First, it is necessary to understand the national and industry evaluation standards for the air tightness and water tightness of aluminum alloy thermal insulation external casement windows. These standards usually specify test methods, grading indicators and qualified judgment conditions, which are the basis for evaluation.
Air tightness evaluation is mainly carried out by pressure difference method or tracer gas method. Under standard conditions, by simulating different pressure differences, the amount of air passing through the gaps of doors and windows per unit time is measured to determine its air tightness performance. Generally speaking, the higher the air tightness performance level, the better the air tightness performance of the doors and windows.
Water tightness evaluation usually adopts spray method or static pressure method. Simulate the scene of heavy rainfall, apply a certain pressure of water flow to the outside of the doors and windows, and observe whether there is water seepage or leakage in various parts of the doors and windows. The water tightness performance grading index generally uses the pressure value of the previous level of the severe leakage pressure difference as the grading standard.
The quality of sealing materials directly affects the air tightness and water tightness of doors and windows. During the evaluation, the material, elasticity, and aging resistance of the sealing strip should be checked to ensure that it can effectively block air and moisture penetration.
The structural design of doors and windows is also an important factor in evaluating their air tightness and water tightness. Reasonable structural design should adopt measures such as multi-channel sealing and additional windproof strips to improve the sealing performance of doors and windows.
In addition to the above test methods, the air tightness and water tightness of aluminum alloy thermal insulation external casement windows can also be evaluated through actual use experience. Under severe weather conditions, observe whether the doors and windows have air leakage and water seepage, as well as their impact on indoor temperature and humidity.
You can fully understand the air tightness and water tightness of aluminum alloy thermal insulation external casement windows. When choosing, you should give priority to those products that have been certified by authoritative organizations and have higher air tightness and water tightness performance levels to ensure their excellent performance and safe and reliable use.
