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Major Measurements of Aluminum Doors & Windows
Posted: 2015-09-10 22:29:54 Hits: 1819
Aluminum doors and windows need to be tested according to the following measurements before them have been put into the market.
1. Intensity
The intensity of aluminum doors and windows should be presented with a specific level; the unit is N / m2. The normal kind of aluminum doors and windows should reach the number of 196l —2353N / m2, but the superior ones can reach to 2353-2764N / m2. The pressure of casement center should be less than the maximum amount of l/70.
2. Air tightness
In the pressure test chamber, the pressure difference of aluminum doors and windows can be tested, and have the related numbers to indicate their air tightness, and the unit is m3/(h/m2). When the pressure difference is up to 9.4N/m2, the air tightness of normal kind of doors and windows is below 8m3/ (h/m2), and superior kind can below to 2m3/(h/m2).
3. Water tightness
In the pressure test chamber, aluminum doors and windows should endure the stormy test for 10 minutes, namely the workers will jet water to the doors and windows every minute with 4L water totally, and the inside of window should not have seepage. The water tightness also has a specific unit. The normal kind can reach the number of 343N / m2, the superior one should reach the number of 490N / m2.
4. Closing and opening force
After installing the glass, the closing and opening force of windows should below 49N.
5. Sound insulation
In the sound tested laboratory, we can test the sound transmission loss of aluminum windows, when the sound reaches to a certain degree, there will be a constant loss. Through this method, we can get a curve to indicate the level of sound insulation. The normal can reach the level of 25dB and the superior one can up to 30 —45dB.
6. Heat insulation
Convection impedance value is often used to present the heat insulation of windows, the unit is m2/h/C/KJ, and has three levels: R1=0.05,R2=0.06,R3=0.07. The aluminum windows with double glass, the heat insulation can up to 0.05m2/h/C/KJ.
7. Durability of nylon wheels
Sliding windows and casement need to have a special repeat test using a electrical machine. The nylon wheel with the diameter of 12 — 16mm should be test for 10000times, and 20 —24mm should be tested for 5000 times, 30 — 60mm,tested for 100000 times to ensure their durability.
8. Durability of lock
The lock should has a pull test on an electrical machine and with the speed of 10 — 30 times per minute, when the time reach to 30000times, the lock should have no damage.
