Aluminum alloy doors and windows in the factory to undergo rigorous performance testing, to achieve the required performance indicators before the installation and use.
Aluminum doors and windows usually check the following main properties:
1.Strength The strength of the aluminum alloy doors and windows is used in the pressure box for compressed air pressure test to be added to the grade, the unit is n/m2. The general performance of aluminum alloy door and window strength of up to 196l~2353n/m2, high-performance aluminum alloy window up to 2353~2764n/m2.
At the above pressure, the maximum displacement of casement should be measured less than the l/70 along the height of the frame.
2.Air tightness Aluminum Alloy window in the pressure test chamber, so that the window before and after the formation of 4.9~9.4n/m2 pressure difference, its per m2 area per h ventilation volume (m3) to indicate the air tightness of the window, the unit is m3/(H m2).
General performance of aluminum alloy window before and after pressure difference for 9.4n/m2, air tightness can reach 8m3/(h m2) below, high sealing aluminum alloy window up to 2m3/(h m2) below. 3.Water tightness Aluminum Alloy window in the pressure test chamber, the outside side of the window to add a period of 2s pulse pressure of sine wave. At the same time to the window at every min per m2 spray 4L of artificial rainfall, continuous 10min "Stormy" test, in the indoor side should not be visible leakage of water seepage phenomenon. Water tightness is expressed by the average pressure of the pulsed wind pressure applied during the test. The general performance of aluminum alloy windows for 343N/M2, typhoon-resistant high-performance windows up to 490n/m2.