Aluminum doors and windows quality standards
1. Aluminum：
We use 6063T5 corrosion resistant extruded aluminum alloy (in accordance with CNS standards and JIS specifications).


2. Surface finish：
The surface finish of the extruded aluminum directly affects the lifespan of these products. The choice of color can be natural, a secondary color development, or a color chosen to suit the customer's requirements. A chemical film with a thickness of more than 10µ is applied followed by sealing treatment of the porous layer to give a corrosionresistant capacity of more than 50 seconds. Another layer, 7µ thick, is then added to lengthen lifespan and improve visual appearance.3. Hardware fittings：
The hardware fittings used on our aluminum doors and windows are of the highest quality and play a vital role in their use and lifespan. We regularly review design, placement and quality of the fittings used. These are issues with direct impact on the function, use, and lifespan of our products. All the hardware fittings used on our doors and windows comply with the requirements of CNS3092A2044.1.Nonmagnetic stainless steel screws and window catches are used throughout.
2.The rollers are good for over 40,000 pulls.
3.The PVC strips we use meet the following specifications:
Temperature sensitivity tests： 
Below 85° hardness at 0℃ , above 50° hardness at 40oC, with a hardness difference of more than 30° 
Tensile test： 
100% elastic modulus of 30 kg/cm^{2} and a tensile strength of 75 kg/cm^{2} and an elongation rate of above 280%. 
Tensile test after heating： 
Retains a tensile strength of above 85% and an elongation rate of above 70% after heating. 
Heating loss： 
Below 7%. 
Coefficient of thermal expansion： 
Below 3.5%. 
Compression set： 
Below 75%. 
Flex temperature： 
Below 30℃. 
4. Dimensional tolerance：
Our aluminum windows have a width and height dimensional tolerance of ±2mm; that of the opposing sides of external window frames is less than 2mm. The depth tolerance of all the window frames is within ±1.5mm.5. Wind resistance, airtightness and watertightness：
The customer is free to choose from five different levels of wind resistance according to design requirements.【Level 160】  Wind pressure of 160 kg/m^{2} (36.9 m/sec) which is equivalent to a mediumstrength typhoon of scale 12. Suitable for use on the 5th floor and below. 

Warpage:  Horizontal warpage at the centerline does not exceed 1/150 of the total length. Warpage at the joint area of the inner frame does not exceed 1/80 of the total length. 
Airtightness:  The aluminum window is subject to a standard pressure difference of 1 kg/m^{2} between the inside and outside. The hourly ventilation volume per square meter of area through the gaps along the four edges and the stacked area at the center shall be below 30 m^{3}/Hr.m^{2}. 
Watertightness:  The outside of the aluminum window is sprayed with water at 4l/min.m^{2} at a pressure difference of 15 kg/m^{2} continuously for 10 minutes. The test requires that no leakage should be observed. 
【Level 200】  Wind pressure of 200 kg/m^{2} (41.4 m/sec) which is equivalent to a mediumstrength typhoon of scale 13. Suitable for use on the 10th floor and below. 
Warpage:  Horizontal warpage at the centerline does not exceed 1/150 of the total length. Warpage at the joint area of the inner frame does not exceed 1/80 of the total length. 
Airtightness:  The aluminum window is subject to a standard pressure difference of 1 kg/m^{2} between the inside and outside. The hourly ventilation volume per square meter of area through the gaps along the four edges and the stacked area at the center shall be below 8 m^{3}/Hr.m^{2}. 
Watertightness:  The outside of the aluminum window is sprayed with water at 4l/min.m^{2} at a pressure difference of 25 kg/m^{2} continuously for 10 minutes. The test requires that no leakage should be observed. 
【Level 240】  Wind pressure of 240 kg/m^{2} (46.1 m/sec) which is equivalent to a strong typhoon of scale 14. Suitable for use on the 10th floor and above. 
Warpage:  Horizontal warpage at the centerline does not exceed 1/150 of the total length. Warpage at the joint area of the inner frame does not exceed 1/80 of the total length. 
Airtightness:  The aluminum window is subject to a standard pressure difference of 1 kg/m^{2} between the inside and outside. The hourly ventilation volume per square meter of area through the gaps along the four edges and the stacked area at the center shall be below 8 m^{3}/Hr.m^{2}. 
Watertightness:  The outside of the aluminum window is sprayed with water at 4l/min.m^{2} at a pressure difference of 35 kg/m2 continuously for 10 minutes. The test requires that no leakage should be observed. 
【Level 280】  Wind pressure of 280 kg/m^{2} (50.9 m/sec) which is equivalent to a strong typhoon of scale 15. Suitable for use on the 10th floor and above. 
Warpage:  Horizontal warpage at the centerline does not exceed 1/150 of the total length. Warpage at the joint area of the inner frame does not exceed 1/80 of the total length. 
Airtightness:  The aluminum window is subject to a standard pressure difference of 1 kg/m^{2} between the inside and outside. The hourly ventilation volume per square meter of area through the gaps along the four edges and the stacked area at the center shall be less than 2 m^{3}/Hr.m^{2}. 
Watertightness:  The outside of the aluminum window is sprayed with water at 4l/min.m^{2} at a pressure difference of 35 kg/m^{2} continuously for 10 minutes. The test requires that no leakage should be observed. 
【Level 360】  Wind pressure of 360 kg/m^{2} (56 m/sec) which is equivalent to a strong typhoon of scale 16. Suitable for use on the 10th floor and above. 
Warpage:  Horizontal warpage at the centerline does not exceed 1/150 of the total length. Warpage at the joint area of the inner frame does not exceed 1/80 of the entire length. 
Airtightness:  The aluminum window is subject to a standard pressure difference of 1 kg/m^{2} between the inside and outside. The hourly ventilation volume per square meter of area through the gaps along the four edges and the stacked area at the center shall be less than 2m^{3}/Hr.m^{2}. 
Watertightness:  The outside of the aluminum window is sprayed with water at 4 l/min.m^{2} at a pressure difference of 50 kg/m^{2} continuously for 10 minutes. The test requires that no leakage should be observed. 