Introduction

The fence is mainly used for the protection belt on both sides of the bridge beside the highway, highway and highway as a guardrail net, and can also be used for the security protection of airports, ports, docks, municipal construction parks, lawns, zoos, pools, lakes, roads, isolation and protection of residential areas, hotels, hotels, supermarkets, entertainment protection and decoration products.

Quality of profiles

With the naked eye inspection, you can also put forward the conclusion that the quality is good or bad, mainly check the following aspects:

(1) First check the wall thickness of the profile, it is true that the thin-wall profile cannot be used.

(2) Check the flatness of the surface of the profile, such as the hollow profile, to see whether there is depression and bulge on the four sides.

(3) Check the profile 6 meters long, whether there is an obvious twist, twist is very large can not be used, because in the casting aluminum window, to screw the profile straight, so that the profile in the window there is always the original twisting stress.

(4) Check the surface of the profile for open bubbles (white spots) and ash (black spots).

(5) The surface of the profile is not allowed to have cracks, burrs, peeling, corrosion.

(6) The surface of the profile is not allowed to have obvious scratches, pits, and bruises.

(7) The profile is bent with both hands, the twisting strength is good, and it can be restored after letting go. Not too soft, like "noodles" must not be used.

(8) The same profile is not allowed to have two colors with different shades.

(9) Put several profiles together to see the color difference size, such as the color difference is very large, not easy to use.

(10) Use a smooth hard object (iron) on the surface of the profile, lightly scratch, leaving a white scratch on the surface of the profile, if it can be wiped off by hand, indicating that the oxide film has not been wiped off, such as the white scratch can not be wiped off by hand, the oxide film has been scratched off, indicating that the oxide film is poor in firmness, the oxide film is too thin, and the oxidation quality of aluminum is poor.

The quality of aluminum is related to many factors, the above is a very simple and popular introduction, mainly for users to buy aluminum has a preliminary basis for material selection, do not be fooled. When purchasing materials, we should see the test report, listen to the salesman's rambling, and the desire for cheap, so it is easy to buy back unqualified aluminum to cause hidden dangers to the building.

(11) Hollow profile hole heart wall blue, blue, yellow. All are scrap aluminum