Now, a considerable number of consumers who are not familiar with the market of aluminum ceilings generally have such misunderstandings: The thicker the plate is, the thicker the keel is, and the stronger the hardness, the better. In order to meet these people's requirements, many manufacturers are pursuing thickness and hardness one-sidedly, and the surface treatment has sprayed more layers of paint or used some relatively heavy recycled newspapers such as iron, lead, and zinc to make aluminum plate or other miscellaneous aluminum plates. The substrate has a low price and its hardness and thickness can be satisfied. The proportion of such alloys in the product can not be controlled, resulting in the product easily oxidized. At the same time, due to the large amount of recycled aluminum used, it is toxic to the human body, and harmful (such as lead, mercury, chromium, etc.) metal components excessively exceed the standard, have radioactivity, and have an effect on human cells. Larger radiation and injuries are serious hazards to human health. This is one of the reasons why aluminum prices have been rising in the market with extremely low price aluminum buckles.
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The common consumers do not have enough knowledge of the aluminum plate material when purchasing the aluminum buckle plate, and can be identified by the following simplest method:
Visual inspection of the surface of the substrate gloss is good, no cracks, corrosion, wear vents, creasing, creases and severe scratches, oil stains, sticking, imprints, pine dendrites, metal and non-metal indentations, etc., aluminum Smallpox cross section, no black, gray, green and other impurities.
A. Pick up the board and feel its weight. The board is thick and light and good elasticity is excellent.
B. Hold the side corner of the board by hand and shake it to see how tough the board is. Resilience is the most important sign of board quality. In other words, the ability of the pinch plate to change back to the original shape before the force was changed by the external force is not good. The gusset plate is mainly composed of four types of coated plate, baked plate, drawn plate and anodized plate.
1. The film is coated with a thin film on top of the aluminum substrate. The color of the film is not rich. At present, LG film is considered to be better, but the application of integrated ceiling in the country will definitely not exceed one, many small businesses have lied that they are using this film, we must pay attention to, do not be fooled. Then there is the Taiwan film and the domestic film. The aging resistance and discoloration resistance of the Taiwan film are greatly superior to the domestic film.
2. Painted plates are mostly matt plates, ie, the plates are not reflective. If such plates are used, it must be seen whether the surface paint layer is even and has no ripples. If it is not even, if it is not corrugated, it will produce different colors after the board is installed on the shed.
3. Drawing board, drawing on the aluminum substrate, mainly aluminum color, with little color. There are smooth drawing and rough drawing. The smooth drawing surface is smooth and smooth, while the drawing of hair surface has a channel due to its surface drawing, which is just not suitable for oily places.
Ceiling to buy paint
CARBON STEEL FOR FLANGES :
ASTM A105/A105N .A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2
A694 F42, F46, F48, F50, F52, F56, F60, F65, F70
A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange Wind tower flanges )Steel RST37.2, C22.8
STINLESS STEEL FOR FLANGES :
ASTM A182 F304/304L, F316/316L, F316H, F316TI, F310, F321;
Alloy Steel: ASTM A182 F1, F5, F9, F11, F22, F91
Duplex & Super Duplext Steel: ASTM A182 F51/UNS S31803, A182 F53/UNS S32750
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