Will the aluminum doors and windows 11.2mm and 1.4mm how to identify? Profile 828,888,757,898, what does that mean? What is the thickness requirement?
To see the sample! General production and processing have samples! GB also has provisions! Aluminum alloy wall thickness is generally greater than 1.4mm, wall thickness greater than 2mm measuring box ruler!
According to state regulations, high-quality aluminum doors and windows used in aluminum, its thickness, strength and oxide film are uniform standards. Such as aluminum alloy doors and windows of the aluminum wall thickness should not be less than 1.2mm, oxide film thickness should reach 10 microns and so on.
Aluminum alloy doors and windows thickness can be measured using a vernier caliper or micrometer.
The oxide film should have a thickness of 10 microns. When you buy, you can tap the surface of the profile to see if the oxide film on its surface can be wiped off.
There is no way to identify, it is impossible to remove the amount of the general are not enough!
