National standard for thickness tolerance of broken bridge aluminum

According to GB/T 5237 Aluminum Alloy Building Profiles, the minimum nominal wall thickness of building aluminum profiles should not be less than 1.2mm, in which the allowable deviation of solid profiles is 0. 15mm, that is, the wall thickness should not be less than1.05mm; ; The allowable deviation of the wall thickness of the hollow profile with closed cavity is 0.23mm, that is, the wall thickness shall not be less than 0.97mm..

"In the market, except for the materials of some regular factories, the wall thickness of many aluminum profiles is only 0.8-0.9 mm, and some small factories are only 0.6 mm," said Mr. Wang, who runs aluminum doors and windows in some building materials markets.

Why are the wall thicknesses of aluminum profiles so different? Mr. Wang believes that the competition in aluminum industry is fierce, and the price war between enterprises is great, but it is also profitable, so some hands and feet have been done on the wall thickness of aluminum profiles. In fact, consumers' lack of aluminum knowledge and weak safety awareness have created a hotbed for the survival of inferior aluminum profiles. "Because they don't understand the quality of aluminum, many consumers pay attention to price rather than quality when purchasing aluminum doors and windows. Thin aluminum profiles are often 20%-40% lower than qualified aluminum profiles. " Inferior aluminum doors and windows whose wall thickness is not up to standard are easy to guide doors and windows, and their ability to resist wind pressure and blow is greatly weakened, which is easy to deform windows and even the window sash will fall off. "The wall thickness of aluminum profiles is an important standard affecting the quality of construction projects. According to this common sense, it is obviously safe for consumers to buy aluminum profiles. "

Aluminum alloy profiles have the characteristics of high strength, strong corrosion resistance and difficult deformation. Why are some aluminum alloy doors deformed after less than a year? After analysis, under normal use, the deformation of aluminum alloy doors may be caused by the thin thickness of aluminum alloy profiles used.

It is understood that at present, aluminum alloy indoor doors available for consumers in the building materials market have various thicknesses such as 0.8 mm, 1.0 mm, 1.2 mm, etc ... Among them, aluminum alloy doors with a thickness greater than 1.0 mm have better strength and will not be deformed for 5-8 years under the premise of normal use. In order to reduce production costs, some small manufacturers cut corners and even use aluminum alloy profiles with a thickness of only 0.6 mm to make bathroom door. This kind of aluminum alloy door is easy to deform because the material thickness is not enough.

The national standard wall thickness of aluminum alloy doors and windows shall not be less than 1.2MM, while the wall thickness of door frame shall not be less than 2.0MM The national standard wall thickness of broken-bridge aluminum doors and windows shall be1.4mm. Please keep your eyes open when choosing aluminum alloy doors and windows or broken-bridge aluminum doors and windows.