windows and combined doors and windows. Basic doors and windows are composed of frames, fans, glass, hardware fittings and sealing materials. Modular doors and windows are composed of more than two kinds of splicing materials or steering materials for basic doors and windows, forming other forms of windows and even windows and doors.
Each door and window is divided into several series according to the thickness of the door and window frame. For example, a 90 series push-pull aluminum alloy door with a frame thickness of 90mm is called a 90 series push-pull aluminum alloy door.
quality standard
1, depending on the material. The thickness, strength and oxide film of aluminum profiles for high-quality aluminum alloy doors and windows should meet the relevant national standards. The wall thickness of main stress rib of aluminum alloy window should be above 1.4 mm, the wall thickness of main stress rib of aluminum alloy door should be above 2.0 mm, the tensile strength should reach 157 Newton per square millimeter, the yield strength should reach 108 Newton per square millimeter, and the thickness of oxide film should be above.
If you can't meet the above standards, it is inferior aluminum alloy doors and windows and can't be used.
2. Look at the processing. High-quality aluminum alloy doors and windows, fine processing, exquisite installation, good sealing performance and convenient opening and closing. Inferior aluminum alloy doors and windows blindly adopt aluminum profile series and specifications, and the processing is shoddy. Saw instead of milling, not installed as required. Poor sealing performance, uncomfortable switch, not only air leakage and rain leakage, but also glass cracking. When encountering strong wind and external force, it is easy to scratch or touch the push-pull part or glass, damaging things and hurting people.
3. Look at the price. Under normal circumstances, the price of high-quality aluminum alloy doors and windows is about 30% higher than that of inferior aluminum alloy doors and windows because of 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 are far below the relevant national standards in tensile strength and yield strength, so they are unsafe to use.
In addition, there are many self-employed people who process aluminum alloy doors and windows, and they don't understand the structural characteristics and performance of aluminum alloy doors and windows. In order to reduce the cost, cutting corners and shoddy products have great hidden dangers and are generally not suitable for use. Choose the products of regular aluminum alloy doors and windows manufacturers.
It should be noted that the national standard profile has a thickness of1.4 mm. If the supplier chooses materials with a wall thickness of 1.2mm or even thinner, they are all unqualified products, which should be paid attention to when purchasing.